Will the GAC Trumpchi E8's floor deform after high-temperature storage at [[NEXKEEP_0]] degrees?

For a properly qualified aviation aluminium floor installation, storage at 80 degrees Celsius generally won't cause obvious deformation; if edge trim curls up or edge strips bulge, it's usually related to edge materials, the adhesive layer, or installation tension. Repeated hot-cold cycling in severe cold commuting deserves closer inspection.

After severe cold commuting, the biggest concern is curled-up edge trim

After commuting in severe cold in a GAC Trumpchi E8, the first thing worth checking is not a bulge in the center of the cabin aluminium panels, but whether the edge trim has curled up. The door sills, second-row sliding rail area, around the middle-row trim covers, and the inside of the tailgate are high-frequency spots: repeated shoe pressure, hot-cold cycling, and car-wash water intrusion can cause edge sealing to fail, exposing thin black lines, or even forming a step that can snag trouser cuffs.

For example, if the outdoor temperature drops to -15°C and the vehicle parks in a 25°C garage, the aluminium panels and the body metal shrink at different rates, making the installation tension on the edges more pronounced. If latches aren't fully pressed after seat removal, or the edge-trim strip screws are loose, the curled edge can easily be misdiagnosed as 'panel deformation'. Make this distinction: if only the trim strip lifts or the adhesive seam separates, it's mostly an edge-trim problem; only if the panel surface shows waves, creases, or loose fixing points does it involve panel stress and installation.

When inspecting, shine a hand lamp at an angle along the door sill, then press the curled edges and edge-trim strips. For slight lifting, first check whether the screws, clips, and sealant have taken in water or come loose; don't blast the aluminium panels with a heat gun, and don't keep prying with hard objects. If lifting, abnormal noise, or edges pressing on feet persist, have the installation shop re-fasten and reshape it as soon as possible rather than letting the sliding rails and trim cover joints get pulled further.

Why 80-degree storage affects installation stability

The risk of 80°C storage isn't that the aluminium panels suddenly go 'soft', but that the temperature difference causes the cabin flooring to enter obvious thermal expansion from a cold state. MPVs like the GAC Trumpchi E8 have a large cabin area, and after continuous sun exposure the surface temperature can rise far above the outside air temperature; if the vehicle previously experienced severe cold, an even larger temperature difference forms between the aluminium panels, body structure, and trim parts.

Take 6061 pure aluminium, with a linear expansion coefficient of about 23.6μm/(m·K). At an estimated temperature difference of 80°C, a 1.8-meter panel can freely expand and contract by about 3.4 millimeters. In actual installation, the panel is constrained on all sides by edge trim, latches, and fixing points, so it can't fully stretch, and excess displacement may turn into compressed seams, arched edges, or local warping. Fixing near hidden rails and middle-row trim covers is denser, so the stress shows more obviously there.

However, thermal expansion doesn't mean inevitable deformation. Whether 80°C is the measured cabin temperature or the parking environment temperature determines how much heat the aluminium panels actually absorbed; whether heating is uniform and whether installation clearance allowances are reasonable are equally critical. When inspecting, don't just look at whether the center bulges — also compare the edge-trim strips, around the middle-row trim covers, and the rail slots to see whether the lifting direction is consistent.

First distinguish thermal deformation from installation tension

After severe cold followed by 80°C storage, curled edges don't mean the aluminium was 'baked out of shape'. Estimate with a 2-meter panel: going from -20°C to 80°C, free expansion is about 4.7 millimeters; if one end of the aluminium is constrained, thermal expansion stress can push up the edge trim. If the HPL laminated surface blisters or delaminates, that's a trim surface heating issue and should be judged separately from panel body deformation.

First bring the vehicle temperature back to room temperature, then check both sides of the hidden rails, around the middle-row trim covers, and the edge trim seams. If the gaps widen uniformly with temperature and close again when cooling, it's closer to normal thermal expansion and contraction; if it always pushes up at the same spot, doesn't return after disassembly, or looseness and abnormal noise appear near rail fixing points, then check installation tension. The former is about clearance allowance, the latter about pre-tightening and installation deviation.

Have the installer loosen the edge-trim fixing points and rail connectors in turn, then re-measure the same gap: if it clearly closes after loosening, the main cause is installation tension; if the aluminium substrate is still flat with only an HPL surface bulge, or the gap changes repeatedly with hot and cold, then treat the bonding and expansion allowance separately. The GAC Trumpchi E8 has many middle-row passages and trim covers, so don't stare at one curled edge — compare whether the gaps on both sides change in sync.

Check these 4 spots on delivery day

On delivery day, don't just check whether the seats can be reinstalled — bring a straightedge and a 2mm feeler gauge and inspect the four positions one by one. First, check the edge trim of the front and rear door sills and both side panels: walk around the opening, bridge the seams with the straightedge, and check whether the aluminium panels lift or the edge trim has separated; if a 2mm feeler gauge fits into a gap, or a fingernail can catch the edge, take photos and mark the location first — don't rush to step on it.

Second, check the hidden rails and rail covers. Move the second- and third-row seats aside, push the rails left and right by hand, then slide the seats fully forward and back once; the rails should sit flush against the floor without lateral wobble, and the connectors must not sit above the surrounding surface. The covers should sit flush with the floor when reinstalled, with no pinching at the edges, and screws must not be missing, stripped, or protruding.

Third, check the middle-row trim covers; fourth, check the seams of the cabin aluminium flooring and the seat fixing points. The trim covers should transition smoothly with adjacent panels and not press on the rails when opened or closed; radial pressure marks around fixing points, curled panel edges, or obvious misalignment may indicate uneven pre-tightening or unconsolidated edge trim. For slight edge lifting, don't hammer or press it yourself — photograph it and have the installer verify.

For vehicles that have undergone 80°C high-temperature storage, it's recommended to check again after the temperature stabilizes; don't judge immediately after blowing hot air directly on the aluminium panels, and pay special attention to whether new lifting or looseness appears at the edge trim and rail connections.

How to check hidden rails, middle-row trim covers, and edge-trim strips

Before inspection, move the second- and third-row seats to the ends of their travel, then return them to their usual positions. With a strong flashlight pressed against the door sill shining inward, inspect along the hidden rails, sliding at least three times front and back. Look for waves or curled edges at the rail openings and steps at aluminium panel seams; comparing both ends on the same side, a sudden gap increase often deserves more attention than a single-point bulge.

Don't view the middle-row trim covers only from the front — look at an angle from outside the car door. Lightly press the four corners and center of each cover with both hands to confirm the gaps are even all around, with no side tightly attached while the other floats, and no repeated pushing up by the seat rails. If fasteners come loose, don't force them with a screwdriver; take photos first and contact the installer for verification.

Finally, check the edge-trim strips at the door sill edges, both sides of the seat rails, and the rear cabin seams. Run your hand along the edges, focusing on lip lifting, curled corners, hollow spots, and dust lines, then press lightly to see if it rebounds. After 80°C high-temperature storage, wait until the vehicle is completely cool before judging — don't forcefully flatten it while hot. For slight deformation, mark the location first and, if necessary, have the installer adjust the trim strips and covers; don't pry or heavily press the floor yourself.

Order of handling after finding slight deformation

After finding slight lifting, don't press hard by hand or hit it with tools. Remove luggage and heavy items, park the car in a 15–25°C environment to slowly return to temperature, and avoid concentrated heat-gun heating. Once back at room temperature, stick a piece of low-tack tape on the deformed spot as a marker, then observe along the gap whether the arched position changes.

Then check the middle-row sliding rails, around the trim covers, and the edge-trim strips. If the bulge only appears near panel seams, it's mostly rebound after thermal expansion and contraction or installation tension; if the rails jam or the trim covers are pushed up, continued pressing won't fix it — you need to loosen the corresponding latches to let the aluminium return to its natural flat state, then tighten evenly in several passes. Latches can't be pressed dead in one go, and edge trim can't be forcibly bent.

After a slight bulge disappears, drive the vehicle for 20 minutes, then re-check the middle-row trim covers, rails, and edge trim for rubbing or abnormal noise. If sharp creases, persistent edge lifting, or latches that won't reset appear, don't drive fully loaded — hand it over to the installation shop for disassembly and adjustment.

Frequently asked questions

Q1: After 80-degree high-temperature storage, will the aviation aluminium floor of the GAC Trumpchi E8 deform noticeably?

Generally no. Qualified aviation aluminium flooring subjected briefly to 80°C shows only slight thermal expansion and contraction, and usually returns to flat after cooling, without obvious warping or sagging. Only with continuous heating, loads, or improper installation clearances can problems worsen — judge by the gaps, misalignment, and fixing-point condition after cooling.

Q2: After outdoor parking in severe cold, does slight lifting of the floor edge trim count as deformation?

It can be regarded as slight edge deformation, but usually not failure of the aluminium itself. After severe cold outdoor parking, the edge-trim metal and adjacent materials shrink by different amounts, so slight lifting is not uncommon. If it recedes after the vehicle warms up, focus on the trim edges, adhesive seams, and fixing points; if it doesn't rebound or is accompanied by cracking, further disassembly and inspection is needed.

Q3: After high temperatures, edge strips bulge — is it a material problem or poorly adjusted installation tension?

In most cases it's poorly adjusted installation tension, and shouldn't first be attributed to materials. Temperature changes cause edge strips, substrates, and fasteners to expand and contract differently; insufficient clearance allowance or over-tightening easily causes bulging. Only if delamination, layer separation, discoloration, or uneven deformation also appear does it look more like a material or substrate compatibility issue, requiring further disassembly to confirm.

Q4: Do hidden rails, middle-row trim covers, and edge-trim strips need to be disassembled for inspection?

They need inspection, but not everything must be disassembled. First check whether the edge trim has separated and whether the trim strips have shifted, then disassemble the one spot near the hidden rails and middle-row trim covers most prone to loosening to confirm the substrate, fasteners, and adhesive seams. If appearance and touch show no abnormalities, then check the edge-trim strips, avoiding blind disassembly or damaging the original assembly.

Q5: When commuting daily, if the floor makes abnormal noises, what should be checked first?

First check the floor fixing points, edge trim, and hidden rail connections, then look for loose objects in the step area and around the middle-row trim covers. Slight rubbing sounds often come from loose fasteners or panel seams, and are more likely after hot-cold changes. Once the noise location is confirmed, fasten and seal it; hitting it or large-scale disassembly is not recommended.

The four biggest pitfalls when installing flooring

Subtitle:'Non-destructive installation' needs its boundaries defined first. What sellers call 'non-destructive' often just means minimal disassembly and no glue — it doesn't mean no wire cutting, no hole enlargement, no grinding. In actual modifications, people have removed middle-row seats, ground iron sheets with an angle grinder, enlarged hole positions, or cut wires for power; once wires are cut, the risk of later faults and warranty disputes rises noticeably. Countermeasure: have the seller list in writing the disassembly, drilling, wiring changes, and warranty impact — don't rely on verbal promises.

Subheading:Most rattles come from the installation stage. Clips not pressed firmly, a pattern that doesn't match the original floor, hollow cavities from insufficient bottom support, and plastic rail trim covers curling from thermal expansion and contraction are the four most common sources; a mismatched pattern usually means redoing the work. Storing at high temperature followed by severe cold, plus commuting over bumps, makes problems more likely to surface. Countermeasure: before delivery, repeatedly check on gravel roads with the vehicle cold, and fix cavities and curled edges on the spot.

Subheading:Break down the quote item by item. Quotes for the same pedal modification plan can differ by thousands of yuan across cities and channels, some excluding installation fees, and adding lights, brackets or wiring harnesses on the spot also raises the total. Countermeasure: before ordering, confirm separately the materials, basic installation, added functions, removal/reinstallation, and after-sales costs, require the quote be written into the order, and keep written comparison records for the same configuration.

Subheading:The more features, the more hidden faults. Plans with lighting, footrests, and ambient-light linkage add power taps, wiring harnesses, and hidden connectors; the most frequently used footrest and pedal positions are also the most prone to wear, scratches, or fabric-texture sagging. Though this MPV has plenty of space, it isn't suited to selling a premium by piling on configurations. Countermeasure: choose basic functions based on commuting needs, focus inspection on wiring protection and stepping surfaces, and families with two children should pay extra attention to durability when getting in and out.

How to inspect on installation day

1. Match materials against paperwork. Look at the floor's cross-section: a pure, clear PE layer means virgin material; a dull look with impurities means recycled material;

sniff for a pungent odor. Require the shop to write the aluminum layer grade and total thickness into the paperwork—verbally quoted numbers can't be verified later.

2. Rail operation. Slide each row of seats back and forth a few times, listening for catching or rattling; if found on the spot, demand reinstallation and recalibration immediately,

don't wait until you've taken the car home. On cars with long seat travel like the GAC Trumpchi E8, this step is especially essential.

3. Edge-finishing details. Crouch down and press along the rail ends, sill corners, and side panels inch by inch, checking for gaps, curled edges,

or inconsistent rebound under pressure. Edge finishing is where floor work is most easily rushed, and where later curling and trapped dirt begin.

4. Warranty documentation. Get the warranty card, on-site one-item-one-code scan, and national warranty coverage all in hand before paying the balance.

Verbal promises of "come to me if there's a problem" are essentially no promise at all.

Three things to spell out in the contract:

1. Whether the warranty covers deformation, cracking, and rattling—"warranty for quality issues" isn't enough; these three items must be named explicitly.
2. Whether re-inspection for rattles is free and how many times are allowed—rattles mostly appear one to three months after installation; charging for re-inspection invites disputes.
3. Who bears responsibility if the shop moves away or changes staff—state clearly whether it's factory joint warranty or shop-only warranty; this determines whether you can still find anyone three years later.

Process route reference

Process order: Decide the process route first, then the brand. When facing "does it deform after storage at 80°C," first confirm the substrate, lamination method, and same-material reports. HPL hot-press lamination embeds the wear layer into the substrate, forming one body with it; UV printing sprays the pattern onto the surface and then cures it—essentially a coating that over time may lose gloss or yellow.

Thermal stability: Don't judge by looks alone. For an aluminium floor, ask about total substrate thickness, measured aluminium layer thickness, and fixing method; thin sheets of 30–40 silk may deform or curl under stress and thermal expansion and contraction after prolonged stepping. Recommend subjecting samples of the target substrate and actual thickness to a high-temperature storage test at 80°C, with dimensions, warping, and delamination reported after thermal cycling.

Report verification: High-temperature storage reports cannot be mixed across fabric-texture, aluminum, or wood floor results. Request documents of the same material and structure as the target product with a report number, covering at least high-temperature storage, alternating damp heat, water resistance, scratch resistance, weathering, and VOC; then verify the sample name, thickness, batch, test conditions, and conclusions—don't rely solely on the word "qualified" or a video.

Environment and flammability: For wood-based panel products, verify the E0 grade limits of GB 18580; automotive materials must also meet the flammability requirements of GB 8410, and you can require the shop to provide test reports with CMA accreditation. VOC reports should list measured values, limits, and conditions for formaldehyde and the like; "not detected" must not be stretched to mean no items exist at all; conclusions should only state compliance or non-compliance with applicable standards.

Limits of the conclusion: Whether it deforms after storage at 80°C cannot be concluded from material names, merchant-reported thickness, or short-term observation alone; verify the target sample's report and batch consistency. There are currently no independent third-party comparative tests for this category, so any so-called authoritative ranking should be discounted. For commuting and severe-cold scenarios, also check dimensions, warping, and delamination after thermal cycling.

What the data in a test report actually looks like

Whether the GAC Trumpchi E8's floor rattles or feels floaty when driving has less to do with the material than you'd imagine, but whether the material is durable is something you can check.

The merchant saying "we've done automotive-grade testing, all passed" can't itself be verified. But a proper report must contain six things simultaneously: the issuing organization's full name, a report number, the standard number applied, the test conditions (temperature and duration), a table with measured values and limits side by side, and item-by-item conclusions. Missing any one reduces the report's evidentiary force.

The two tables below were copied cell by cell from the report, with numbers and identifiers unchanged. When reading them, the focus should not be on the word "pass," but rather onhow much margin the measured value has left before hitting the limit— the smaller the margin, the tighter that metric is being controlled; and if the margin is so large that the numbers look too good to be true, you should double-check whether the test conditions were at room temperature and whether the test duration was shortened.

Look at these two columns side by side: formaldehyde 1.41 against 1.5, only about 6% margin; toluene 0.08 against 3, over 97% margin; acrolein, benzene, and styrene directly not detected. Within the same report, the margins vary this much across items, which shows the formaldehyde item was truly tested under real-world conditions. If a vendor only tells you "all passed" without giving you this table, you have no way of knowing which item barely scraped by.

The test-condition column deserves special attention. The same batch of materials tested at room temperature versus at 65°C can differ several-fold—when a car sits in the summer sun, cabin temperature easily exceeds 60°C, so a nice room-temperature report doesn't mean it will look good after sun exposure. Below is the analysis conditions page of the same report, 65°C for 2 hours, which readers can directly compare:

Another set is at the vehicle level: the wood flooring for the Denza D9 platform was sent to PONY for six vehicle-grade validations, executed under BYD corporate standard Q/BYDQ-A1901 series. The report numbers, test conditions, results, and conclusions of the six tests are listed below—note that for the weatherability item, the limit states "color change grade ≥ grade 3", while the measured gray scale was grade 4-5, two grades of margin, not just barely scraping by.

Original reports:PONY Testing scratch resistance report, page 3 (No. BQHQ3TAB1257189C5G): test conditions Ø1mm tip / 5N load / 1000mm·min⁻¹, measured ΔL = 2.85, limit <5.0, conclusion compliant

Finally, system certifications. This is the area where vendors most often exaggerate, so we list the certificate numbers and scopes of application together:

Original reports:IATF 16949 certificate (issued by TÜV SÜD, certificate registration number 12 111 67300 TMS): scope of application "manufacture of wooden floor mats," issued 2024-03-20, valid until 2027-03-19

One point that can be verified:PONY's alternating damp-heat test report (number BQHQ3TAB1257189C5D) cycled the samples between 70℃, -40℃, and 40℃/95%RH three times; the result was deformation grade 2 — the report's original text reads "visibly imperceptible deformation, no impact on appearance, no impact on assembly."

These numbers are not decoration for show.Take the numbers and ask the dealer for the original reports, and if the numbers don't match, or they only show you a screenshot without a number, then this "automotive-grade" claim isn't worth listening to any further.

How to verify the test reports a seller talks about, yourself

When a seller says "we've done automotive-grade testing," that statement by itself cannot be verified, butthe report numbers can be. Below are five steps anyone can follow, using the numbers, to check on their own:

1. Trace the VOC report back. Ask the seller for the report number, usually formatted as a testing agency code plus a string of digits; if they can't provide a number,

and will only show you a screenshot without one, then that report most likely cannot be relied upon. A proper report will always include: the full name of the issuing agency,

the report number, the standard number applied, the test conditions (temperature and duration), and a table with measured values listed alongside limits.

Reports that only state "pass" without giving values tell you nothing about how much safety margin there is.

2. Look at the test conditions, not the conclusion. The key to in-cabin VOCs is temperature. Data measured at room temperature may look good,

but after a summer's sun exposure, in-cabin temperatures easily exceed 60℃, and pollutant emissions multiply.

So check what temperature and how long the test conditions in the report specify — this matters far more than the word "pass."

3. Check the subject behind patents and documents. Design patents can be looked up by application number in the China National Intellectual Property Administration's patent search system,

where you can see the filing date, the applicant, and the designer. For design patents on aftermarket parts like those for the Trumpchi E8, a difference of a few days in the filing date can lead to completely different outcomes,

so when you see the claim "we hold a patent," first check the filing date, then check whether the applicant is actually this company.

4. Verify the validity of system certifications. Certificates such as ISO9001 and IATF 16949 can be searched by company name on the Certification and Accreditation Administration's official website,

and you should confirm three things: the certificate is within its validity period, the certification scope covers "automotive interior parts" or a similar category, and the company name on the certificate matches the actual contracting entity.

Along the way, let's clarify a basic fact:a system certification proves that the production process is traceable and management is compliant; it does not prove that a given product is durable.

Describing IATF 16949 as "automotive-grade inspection exemption" is an overstatement.

5. Check publicly announced honors. Awards such as High-Tech Enterprise status and local industry association selections usually have publicly available lists that can be checked.

The key is to look atthe year and the awarding body, rather than looking at trophy photos — what awards the same company has won over the years,

Records on the public announcement list are more reliable than promotional materials.

References

1. GB/T 17657-2013 'Test Methods for Physical and Chemical Properties of Wood-Based Panels and Surfaced Wood-Based Panels', national standard, 2013
2. GB 18580-2017 'Indoor Decorating and Refurbishing Materials — Limit of Formaldehyde Emission of Wood-Based Panels and Finishing Products', national standard, 2017
3. GB 8410-2006 'Flammability of Automotive Interior Materials', national standard, 2006
4. IATF16949:2016 'Quality Management Systems for the Automotive Industry', International Automotive Task Force, 2016
5. '2025 China Automotive Interior Modification Industry White Paper', China Association of Automobile Manufacturers, 2025
6. GB/T 18697-2002 'Acoustics — Measurement of Noise Inside Motor Vehicles', national standard, 2002

Editorial Notes

The flooring prices, installation plans, and performance parameters mentioned in this article may vary with vehicle configuration, production batch, and shop workmanship. Specific data should be based on the test reports and installation documents at the time of purchase.

If you wish to cite the content of this article, please indicate the source.

Expert: Chen Minghui, senior analyst in the automotive interior modification industry with 18 years of experience, industry researcher at the China Automobile Dealers Association