Lotobear 8 Posted September 7, 2020 Report Share Posted September 7, 2020 I keep my undertray bolts copper greased but each time I remove them I see the effects of electrolytic corrosion on the aluminium trays and was thinking - has anyone put together a stainless bolt set? ....not only would they look good but they would remove the lingering concerns over seized bolts and corroded aluminium 1 Quote Link to post Share on other sites
Gold FFM C8RKH 6,254 Posted September 7, 2020 Gold FFM Report Share Posted September 7, 2020 This may help https://www.lotustalk.com/threads/heres-whats-in-a-full-stainless-steel-hardware-kit.409417/ Quote Alcohol. Sex. Tobacco. Drugs. Chocolate. Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies! The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts! Link to post Share on other sites
#84 17 Posted September 7, 2020 Report Share Posted September 7, 2020 I did the opposite, went for Aluminum screws with big rounded head for minimized drag and weight Sorry, not in English, but you get the principle: https://www.carbix.se/product.html/aluminiumskruv-kullrig Quote Link to post Share on other sites
au-yt 485 Posted September 8, 2020 Report Share Posted September 8, 2020 Forget what google will tell you don’t put stainless and aluminium together especially in any moisture type environment dissimilar metal corrosion is the result. 304 stainless is especially bad. I’ve seen stainless turn to a black almost grease Type substance when bolted to aluminium in a drain water sump and it’s also a no no around swimming pools. If you do use stainless bolts you need to use a nickel based anti seize. Quote Link to post Share on other sites
Gold FFM C8RKH 6,254 Posted September 8, 2020 Gold FFM Report Share Posted September 8, 2020 You can use a plastic paper thin washer between the stainless and aluminium can you not to avoid the physical contact point. Quote Alcohol. Sex. Tobacco. Drugs. Chocolate. Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies! The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts! Link to post Share on other sites
Bibs 11,158 Posted September 8, 2020 Report Share Posted September 8, 2020 https://www.mbfg.co.uk/duralac.html Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
Nelly 186 Posted September 9, 2020 Report Share Posted September 9, 2020 I am in the process of removing my undertray so I can remove the 3rd cat and fit a straight through pipe. I think the rust even surpasses what I have seen on my Esprit. Shit the bed what a job to get it off, I am having to cut them with my dremel as the bolts are solid. With them being hex head as well doesn't help (although one did bite enough to actually snap one of the captive nuts off of the plate it was welded onto) - very helpful. Wheel off to get to that! Quote Link to post Share on other sites
DarrylV8 226 Posted September 17, 2020 Report Share Posted September 17, 2020 Always used Vaseline when using two dissimilar metals, and copper grease on the back of brake pads. Quote Darryl & Sue Proud to drive and own a true British supercar the Evora GT430 Link to post Share on other sites
Bibs 11,158 Posted September 17, 2020 Report Share Posted September 17, 2020 28 minutes ago, DarrylV8 said: Always used Vaseline when using two dissimilar metals Duralac is the correct product to prevent galvanic corrosion. https://www.mbfg.co.uk/duralac.html I'd imagine vaseline would get washed away by water very quickly after application. 1 Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
EGTE 145 Posted September 18, 2020 Report Share Posted September 18, 2020 Have just ordered and put Duralac on mine, thanks for the tip, Bibs. 1 Quote Link to post Share on other sites
Julian73 153 Posted September 23, 2020 Report Share Posted September 23, 2020 On 07/09/2020 at 08:23, Lotobear said: I keep my undertray bolts copper greased but each time I remove them I see the effects of electrolytic corrosion on the aluminium trays and was thinking - has anyone put together a stainless bolt set? ....not only would they look good but they would remove the lingering concerns over seized bolts and corroded aluminium I went with SS button hex-head machine screws and use USS Tef-Gel PTFF anti corrosion paste. Tef-Gel is also good for insulating CF products from SS screws and aluminum. https://www.tefgel.com/contain.php?param=tefgel_infor Quote Link to post Share on other sites
Nelly 186 Posted September 27, 2020 Report Share Posted September 27, 2020 OK, after five Sundays I have finally got the under tray off. I had to butcher eight of the bolts to get them off so ordered some replacements. I went for black stainless steel bolts from Carbolts: https://www.carbolts.co.uk/collections/bolts/products/black-stainless-steel-button-flange?variant=8135052329078 But having read the above, not sure what I should be doing. Am I better off using the stainless bolts I have just got using one of the products mentioned, or with factory steel bolts with some copper grease? To add insult to injury, I was doing this to put a decat pipe on the car but having got the diffsuer off found it had already been done. Not sure what I was most upset about, all that wasted time or the fact the sound of the car won't be improving. 1 Quote Link to post Share on other sites
Julian73 153 Posted September 29, 2020 Report Share Posted September 29, 2020 Stray away from copper grease, this will not prevent corrosion infant it will an electronic path. Better to use a product such as USS Ultra Tef-Gel Quote Link to post Share on other sites
jerzybondov 50 Posted September 29, 2020 Report Share Posted September 29, 2020 On 27/09/2020 at 21:25, Nelly said: To add insult to injury, I was doing this to put a decat pipe on the car but having got the diffsuer off found it had already been done. Not sure what I was most upset about, all that wasted time or the fact the sound of the car won't be improving. Does this mean you've got a decat pipe going spare? Interested if so! Quote Link to post Share on other sites
Nelly 186 Posted September 30, 2020 Report Share Posted September 30, 2020 @jerzybondov - Yes I do, it was going to go up on the classifieds at the weekend. Will drop you a PM Quote Link to post Share on other sites
Tris... 125 Posted October 2, 2020 Report Share Posted October 2, 2020 On 29/09/2020 at 17:20, Julian73 said: Stray away from copper grease, this will not prevent corrosion infant it will an electronic path. Better to use a product such as USS Ultra Tef-Gel Great stuff Tef-Gel, use it all the time on high tech racing boats especially between carbon and aluminium. Sticky as hell so don’t get it on your clothes. Quote Link to post Share on other sites
Spinney 709 Posted October 18, 2020 Report Share Posted October 18, 2020 Out of interest, I fitted some of these anodised aluminium screws in place of the standard ones on the under tray of both my Elise and Exige. Never had a corrosion problem with them after that. https://www.ebay.co.uk/itm/M5-Aluminium-Socket-Cap-Screws-Allen-Key-Bolts-Hex-Head-Anodised-Unanodised-/282771602905 If you want to be a complete tart (ok I’ll hold my hand up) you can choose a colour to almost match the cars bodywork. 1 1 Quote Link to post Share on other sites
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