Alex Lowe Posted May 10, 2020 Report Share Posted May 10, 2020 Hi all So iv had a few drops of oil leaking for my engine in the GT6 and slowly trying to trouble shoot the problem. which iv defiantly got a leak from the rocker cover gasket which i replaced recently with a new silicon version yeah still leaks anyone got any suggestions on how to rectify this? Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 10, 2020 Report Share Posted May 10, 2020 tin cover or alloy ,???? you cant use a silicon version on a tin cover that needs to be cork/rubber std seal and carefully fixed located to stay in place when fitting eg try glue or sealer and weighted down to firmly set the seal onto the tin cover face . the silicon joint will only be successful on a machined flat face Pete Link to comment Share on other sites More sharing options...
Alex Lowe Posted May 10, 2020 Author Report Share Posted May 10, 2020 Im surprised by this as the one I bought linked below states it shouldn't need sealer and should be fine in standard covers. If I do require sealer whats recommended https://www.ebay.co.uk/itm/REUSABLE-Triumph-GT6-Vitesse-TR5-TR6-2000-2500-SILICONE-STD-Rocker-Cover-Gasket/222420535772?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Link to comment Share on other sites More sharing options...
Paul H Posted May 10, 2020 Report Share Posted May 10, 2020 8 minutes ago, Alex Lowe said: Im surprised by this as the one I bought linked below states it shouldn't need sealer and should be fine in standard covers. If I do require sealer whats recommended https://www.ebay.co.uk/itm/REUSABLE-Triumph-GT6-Vitesse-TR5-TR6-2000-2500-SILICONE-STD-Rocker-Cover-Gasket/222420535772?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 That looks a high price even with postage. What thickness is yours ? the silicone one I purchased for my Vitesse with alloy cover is 1.6 mm and the cork one approx 5 mm Paul Link to comment Share on other sites More sharing options...
Alex Lowe Posted May 10, 2020 Author Report Share Posted May 10, 2020 Yeah it does i purchased it last year and it wasn't that expansive then thickness i would say its about 5mm from memory Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 10, 2020 Report Share Posted May 10, 2020 this looks like the one the club sells and i was involved and garth got some made when that was first thought of, i would be surprised if it has the compliance to work with a wonky tin cover and its folded flange pete Link to comment Share on other sites More sharing options...
Alex Lowe Posted May 10, 2020 Author Report Share Posted May 10, 2020 will sealant fix this problem tho? if so will any old gasket sealant do? Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 10, 2020 Report Share Posted May 10, 2020 well, sealant can solve lots of leaks , remember you may need to take the cover of for tappet servicing so it needs to be removable not glued to the head so hence suggest sealer on the cover leave the head face clean . how the silicon seal works is very dependant on the thickness of the seal and the state and flatness of the cover , tin covers after 50 years can be quite distorted and even when new the old thick cork type was designed to take up undulations and be squashed down well by the fixings pete Link to comment Share on other sites More sharing options...
Bobtaylor Posted May 10, 2020 Report Share Posted May 10, 2020 There are 2 different types of silicon gasket available. One flat the other for the original tin cover (I have one and it works fine). Bob 1 Link to comment Share on other sites More sharing options...
SpitFire6 Posted May 10, 2020 Report Share Posted May 10, 2020 (edited) I use: SPQR Tappet Adjuster. Edited May 10, 2020 by SpitFire6 wrong Forum. lol Link to comment Share on other sites More sharing options...
JohnD Posted May 10, 2020 Report Share Posted May 10, 2020 Alex, Your copy is only pressed out steel, pretty flexible and prone to twisting. Get it off, remove the gasket and lay it on a flat surface. A table is fine. See if the cover is flat on the table. If not, 'tweak' it until it is. With lucjk, this will distribute the load frm the cover nuts more evenly and make a seal. JOhn Link to comment Share on other sites More sharing options...
Clive Posted May 10, 2020 Report Share Posted May 10, 2020 And don't forget to flatten the stud/bolt holes for the cover. They are often get pulled. Easy to flatten, turn the cover upside down, and I use a socket extension as a drift and hammer flat. Really helps, especially the seal around the stud/bolt. But the biggest issue is, as John points out, deformation. I find the kitchen worksurface very flat Link to comment Share on other sites More sharing options...
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