Sooty Posted July 15, 2020 Share Posted July 15, 2020 Which gasket sealant. Just fitted a new sump on my Crossflow and as advised by manufacturer these were dry fitted . Got a leak which I think is between the cork gasket and the half moon crank seals. What is the best gasket sealant. Going to replace the cork with controlled swell twin laminate competition gasket so want to make sure there is a seal between the sump rail and the half moon gasket Link to comment Share on other sites More sharing options...
Silver Machine Posted July 15, 2020 Share Posted July 15, 2020 Have used PRO SEAL instant gasket. OK up to 260 degrees C. Comes in 85g tubes in various colours. Says it can be used to replace original cork, felt,paper,rubber and composite gaskets. I have never used it on the sump but it has fixed similar problems to yours in other locations. Link to comment Share on other sites More sharing options...
elie boone Posted July 15, 2020 Share Posted July 15, 2020 I use Loctite SI5910, also fill up the space between half moon and sump front & rear of the engine. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted July 15, 2020 Share Posted July 15, 2020 Loctite 5910 is a very good RTV sealer easy to control the flow to with the Sardine key on the tube. Link to comment Share on other sites More sharing options...
Roger King Posted July 15, 2020 Share Posted July 15, 2020 They always leak!I had a bit of a shock after leaving Dealer Team Vauxhall and going back to work on Ford's engines. We only ever fitted the sump gaskets to the Vauxhall lump in the Chevette with a little smear of green Hermetite on the block face - and that was for the sole purpose of ensuring that if the lads had to drop the sump during an event, the gasket would stay in place and not need changing. They never leaked.Ford sumps on the other hand? Let's just say that a sparing application of RTV is de rigueur. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted July 15, 2020 Share Posted July 15, 2020 Euro car parts have 300ml 5910 on offer at £17.99 Link to comment Share on other sites More sharing options...
7 wonders of the world Posted July 15, 2020 Share Posted July 15, 2020 Linky:https://www.eurocarparts.com/p/loctite-loctite-5910-high-performance-silicone-black-gasket-300ml-554770500 Link to comment Share on other sites More sharing options...
Doctor Posted July 20, 2020 Share Posted July 20, 2020 I would suggest Loctite SI 5980 Link to comment Share on other sites More sharing options...
Toby S Posted July 20, 2020 Share Posted July 20, 2020 Anyone tried Permatex Copper silcone gasket - Never tried it myself, but have heard good reports at high temperature joins Link to comment Share on other sites More sharing options...
Silver Machine Posted July 20, 2020 Share Posted July 20, 2020 American review of gasket sealants so actual brands may not be relevant. Explains different types and how to use/apply. Thought it might be of interest.https://www.thedrive.com/reviews/31242/best-gasket-sealer Link to comment Share on other sites More sharing options...
timb2117 Posted July 21, 2020 Share Posted July 21, 2020 Sorry if this sounds like I am belittling you but its a trick I only learnt recently from an old pro - whenever doing a gasket lightly press it together and let it sit for about 10 mins (assuming a touch dry seal is at about 30 mins) then go through your tightening procedure, otherwise the sealant just gets pressured out and doesn't....seal that is :) Link to comment Share on other sites More sharing options...
Toby S Posted July 21, 2020 Share Posted July 21, 2020 Good tip Tim Link to comment Share on other sites More sharing options...
elan_fan Posted July 26, 2020 Share Posted July 26, 2020 A well respected member on the Elan forum recommends permatex no.3 aviation gasket sealant for the cork gasket. Paint it on and leave to go tacky then stick to the block and paint the other side and when tacky bolt up the sump. The sump flange bolt holes must not be distorted. The neoprene gaskets are sealed with permatex ultra copper.Best regards Mark Link to comment Share on other sites More sharing options...
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