Gasket Cements

Shipper

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Generally, and in particular on surfaces like the oil filter panel, I would just use a thin film of engine oil on the gasket before torquing to spec. Lately Ive been reading a lot about cements good and bad. For instance, the plate that covers the starter motor gears appears to require more than oil.

What is the preferred choice for such surfaces. And i also need confirmation of the sealer used when I put the casing back together.

Thanks again,

Stay well riders.
 
I've never found it necessary to cement the gasket on the starter gear plate, just installed it dry and put even pressure on the screws with an inch pound torque wrench. Permatex copper Spray-A-Gasket is my go-to gasket dressing; it releases well when it's time for things to come apart. Three Bond 1184 (AKA Yamabond #4, Hondabond #4, etc.) is what you want on for metal-to-metal joins like the rocker box and crankcase. It replaces Three Bond 1104, which is discontinued.
 
I use red grease on normal gaskets, Permatex copper on head gaskets and Yamabond on cases.
If you really want to seal it and have no designs on ever taking it apart again us this. The next guy will not just cuss you he may try to find you.
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If you're using gaskets you don't need sealers. If there is no gasket, like with the case halves, you can use a bead of Permatex Motoseal gray, which is like Yamabond, etc. but is easier to find and has a long working time.
 
Actually no, I just oil mine, but I might try that anti-seize tip next time. I do use it on the motor side of my alt. cover. The cover side gets stuck on the cover with sealer (so it comes off with it) .....

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lol, whoever thought of it it's a great idea. It's easy to break that gasket while tugging on the plate
 
I use red grease on normal gaskets, Permatex copper on head gaskets and Yamabond on cases.
If you really want to seal it and have no designs on ever taking it apart again us this. The next guy will not just cuss you he may try to find you.
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Not 650 related but on my VW beetle engine, some suggest to use the Indian head gasket shellac. Does it really stick that well? The application will be to seal two crankcase halves together that do not have a gasket.
 
From my limited experience with it many years ago it is like super glue for gaskets. Like a lot of things there are times it's the best thing to use and times when not.
I'll check with a friend of mine that has done a lot of work on VWs about sealing the case halves.
 
From my limited experience with it many years ago it is like super glue for gaskets. Like a lot of things there are times it's the best thing to use and times when not.
I'll check with a friend of mine that has done a lot of work on VWs about sealing the case halves.
Thx. I believe Hylomar sealant is one of the recommended materials, others say use an RTV type sealant. I’ve used Dirko on crankcase halves of small engines. As usual I’m probably overthinking this. I’d be interested in what your friend had to say.
 
I like non hardening aviation gasket sealer for those joints that tend to seep. It works the charm and comes off when required. It comes in a few different brand names. Make sure it's "non hardening."
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I like non hardening aviation gasket sealer for those joints that tend to seep. It works the charm and comes off when required. It comes in a few different brand names. Make sure it's "non hardening."
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just keep it away from fuel systems, dissolves in gasoline.
 
For crankcase ,metal to metal joints I have been using Locktite 518 and have been pleased with the results. Normally I use a thin coat of Halomar on gaskets or dry. On some gaskets which are prone to leak I have been using marine bellows sealant https://www.amazon.com/MERCURY-92-86166Q-1-Bellows-Adhesive/dp/B001HX9WVM. Stuff does a good job sealing. Its kinda like the permatex form a gasket.
 
Thx. I believe Hylomar sealant is one of the recommended materials, others say use an RTV type sealant. I’ve used Dirko on crankcase halves of small engines. As usual I’m probably overthinking this. I’d be interested in what your friend had to say.
My friend got back to me. He likes Loctite 518. It's a anaerobic sealer. He also said there is no one sealer that people agree on (imagine that). Some use RTV type, some like Yamabond type others use shellacs like Indian Head and probably a few others.
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With RTV it tyends to squeeze out and form beads along the joints. Tese beads can come loose and float around in the oil. Will those beads plug up oil passages? I think they can and I won't use it for the cases.
When applying the Three Bond it can run down the case, If it does it dries into a thin film and stays put.
On other gaskets I use Anti-sieze. It works very well at keeping gaskets from stixcking to parts.
Leo
 
Right, the old 1104 formula (now discontinued) would just run down like paint if applied a bit too thickly, but I've noticed that the current product (1184) can clump. It's not as bad as RTV that way, but it's best to keep the coat thin, as per instructions.
 
Just don't do this. What you see is too much sealant. That groove is supposed to be an oil passage that was 90% plugged( there was not supposed to be sealant there in the first place). Took me hours to clean out all the sealant that was in an engine that had lubrication issues(2002 GSXR1000). The 518 sealant cures in the absence of air and the small amount that gets squeezed out will not cure and gets mixed with the oil(so I was told). Either way it still should be spread as thinly as possible. With the 518 you have time to work with it, not like Honda bond and the equivalents. The 518 also comes in a tube with a sponge roller and works good with thicker flanges.
GSXR1000 sealant nightmare.jpeg
 
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