2 stroke gasket. WHAT DO YOU USE?

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Hurco550

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Just as the title states, what liquid gasket do you use? I am currently working on a GT250 rebuild. I am a snowmobile guy and we always use three bond on the snowmobile engines. What do you guys use on your engines for your smokers? Any thing you recommend more or that you think I should shy away from? thanks guys!
 
Permatex gray for cases never naked on heads and bases (cant with water) OE if i can Cometic if not light dust with copper both sides let dry on base.
 
to seal of my RD cases i used red threebond mass.the bast way to apply it is using a brush.be sure not to use a lot.just a fine layer.
degrease the mating surfaces and youre good to go.
 
I use 6 things for 99% of everything. They are all almost always back on my bench straight away after cleaning up!

3 bond - or Yamabond - or Hondabond. (forget the #s for the Yamabond and Hondabond but think it is #4 for the Yamabond) No functional difference I can tell. I use on crankcase halves, sometimes 1 side of cylinder base gaskets if there are sealing issues to glue it solidly in place. One side of side case gaskets that I want solidly glued in place, etc.

Hylomar. For things that come apart a lot that I don't want to scratch or may need to re-assemble without additional application of sealant. Reed cage gaskets. Expensive but awesome.

Loctite #518. For things that come apart hardly ever that I want to be able to clean up easily like case halves. Other side of cylinder base gaskets that have issues. etc. Good for difficult assemblies where 3 bond dry time is an issue. One of the absolute best hi tech compounds.

#2 white marine grease. For the other side of side case gaskets etc.

Copper coat in a spray can. For copper gaskets that need help, or copper gasket designs or applications that need help.

Blue and red loctite threadlocker. Not just to keep bolts from vibrating loose. For sealing some kinds of threads, reducing wear clearance on things like roller bearing races. etc.
 
Sounds like a good solid list JP... I use the Yamabond sparingly for sealing up marginal surfaces that I cant rub on the rock to clean up all of this stuff is spendy and suject to adverse conditions here until I get controlled HVAC this spring ::) so I don't buy much more consumables than I can afford to toss if it goes bad from Hot cold hoter colder.
 
Haha. . .right! not sure which is worse, buying more consumables because they go bad when you didn't realize it or buying more because you ran out in the middle of working on something or even worse forgot you used it up on the last project! I do know one thing, that white marine grease lasts a long long time on the shelf!

Hope no one thinks I was promoting that one needs all these things - mostly some 3-Bond, the White #2 marine grease and some blue loctite are all you need! These days there are lots of ways to get the job done and I am sure others have their own preferences. I've been using these things for quite a while so maybe there are better alternatives. Old habits die hard!
 
loctite/permatex 518 is far superior to 3 bond or any other for that matter,the bonus being it is anerobic, AND works as a medium thread locker and thread sealant, it is really the only sealant you need
head gaskets should always go dry no sealant
 
xb33bsa said:
loctite/permatex 515 or 518 is far superior to 3 bond or any other for that matter,the bonus being it is anerobic, AND works as a medium thread locker and thread sealant
Click to expand...

Yeah I knew it was gonna be... Whiskey, Bourbon or Scotch HAHA
 
xb33bsa said:
loctite/permatex 518 is far superior to 3 bond or any other for that matter,the bonus being it is anerobic, AND works as a medium thread locker and thread sealant, it is really the only sealant you need
head gaskets should always go dry no sealant
Click to expand...
I say not necessarily so.

It depends on the application. 518 is NOT especially good for bonding gaskets in place. Actually one of its more endearing qualities when taking things apart. 3 bond often works acceptably for this. I have had high pressure applications that sealed up fine at first with 518, but later the gasket got pushed out. No question this was an exceptional application, and the mechanical clamping of the parts was not ideal, just saying it is not universally true.

I have never used 518 as a thread locker, but I will try it now. Should work fine - can't believe I never thought of it (if it says anything on the tube about thread locking I don't want to know) Man, I will be sending you a bill for the lost bits if it doesn't work! ;)

I say not so about the head gaskets either. Some 2 cycle heads even stock (arguably poorly engineered) are very hard to seal even with perfectly lapped surfaces and flawlessly annealed gaskets assembled dry. Increase the output and you actually have a problem. Gluing it together with spray copper coat is a solution - though have to admit I was in the dry head gasket camp for many years. Still seems kind of hacky to me, but it works.
 
Thanks for all the great info guys, have nothing to add besides that I am reading ALL of your advice and I appreciate all the input. This is where this forum shines, a question is asked and a wealth of info passed on! I sure appreciate it.
 
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