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Sealing cases

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Guest

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What should I use to seal my cases? That blue Permatex stuff or what? Somebody should make a list of what product should be used in each area of the motor, cases, valve cover, etc

Paul
 
Re: Sealing cases

nastyjones said:
What should I use to seal my cases? That blue Permatex stuff or what? Somebody should make a list of what product should be used in each area of the motor, cases, valve cover, etc

Paul
Click to expand...

Yamabond works for me on the cases. Try not to use too much silicone. Its will plug up the oil holes unless you just put it on your fingers and kinda rub the the gasket and get a real light coat.

(-:

JGordon
 
Use new gaskets. That's all you need.

DO NOT apply sealer or silicone goop if you can help it.

If you have a really bunged up part, a VERY thin see-through coat applied ONLY to the affected area can help. You can also use very, very small amounts of Hylomar non-hardening sealer.
 
My main question concerns the cases, though. There is no gasket there.

Paul
 
That Yamabond is what has been suggested to me before for the cases. No gasket between the case halfs folks.

I disagree with not using silicone on the top end gaskets. Suzuki says to use it, so I use it. The manual is my bible, the engineers my gods. Do not anger the gods.
 
Stay away from that blue permatex crap for the cases. Use '3-bond', same kinda stuff as 'yamabond'. 3-Bond you should be able to get at most parts stores, yamabond you can get at your local yamaha dealer.
For a sealant on the gaskets I use Loctite 515. (grape jelly some call it) Works real good.
 
Has anyone used "motoseal" by Permatex. It's supposed to be for specifically for sealing motorcycle crankcases.
 
Re: Sealing cases

nastyjones said:
What should I use to seal my cases? That blue Permatex stuff or what? Somebody should make a list of what product should be used in each area of the motor, cases, valve cover, etc

Paul
Click to expand...

I have always used a product called Threebond 1104 liquid gasket. It's a "semi-drying" formula that has been suggested to me by severall top motorcycle technictions. It's identicle to Yamabond (I've been told it's exactly the same sealant). I've used it on 2 and 4 stroke crankcases. Smear a THIN bead across one of the mating surfaces, and bolt the cases together, and you are good to go.
Rich
 
I'm sure that no one wants to hear that a pair of aircraft piston engine case halves are assembled with nothing but a #50 silk thread... trailing around the entire perimeter of the mating surface, and encircling all bolt and dowel holes. (A bottle of prozac for the installer comes in handy afterwards to help stop the finger shake).
 
Actually, thats a great tip. Sometimes, things go awry on the road and no gaskets are to be found. For a pinch, and gotta get'er going, I'll remember the thread trick.

Earl

DaveDanger said:
I'm sure that no one wants to hear that a pair of aircraft piston engine case halves are assembled with nothing but a #50 silk thread... trailing around the entire perimeter of the mating surface, and encircling all bolt and dowel holes. (A bottle of prozac for the installer comes in handy afterwards to help stop the finger shake).
Click to expand...
 
earlfor said:
Actually, thats a great tip. Sometimes, things go awry on the road and no gaskets are to be found. For a pinch, and gotta get'er going, I'll remember the thread trick.

Earl

DaveDanger said:
I'm sure that no one wants to hear that a pair of aircraft piston engine case halves are assembled with nothing but a #50 silk thread... trailing around the entire perimeter of the mating surface, and encircling all bolt and dowel holes. (A bottle of prozac for the installer comes in handy afterwards to help stop the finger shake).
Click to expand...
Click to expand...

What exactly is "#50 silk thread" ?
 
Re sealing cases

Re sealing cases

I had a problem with a torn gasket after freeing up a stuck clutch. Only thing I had available was Loctite Gasket Eliminator 51580. Had very little choice but to try it on the clutch cover, only done about 100kms since the temporary fix, but no leaks whatsoever. Like most people here say, as little as possible to just cover one side of the mating surfaces. So far so good.
Gerry
 
Road_Clam, #50 silk thread is a silk thread of a specific diameter. Sometimes referred to as "00" or double-ought. As best I remember, it's about .015" in diameter. Many of the engine overhaul shops are beginning to add a tiny amount of permatex gasket adhesive to one case half to help hold the thread in place while the pieces are assembled, but the thread itself does the work. Silk thread is very strong and keeps it's body structure very well even when torqued in place. I have noted before when disassembling engines that a slight indentation or groove is visible in the mating surfaces from the silk thread being crushed into place.
 
Yea what JGordon said. Yamabond is great. Just make sure you don't use too much as it will seal off oil and bolt holes.
 
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