064 external crankcase seal oil leak

oaky · Feb 13, 2019

got a oil leak on the crankcase seal under where the muffler lives.
haven't pulled the jug yet to see whats going on inside but the rest of the seal looks good.
if it is all good except that little spot id be kinda nuts to crack the case.. what would be a good option?

some type of head gasket rtv sealant?

you can see a bubble there

ManiacalMark · Feb 13, 2019

Did you check the case bolts? That could be your temporary fix because you will have to split it apart at some point. I've never had any luck trying to rtv something like that, you'll never get it clean enough to stay.

oaky · Feb 13, 2019

yeah i checked the bolts.
mm maybe ill look into a case splitter then, everythings already apart anyway

Nutball · Feb 14, 2019

JB Weld Patch over the crack?

srcarr52 · Feb 14, 2019

That's the case gasket. You'll need to split the case to repair it.

Nutball · Feb 14, 2019

Either way I figure a plug over the surface would stop it.

oaky · Feb 14, 2019

well anyone know the thread sizes on the crankshaft, pto and flywheel
think flywheels 8m not sure about the pto side
its a stihl 064

oaky · Feb 14, 2019

somewhere between 10-12

srcarr52 · Feb 14, 2019

Flywheel is M10-1.0.
PTO is M12-1.0 Left hand.

And external band-aid over the leaking gasket might slow down the leak.

oaky · Feb 14, 2019

manual says the flywheel collar nut is m8x1 and i tested that nut at a hardware store it is a m8
i believe the pto is 12 though

oaky · Feb 14, 2019

might try some type sealant if the internal parts of the seal look okay but i duno. havent pulled the jug yet.

ManiacalMark · Feb 14, 2019

The main thing is if your gasket is old enough to do that then it'll only be a matter of time until it parts somewhere else.

jacob j. · Feb 14, 2019

Your best bet would be to split the case and do it right.

oaky · Feb 14, 2019

i'll split it. gotta work up some funds.

Michael Rupley · Feb 18, 2019

Here are some gasket/ seal parts for $7. Mike

oaky · Feb 18, 2019

dang i just bought that kit.
are both oil seals in there?

jacob j. · Feb 18, 2019

Michael Rupley said:
Here are some gasket/ seal parts for $7. Mike

I'll take those if the OP doesn't want them.

Michael Rupley · Feb 18, 2019

OK JJ gets first chance after OP but only one seal there. I think it is the small 064 one and hard to find. Mike

oaky · Feb 18, 2019

all yours jj

064 external crankcase seal oil leak

oaky

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ManiacalMark

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oaky

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Nutball

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srcarr52

Shop rat, backyard slice cutter.

Nutball

Here For The Long Haul!

oaky

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oaky

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srcarr52

Shop rat, backyard slice cutter.

oaky

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oaky

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ManiacalMark

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jacob j.

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oaky

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Michael Rupley

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oaky

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jacob j.

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Michael Rupley

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oaky

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