Crank seal

Ok, I'm put my new crank seal in, fuck if I didn't set improper, it's got a pucker in it. Ordered a new ,now I don't remember on another build if dabbled a bit of oil on it before I set it. Should I oil it or press it in as ?

Re: Crank seal

I always dunk seals in oil before installing .

Re: Crank seal

Thanks PD! Won't make that mistake again... ;/

Re: Crank seal

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Okay. So I’m trying to dig out the misplaced new seal and it’s not budging. Using dental picks. Drop of oil. Heat. I’ve only managed to gouge up the rubber. I’m thinking I’ll end up splitting the case. I’ll give it one more try. ;(

Re: Crank seal

Get those coils out of the way .

Then use a flat blade screwdriver to pry it out .

You have to get behind the metal body of the seal .

Re: Crank seal

I wasn’t sure of that I didn’t want to gouge the inside case. But here goes!

Re: Crank seal

Dirty30 Dillon /

Right angle seal picks x2, get them in and under the ID of the seal.

Don't pry with anything against the alu case.

Re: Crank seal

It. Came right out. But I’m pretty sure I just put the new one in backward. The spring is visible

B21DC1F3-77B0-4A22-93C7-19ACC1844B30.jpeg

Re: Crank seal

works the same. always buy extra as well, save on shipping and time.

Re: Crank seal

Roger. Also I put it in my notebook. Thanks guys!

Re: Crank seal

> Dirty30 Dillon Wrote:

> -------------------------------------------------------

> Right angle seal picks x2, get them in and under the ID of the seal.

>

> Don't pry with anything against the alu case.

Id be more worried about gouging the seal surface of the crank. A gouge in the aluminum can be filled with liquid sealer before installing the seal itself.

Re: Crank seal

Dirty30 Dillon /

> live ɘvil Wrote:

> -------------------------------------------------------

> > Dirty30 Dillon Wrote:

>

> > -------------------------------------------------------

>

> > Right angle seal picks x2, get them in and under the ID of the seal.

>

> >

>

> > Don't pry with anything against the alu case.

>

> Id be more worried about gouging the seal surface of the crank. A gouge

> in the aluminum can be filled with liquid sealer before installing the

> seal itself.

It's exponentially easier to gouge aluminum with a hardened screwdriver, vs. scratching hardened steel with a cheap chromed pick.

Re: Crank seal

I've never put a seal in backwards like that. You sure it won't leak oil?

Re: Crank seal

I pulled it out Don. But I ripped it, bummer. So I ordered yet another. And I hate paying shipping so I got supplies for the Grande rebuild to stockpile. Also no scratches! Guess I got that going for me! Can't wait to get back outside to work.

Re: Crank seal

I'd say that's a good move.

Re: Crank seal

thinking out loud, but to pop out a seal without damage might be to cycle the piston to cover the exhaust port and just blast compressed air into intake, done.

Re: Crank seal

Too many other places could pop out. Like gaskets and the other seal in the gearbox side.

Re: Crank seal

Dirty30 Dillon /

> Don Ohio Wrote:

> -------------------------------------------------------

> Too many other places could pop out. Like gaskets and the other seal in

> the gearbox side.

Ugh, this is wrong.

You're obviously not dislodging a gasket with air. Gaskets are compressed between two surfaces, so they should not have traction to move.

Also, there are no other seals.

This trick works, I can confirm that.

Re: Crank seal

Well, I would never do it. Take the risk if you want.

Re: Crank seal

See that spring? It compresses the center of the seal against the crank. The outside metal ring is rigid to create friction against the case to keep it sealed and in place. Whether it is spring in or spring out, it doesn't affect the way the seal resists lateral movement and seal against the crank.

That said, one thing that can improve the seal is to use a double lipped seal. Most of the treats seals are single lip.

AVX seals in California sells this inexpensive seal. It's double lipped and high quality. I've had really good luck with them.

Re: Crank seal

All is well. I don't even know why I thought I could easily pop that seal with everything in the way. Compressor would've been the trick. But with coils out of way it easily came out. I'll try the AVX site , Ike. It wouldn't open for me. I wish it would warm up, I don't like working in the basement. ;(

Re: Crank seal

Sure , seals might work springs in or out , But , I've never seen a factory set seal , in anything , with the springs outward .

Maybe they know something ?

Re: Crank seal

> P D Wrote:

> -------------------------------------------------------

> Sure , seals might work springs in or out , But , I've never seen a

> factory set seal , in anything , with the springs outward .

>

> Maybe they know something ?

Russstttttttttt.

Re: Crank seal

> live ɘvil Wrote:

> -------------------------------------------------------

> > P D Wrote:

>

> > -------------------------------------------------------

>

> > Sure , seals might work springs in or out , But , I've never seen a

>

> > factory set seal , in anything , with the springs outward .

>

> >

>

> > Maybe they know something ?

>

> Russstttttttttt.

Among other things . ;)

Re: Crank seal

Yes, I read up on it some on a Yamaha 2-stroke site. The spring on flywheel side should be installed spring toward crankcase for lube of seal and the spring. They seemed to say it was okay to face it either way on the right side crank seal.

I'm gonna always mount the seal the old way. That's the way they are oriented in my Morinis and Tomos.

Re: Crank seal

Oiled up new seal, pressed in. Going to set gap and finish rebuild.

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