Sealer on primary gear?

[lt1bird]

Anyone run sealer on the primary gear? I hear that a super thin coat on the inside of the primary gear shaft....this will help seal up any possable leaks from the crankcase...sucking tranny fluid in...

[Dave I.]

Yes, I even use more than a thin coat...its good to get it around the keyway also.

[BigRed350x]

I had to do the same on a 10mil cheetah I built a while back. It would suck air around the key. I used the red hi-temp gas/oil resistant silicone that you can buy down at any of the auto parts places. Worked perfect.

[shanYE west]

Never used it on any of my builds.. but I do put new seals in every time the motor comes apart.

[lt1bird]

So some folks do and some do not....Hmmmmmmmm

[MDS2106]

I have never used it.I have heard of using it but never had the need.

 

 

Mark

[lt1bird]

Think ill run a bead in between the primary gear and the water pump gear....it will get trapped in there from the gear anyway...this way it will seal but still come off easy

[BigRed350x]

I think it might have to do with what crank you run as well. Some of the cranks have the keyway milled back farther towards the web of the crank, but some don't. I had a billet 10mil crank from twister that didn't need it and I had a 10mil crank from cascade that had the key-way milled back quite a bit father than the other crank and it had a nasty air leak past the key when I leak-down tested it. Some of the cranks are milled back through where the crank seal actually seals and some don't. I've never had a 4mil crank that needed it.

[Dave I.]

yea my stock crank and stock gears didnt need it. My billet crank and straight cuts leaked like crazy......just depends what combo you run.....doesnt hurt anything to put some sealer on anyway.