72golddustermike
Well-Known Member
May have a bad crankshaft.
Rear Main leak above 3000 rpm only?
- Thread starter 72golddustermike
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Hemirunner
Well-Known Member
Holy hell.... that’s really rough looking.
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That's really bad. No wonder you can't get a seal to work. It needs to be pit free at the least but I don't know if turning it will get that done.
68Moparmaniac
Well-Known Member
lewtot184
Well-Known Member
never seen one that bad. looks like it's been sitting in a mudhole for 20yrs.
Garys1969RR
Well-Known Member
I think turning the crank would make it too small right there, then it still wouldn't seal.
HT413
Semi Pro Bowler
Looking at that crank, the seal’s doing you a favor by keeping you under 3000 rpm.
72golddustermike
Well-Known Member
Engine is fresh rebuild. I asked about the seal area and the guy helping build it said it would seal cause the 2 piece seal rides toward inside. Anyway guess he was wrong lol.
HT413
Semi Pro Bowler
That crank looks terrible. Even if I ignore the massive pitting, the fact it still has surface rust on it is appalling. Don’t see how it’ll ever seal.
I’d go back to that guy and raise hell.
Hate that that guy used the damn thing in your build. I can’t find a pic of the crank I used or the one I pulled out of my old motor, but here are a couple pics of what they should look like. Notice the lack of surface rust and pitting.
Garys1969RR
Well-Known Member
Here's the rear seal on my 512. I always put some silicone along the vertical parting surfaces, at the back of the block, as well as at the pan rail. And put the side seals in too, for added insurance. Never had one leak yet. The crank has to be smooth, of course.
Bee1971
Well-Known Member
When you have the opportunity to play and mock things up while assembly , you can really see it doesn’t take much movement to have the seal ends off or not in alignment , especially when tightening down the retainer
Like others have stated - It’s to bad that crankshaft was put back into that motor looking like that
Should have never been assembled with that crankshaft
Like others have stated - It’s to bad that crankshaft was put back into that motor looking like that
Should have never been assembled with that crankshaft
Bee1971
Well-Known Member
I ended up offsetting the seals or clocking
Marking the billet retainer and the block for perfect alignment , didn’t end up using the factory retainer
And of course the new stroker crankshaft
Marking the billet retainer and the block for perfect alignment , didn’t end up using the factory retainer
And of course the new stroker crankshaft
lewtot184
Well-Known Member
hard to believe someone would say that crank was o.k. from my experience I wouldn't let most of the "pro's" work on my lawnmower.
HT413
Semi Pro Bowler
That RMS did you a favor. If he did that, imagine what else he did wrong that’s now buried in the motor.
I’d bet a fresh rebuild will expose many time bombs that are just waiting to eat that thing.
I wouldn’t be surprised if the journals were a mess and the bearing clearances weren’t even checked.
I’d bet a fresh rebuild will expose many time bombs that are just waiting to eat that thing.
I wouldn’t be surprised if the journals were a mess and the bearing clearances weren’t even checked.
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