Ford 460 Oil Leak Mystery

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Drayke

Always Baja Bound
Jan 29, 2007
868
49
28
Torrance
#34
headgasket was in good shape - no evidence of a leak path anywhere.
I was using a flashlight to brighten up each cylinder for the pictures, maybe that's what you're seeing? all the pistons have that carbon on them, roughly equally.
 

Drayke

Always Baja Bound
Jan 29, 2007
868
49
28
Torrance
#35
The motor is off at the builder now and their inspection showed the cylinders being out of round. .002 at the top and .001 at the bottom.

Going to rebore (which will put me at .040 over stock, was .030 over) & new pistons.

Any comments to why that happened? the shop didn't give me a root cause.
 

84projectford

Senior Member
Sep 8, 2010
649
120
43
Phoenix Az
#38
Where was the loosest side at? On the piston skirt side or wrist pin side? Coulda had a sleeve shoved in it after it was bored (big no no). Can cause a distortion of the rest of the cyl on that side like that. Wouldn’t cause both banks to do that though.

If the wear is on the skirt side, probably just wear and tear or like barge says, shit machine work
 

Drayke

Always Baja Bound
Jan 29, 2007
868
49
28
Torrance
#39
Not sure - i didn't do the measurements myself, The info I gave you guys is just what the new shop told me over the phone.

I think i believe the theory of poor machine work considering the shop I went to didn't give me a ton of warm fuzzies
 

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