Rreidnauer
New User
Hello wise lords of the old iron internet
realm. I'm in the process of putting the
engine back together in my circa 1976~78
Ford 535 backhoe, which had a plastic line
to an oil pressure gauge fail while my back
was turned, running the hoe. It pumped
itself dry, and I didn't catch it until the
knock started. Repaired the line and
refilled with oil. Then, I didn't help
matters any, because I drove it out of
where it was, to where it could be towed.
But the oil journal was already plugged
with bearing material, and more damage was
done, spinning the bearing and scoring the
crank.
Anyhow, took the crank to the shop to check
run out and cut the journals however much
would be required. They took the mains to
0.030 over, and I forget what the rod
journals were upped to. They also supplied
the replacement oversize bearings. So, as
humans are prone to error, I want to check
if the work is to spec, but I haven't been
able to find the clearance specs for when I
go to Plastigage the crank. Can I just
follow rule of thumb of 0.001 per inch
diameter of journals, or is there a
specific value on these old engines?
realm. I'm in the process of putting the
engine back together in my circa 1976~78
Ford 535 backhoe, which had a plastic line
to an oil pressure gauge fail while my back
was turned, running the hoe. It pumped
itself dry, and I didn't catch it until the
knock started. Repaired the line and
refilled with oil. Then, I didn't help
matters any, because I drove it out of
where it was, to where it could be towed.
But the oil journal was already plugged
with bearing material, and more damage was
done, spinning the bearing and scoring the
crank.
Anyhow, took the crank to the shop to check
run out and cut the journals however much
would be required. They took the mains to
0.030 over, and I forget what the rod
journals were upped to. They also supplied
the replacement oversize bearings. So, as
humans are prone to error, I want to check
if the work is to spec, but I haven't been
able to find the clearance specs for when I
go to Plastigage the crank. Can I just
follow rule of thumb of 0.001 per inch
diameter of journals, or is there a
specific value on these old engines?
