Re: When to machine a crank

Posted by redforlife on March 17, 2023 at 01:28:05 from (174.213.211.93):

In Reply to: When to machine a crank posted by Bkpigs on March 16, 2023 at 16:44:43:

If you are just putting on a new head
gasket for what ever reason (like
leaking?), and not doing anything down
below, I wouldn't worry about it. I
wouldn't tear the bottom end apart if all I
was doing was a head gasket. No need in
going down there, unless you suspect a
problem.

Now if you were putting on a rebuilt head,
and or new rings, or doing somewhat of a
partial overhaul, it'd be a good idea to
check things out. Or if you had the bottom
end apart and was there anyways, it'd be a
good time and idea for new bearings.

As others have stated, better know what
your doing when replacing rod and main
bearings. Alot more skill level required in
changing bearings, than say, changing the
oil or a head gasket. It takes more know
how. Not really so much in doing it by the
book right, but knowing what'll work, and
what won't. Knowing what your looking at.
New bearings isn't going to do any good if
it has a scored up crank. An experienced
mechanic that has seen some bad ones, and
some good ones, can tell alot by just
looking. And tell more by measuring. And
the measuring thing is an art of its own.
Alot of preciseness to doing that. No room
for sloppiness when it comes to the
measuring. Or really for doing overhauls in
general. Sloppy work will lead to big
problems.

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