289 Rebuild questions.

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Errol Smith - 26 Nov 2003 06:26 GMT

OK, so im ready to pull the cylinders out of the block, what do i use
to take the ridge off? And ive got one of those reamers with the
little balls on it to do cleanup (got it from a friend). I put it in
the drill and then do i start from the top of the cylinder or the
bottom? or does it matter? Please no flames. Thank you.

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Jim Warman - 26 Nov 2003 07:12 GMT

Two ways to take this, Errol...... if the motor has never been rebuilt
before, there's a good chance that you might just as well knock the pistons
out without worrying about the ridge...... you'll be looking at a rebore and
new pistons. If there is a real noticeable ridge, this is likely the case.

OTOH, if you feel there is a chance that you can save some of this stuff,
you will need a ridge reamer.....
http://www.mytoolstore.com/kd/kdengi07.html is a decent tool (I have one)
but you need to take a lot of care using it. It is possible to destroy the
top end of the cylinder through carelessness. The tool you have is NOT a
reamer... it is a deglazer and only works well in cylinders that have no
appreciable out of round or taper.

This is not a flame, by any means, but I think you need to read up a little
on cylinder preparation before you set yourself up for a moderately
expensive disappointment. I was young once, made many mistakes and I'd like
to help others avoid those same mistakes....

HTH
Jim Warman
mechanic@telusplanet.net

> OK, so im ready to pull the cylinders out of the block, what do i use
> to take the ridge off? And ive got one of those reamers with the
> little balls on it to do cleanup (got it from a friend). I put it in
> the drill and then do i start from the top of the cylinder or the
> bottom? or does it matter? Please no flames. Thank you.

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Larry Hepinstall - 26 Nov 2003 15:47 GMT

> This is not a flame, by any means, but I think you need to read up a
> little on cylinder preparation before you set yourself up for a moderately
> expensive disappointment. I was young once, made many mistakes and > I'd

like to help others avoid those same mistakes....

This is excellent advice and applies to all aspects of engine building. At
the minimum, get some books on engine building, read them, and understand
them. The time and money you invest doing that will be repaid many many
times.

A better way to learn is to take an engine building class at your local
community college. The class is inexpensive and FUN. You will actually
tear down and reassemble an engine and make it run. You'll learn how to use
all the tools (including a ridge reamer) and practice with them on SOMEONE
ELSES ENGINE. That way when you build YOUR engine you'll have an excellent
chance of building an excellent performing, long lived engine.

LJH
95GT (took the class, bought the books, built a great running 331 stroker)

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Beebsterboy1 - 29 Nov 2003 18:02 GMT

if you pull the pistons out and you got a small ridge on the top can you feel
it with your fingernails. if you can't feel it with your fingernails just hone
it top down. go upand down slowly with the hone. If you feel a real strong
ridge on it you will need to use a ridge reemer to get the ridge off the top.

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