ridge at the top of the cylinder bad?
Every gen3 engine I've ever had the heads off of still had the hone marks in the cylinders. If that is an actual ridge and not just carbon, then it's the first time I've seen it. Is that an LQ4 6.0? What are your plans for this engine? There is a tool called a ridge reamer that will allow you to cut the ridge out of the top, but it wouldn't be my first choice to resolve the issue.
Every gen3 engine I've ever had the heads off of still had the hone marks in the cylinders. If that is an actual ridge and not just carbon, then it's the first time I've seen it. Is that an LQ4 6.0? What are your plans for this engine? There is a tool called a ridge reamer that will allow you to cut the ridge out of the top, but it wouldn't be my first choice to resolve the issue.
So what's the difference between hone marks and a ridge?
Cost of boring it out vs ridge reamer?
What I'm saying is if you can see the hone marks then the cylinder can't have a ridge because there is no wear. If you bore it it's gonna cost you whatever the machine shop charges plus the cost of oversized pistons. But if you can still see the hone marks you don't have to worry about doing either one.
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Staging Lane
Joined: Oct 2007
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If you cant afford to bore it, then just leave the cylinders alone provided they do decent on a compression test. If one or more of the cylinders don't do well on a compression test(all within 20% of eachother) then you will be wasting your time putting it into your car and should wait until you can afford to properly rebuild the engine before installing it.
The ridge line is not going to affect anything because the rings do not go that high in the cylinder. I would leave it alone. If you can't afford to bore it, then install it as is.
Every higher milage motor I have ever seen has had the ridge, its because the rings wear down the cylinder, its normal.
A lot of the built motors never get a ridge because they get torn down before the ridge can develope.
A lot of the built motors never get a ridge because they get torn down before the ridge can develope.
if you are doing rings, give it a good hone. needs one anyway to help ring seal.
that will get rid of the ridge.
no need to bore unless the cylinder is out of round or you got a crack,etc.....
that will get rid of the ridge.
no need to bore unless the cylinder is out of round or you got a crack,etc.....
