MileHighDart
Well-Known Member
Been wanting to do some tuning in my 318 to try and get it running better.
Going to do a dist recurve, get a wideband 02 gauge/sensor so I can get the carb dialed in better, etc.
But I thought I'd start with the basics and start with a compression test.
Keep in mind this 318 was built about 17 years ago, but has probably less than 3000 miles on it. Most of those years it has set waiting for a car to go into.
I have had some issues with it smoking after its warmed up. Changed the valve seals and that helped a little, but it still smokes a little after it warms up, but not too bad.
I'm starting to think that the rings are collapsed or stuck and I'm getting some oil past the rings, and this may also be why I got the numbers I did on my compression test.
Look at the attached pic for the results.
#1 was the lowest at 101, highest on a couple other cylinders was 128.
I've heard that you should have only a 10 percent variance between cylinders.
How should I proceed trying to fix this? Is there a solvent or something I can use to try to un-stick the rings, or do I need to tear it down, get new rings, give the cylinders a quick hone and reassemble ?
Or should I just run with it like it is for the summer, and fix it next winter?
Going to do a dist recurve, get a wideband 02 gauge/sensor so I can get the carb dialed in better, etc.
But I thought I'd start with the basics and start with a compression test.
Keep in mind this 318 was built about 17 years ago, but has probably less than 3000 miles on it. Most of those years it has set waiting for a car to go into.
I have had some issues with it smoking after its warmed up. Changed the valve seals and that helped a little, but it still smokes a little after it warms up, but not too bad.
I'm starting to think that the rings are collapsed or stuck and I'm getting some oil past the rings, and this may also be why I got the numbers I did on my compression test.
Look at the attached pic for the results.
#1 was the lowest at 101, highest on a couple other cylinders was 128.
I've heard that you should have only a 10 percent variance between cylinders.
How should I proceed trying to fix this? Is there a solvent or something I can use to try to un-stick the rings, or do I need to tear it down, get new rings, give the cylinders a quick hone and reassemble ?
Or should I just run with it like it is for the summer, and fix it next winter?