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Cylinder FRP Gouge - Salvageable?

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Old 08-21-2018, 05:04 AM
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Originally Posted by sk2_bri
Yep. The retainers turned out to be fine and I shouldn't have messed with them. But since I have been close to a mild money shift a couple of time in 6 weeks, I figured there was a good chance the previous owners had done it at least once in 15 years. Should have just inspected them.

Potentially expensive lesson. But at least I know how to do a top end on this car now.
I could tell some stories.
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Old 08-21-2018, 07:13 AM
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hopefully the rings still seal

once its back together go drive it then do a compression test
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Old 08-23-2018, 03:21 PM
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So far so good!
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Old 08-26-2018, 03:28 AM
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Compression test results?
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Old 08-26-2018, 01:18 PM
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If its me, I'm feeling relieved with those numbers. I think you are going to be fine. I'm no expert though. Wait for others to chime in.
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Old 08-26-2018, 01:34 PM
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its fine, hopefully lasts
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Old 08-27-2018, 04:19 AM
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Originally Posted by sk2_bri
Well, I wasn't able to salvage the compression tester I used a few weeks ago prior to the cylinder damage and had to buy a new one today. Just performed the test and here are the results:

Test prior to damage: 200, 190, 205, 205
Current test: 195, 190, 210, 210

Cylinder #3 was the one with the damage so I feel good that it didn't go down. I assume there is some variation due to the change in equipment but overall I'm satisfied since there wasn't a step change.

Should I be concerned over the relative differences in the pressures where they are and have been?
Numbers are fine. The variation is what to look for. Did you happen to also do a wet test? That's what I'd also be interested in for the gouged cylinder.... at least for curiosity's sake.
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Old 08-27-2018, 08:06 AM
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Originally Posted by VashTheStampede
Numbers are fine. The variation is what to look for. Did you happen to also do a wet test? That's what I'd also be interested in for the gouged cylinder.... at least for curiosity's sake.
Gouged cylinder was #3, you'd never see it affect compression that low in the cylinder for obvious reasons, the main one being compression happens at TDC not middle dead center.
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Old 08-28-2018, 09:25 AM
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Originally Posted by sk2_bri
I didn't do a wet test (or a leakdown test for that matter). I have a bit of "diagnostic fatigue" right now and think I will just drive and enjoy a working car for a while.
Yup - just enjoy it. Its gonna be fine.
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Old 08-30-2018, 04:24 AM
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Originally Posted by Slowcrash_101
Gouged cylinder was #3, you'd never see it affect compression that low in the cylinder for obvious reasons, the main one being compression happens at TDC not middle dead center.
In my experience, I don't trust anything with these as "obvious" when I see something unusual. I clearly stated that it was for "curiosity's sake". I can't think of a time where I'll ever see this type of cylinder wall damage again, nor do I ever think we'll have a chance to ask this owner to do a simple test before there are many miles on the fix (so-to-speak). Do I really think that it'll affect compression? Probably not. Do I want to see a wet test now in order to compare it with a future wet test that I think OP might need? You betcha!

It's all about eliminating variables in a diagnosis.... even if that diagnosis isn't needed yet, and that variable is totally off the wall.
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