Piston rings bad?
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Old March 5th, 2012, 03:51 AM   #1
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Piston rings bad?


I rebuilt the engine with forged internals 0.20" overpistons and speed pro rings anyway I started the engine up and it ran good started right up but after letting it idle Like 10 minutes i noticed antifreeze coming out of the tail pipe did a compression test and all of the driver's side were so i took the heads off to replace the head gaskets and while taking the heads off i sprayed wd-40 into the cylinders to prevent rust well i noticed that only in one cylinder the wd-40 oil leaked passed the rings after like an hr and a half or so but all the rest would be the same, is it normal that the ring hasn't seated yet or should i take it apart since it's already apart? Also if i have to take it apart could i just redo the one piston with a hone or would all have to be done?
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Old March 5th, 2012, 04:24 AM   #2
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how many miles since the rebuild? So only one piston is leaking WD40 past the rings?
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Old March 5th, 2012, 04:48 AM   #3
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0 miles idled 10 minutes and took apart for a bad head gasket install yeah only one cylinder wd-40 leaks passed
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Old March 5th, 2012, 06:04 AM   #4
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i would just replace the HG, i wouldnt worry about the ring. Its main job is to scrape oil off the cylinder walls. Since WD-40 is a liquid it is bound to seep past a ring or two.
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Old March 5th, 2012, 08:49 AM   #5
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Originally Posted by CobraStang161 View Post
i would just replace the HG, i wouldnt worry about the ring. Its main job is to scrape oil off the cylinder walls. Since WD-40 is a liquid it is bound to seep past a ring or two.
Rings aren't great at stopping solvent. Solvents like WD-40 are meant to be VERY thin and penetrate just about any crevice.

However due to your question, did you stagger the gaps on all the rings by any chance?
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Old March 5th, 2012, 10:15 AM   #6
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Originally Posted by WickedSnake00 View Post
Rings aren't great at stopping solvent. Solvents like WD-40 are meant to be VERY thin and penetrate just about any crevice.

However due to your question, did you stagger the gaps on all the rings by any chance?
Yeah the rings are staggered, I hope you guys are right only thing i question is because of this video on youtube

And i was like if gas is test and it has less viscosity then wd-40 has to be worse but if what that youtube video is saying is a bunch of horse shit then i'm happy lol
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Old March 5th, 2012, 11:03 AM   #7
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as long as you staggered them and they are filed to your application, shouldnt be any issues bruh!
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Old March 5th, 2012, 11:09 AM   #8
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since the cylinder is angled, maybe you have the top ring gap on that piston at the bottom and fluid drained past, whereas the others gap may be at the top toward the intake so its sealed all the way where the fluid is sitting.
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Old March 5th, 2012, 11:55 AM   #9
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Originally Posted by BakerFX4 View Post
since the cylinder is angled, maybe you have the top ring gap on that piston at the bottom and fluid drained past, whereas the others gap may be at the top toward the intake so its sealed all the way where the fluid is sitting.
Ok thanks, i'll just put it back together then
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