Supertech Ring Gap - Blow-By Problems
10-01-2023, 01:42 PM
#21
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Join Date: Feb 2022
Location: Colorado
Posts: 74
Total Cats: 21
Not sure how I missed all this, thanks for sharing! Thats an absolutely awesome idea and I'm sure I speak for many on the forum when I say, you should make a thread about it with some pictures! Perhaps in the definitive catch can thread.
No worries on the "thread-jack", absolutely worthwhile discussion
.
Regarding my ring gap issue...leakdown test was abysmal. Cyl 4 was at 40%, and cyl 3 was letting so much air past that it sounded like there were 10 snakes in my block hissing lol. Didn't bother with the other 2 cylinders. The cross hatching being gone in 500 miles should've been a sign. Had a mobile guy come over with a boroscope and he thinks the rings were never de-burred. Whatever the theory, its rebuild time...again. Woo!
No worries on the "thread-jack", absolutely worthwhile discussion
.Regarding my ring gap issue...leakdown test was abysmal. Cyl 4 was at 40%, and cyl 3 was letting so much air past that it sounded like there were 10 snakes in my block hissing lol. Didn't bother with the other 2 cylinders. The cross hatching being gone in 500 miles should've been a sign. Had a mobile guy come over with a boroscope and he thinks the rings were never de-burred. Whatever the theory, its rebuild time...again. Woo!
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11-09-2023, 06:51 PM
#22
I had a similar issue. However it was due to it being my spare horrible janky motor.
Probably not the smartest solution.
But I drilled a hole in my catch can and plumbed it back into the sump. I figured if it's coming from there it can go back. Been like that for years and still alive.
Probably not the smartest solution.
But I drilled a hole in my catch can and plumbed it back into the sump. I figured if it's coming from there it can go back. Been like that for years and still alive.
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11-11-2023, 04:38 PM
#23
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Join Date: Aug 2018
Location: Australia
Posts: 64
Total Cats: 11
An air pump is a great idea as an alternative to PCV vacuum recirculated back to the IM.
Did a quick google search and these pumps pull air from the intake pipe and pump it into the exhaust manifold. It’s purpose I’m a little stumped on but it’s only pumping fresh air.
Are these pumps ok with pumping oily air and actual liquid oil that escapes the baffles?
Did a quick google search and these pumps pull air from the intake pipe and pump it into the exhaust manifold. It’s purpose I’m a little stumped on but it’s only pumping fresh air.
Are these pumps ok with pumping oily air and actual liquid oil that escapes the baffles?
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11-11-2023, 06:44 PM
#24
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Join Date: Feb 2022
Location: Colorado
Posts: 74
Total Cats: 21
Just to get this thread back on track temporarily, I got the block back and gapped the rings.
I went with
.0017" top
.0022" bottom
.0022" oil rings
Edit - forgot to mention, the piston to wall was .040, so on the looser side already. (Thought too tight might've been an issue I was having). No piston slap on cold starts so we're good on that.
Out the box, that was the size of the second ring. I would have liked to be at about .0018-.0019 but seems I will just have to send it. Machine shop thinks it was part dirty assembly, part that the rings never seated initially. It makes sense considering I used VR1 as my break in oil and had issues getting it started, running rich and washing the oil away.
I went with
.0017" top
.0022" bottom
.0022" oil rings
Edit - forgot to mention, the piston to wall was .040, so on the looser side already. (Thought too tight might've been an issue I was having). No piston slap on cold starts so we're good on that.
Out the box, that was the size of the second ring. I would have liked to be at about .0018-.0019 but seems I will just have to send it. Machine shop thinks it was part dirty assembly, part that the rings never seated initially. It makes sense considering I used VR1 as my break in oil and had issues getting it started, running rich and washing the oil away.
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