Oil Smoke driving me crazy
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Re: Oil Smoke driving me crazy
The main bearing looks like the clearance was too tight.
Something still does not look right to me on the oil ring. Can you take a picture aimed straight at the side of the piston instead of at an angle ? Mainly of the oil ring.
Something still does not look right to me on the oil ring. Can you take a picture aimed straight at the side of the piston instead of at an angle ? Mainly of the oil ring.
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
www.enginerepairshop.com
Advanced Automotive Machine
Waldorf Md
www.enginerepairshop.com
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Re: Oil Smoke driving me crazy
Oil will make it detonate faster.
Re: Oil Smoke driving me crazy
I’m trying to figure out what came first,oil or detonation
Re: Oil Smoke driving me crazy
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Re: Oil Smoke driving me crazy
Ok, Oil ring looks fine Must have been the angle in the other pic.
The main bearing looks like it is contacting almost 100% of the bearing diameter. Usually there is an area near the parting lines where the bearing is thinner and there is no contact. I think Clevite says it should be about 80% contact ? That's why it looks like there was not enough clearance. Still does not explain the oil issue.
The main bearing looks like it is contacting almost 100% of the bearing diameter. Usually there is an area near the parting lines where the bearing is thinner and there is no contact. I think Clevite says it should be about 80% contact ? That's why it looks like there was not enough clearance. Still does not explain the oil issue.
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
www.enginerepairshop.com
Advanced Automotive Machine
Waldorf Md
www.enginerepairshop.com
Re: Oil Smoke driving me crazy
Bores have anywhere from .0005-.0010” egg shape. Some of the skirts on pistons collapsed too.
Re: Oil Smoke driving me crazy
Not enough clearance, it scuffed the skirts and pinched the oil ring.
Re: Oil Smoke driving me crazy
How do all the other bearings look?
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: Oil Smoke driving me crazy
Maybe you had fuel wash on initial start up..they do look scuffed which will pinch oil ring first.
Fuel in the oil too by the looks of the bearings.
How did it start up, quick with minimal cranking and fuel?
Re: Oil Smoke driving me crazy
Fired right up. I didn’t do my normal break in though. Since it has a roller cam I didn’t run it 20 minutes at 2500 RPM. Then I had to break the gears it before I really put it through the paces. Baddies it in the beginning.
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Re: Oil Smoke driving me crazy
Oh well then, You seem have the answer for everything and every suggestion to why it shouldn’t have ate itself up.Raybo wrote: ↑Sun Jun 21, 2020 11:08 pmFired right up. I didn’t do my normal break in though. Since it has a roller cam I didn’t run it 20 minutes at 2500 RPM. Then I had to break the gears it before I really put it through the paces. Baddies it in the beginning.
Break in what gears and what’s a baddie?