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Intermittent Oil Smoke
Date: January 15, 2018 10:09AM

Intermittently, the right bank of my 1965 140 engine emits clouds of smoke. I have determined that it is from cylinder 5 (the photo caption refers to photo 1, not cylinder 1.) Compression of cylinder 5 when not smoking is about 140, which is the same as the other cylinders. I used my borescope to peer into the cylinder and found a lot of oil, but I have no idea how it is getting there. Between episodes of smoking, the engine runs well and does not smoke. Any thoughts?

Attachments:
Re: Intermittent Oil Smoke
Posted by: MattNall ()
Date: January 15, 2018 10:30AM

Sadly just a design anomaly... park and shut off with just the right conditions and it smokes...

Visible oil is not good.. but if it doesn't foul the plug.... drive it..





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Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
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Re: Intermittent Oil Smoke
Posted by: Wagon Master ()
Date: January 15, 2018 10:35AM

I can't orientate myself to understand what part of the cylinder I'm looking at.

'64 Monza Coupe 140 4 speed
'61 700 Lakewood 95 4 speed
'69 Monza Convert. 140 Auto.

Been aircooled since 1973
Northwest Ohio

Re: Intermittent Oil Smoke
Posted by: MattNall ()
Date: January 15, 2018 10:43AM

down thru plug hole

Piston cro0wn to left... Barrel with hone marks on bottom with small puddle of oil.





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Re: Intermittent Oil Smoke
Posted by: Bob Helt ()
Date: January 15, 2018 02:03PM

I'd guess that there are two possibilities.
1) one or more broken rings.Could have been caused during rebuilding engine or even from detonation

2) possibly cylinder warp Some 60 over bores weaken the cyl enough to warp. Must replace to fix.

Looks like you will have to pull the head on that side and find out'

Bob Helt

Re: Intermittent Oil Smoke
Posted by: Layton Curtis ()
Date: January 16, 2018 05:32AM

If you park the car on an incline-and you have the oil on the full mark on the dipstick-and if the rings are in line on that cylinder you could possibly have leakage into the cylinder. Run at about a pint low and see what happens.

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