Update on smoke issues with new 383...
Thread Starter
Melting Slicks
Joined: Feb 2003
Posts: 2,529
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From: Auburndale Florida
2025 C2 of the Year ('64-'66) Finalist - Unmodified
St. Jude Donor '03-'05-'06-'07-'09
Update THURSDAY 5/17 re smoke issues with new 383...
Well after 2 new sets of heads, 2 new intakes, removing and angle milling the last intake....along with this week I added new valve covers with baffles, a pcv valve...drove for 10 miles tonight...still smoking.
In fact its worse than ever. I had drained the Vavolene 10-30 which had 1 PINT of LUCAS OIL TREATMENT that I added. To see if it slowed down the smoking (and it did) refilled with some sheap STP 10-30 wt.
Car runs good, temp is normal, oil pressure is good...but at idle it looks like a fogging machine, mostly on the drivers side......
I think I have exhasted every possible cause of oil entering the engine, other than past the rings. I may drive it some Friday and see if it improves. I changed the oil to get the super slippery Lucas oil out to see if I could get the rings to seat (if that is the probelm)....and it seems clear there is is a problem in the bottom end. Time to yank it out and take back to the builder.
Would cheap oil cause an engine to smoke, I wouldn't think so...
Thanks to everyone for their help, ideas and support!!
Mark
THURSDAY 5/17 UPDATE AT END OF THREAD
In fact its worse than ever. I had drained the Vavolene 10-30 which had 1 PINT of LUCAS OIL TREATMENT that I added. To see if it slowed down the smoking (and it did) refilled with some sheap STP 10-30 wt.
Car runs good, temp is normal, oil pressure is good...but at idle it looks like a fogging machine, mostly on the drivers side......
I think I have exhasted every possible cause of oil entering the engine, other than past the rings. I may drive it some Friday and see if it improves. I changed the oil to get the super slippery Lucas oil out to see if I could get the rings to seat (if that is the probelm)....and it seems clear there is is a problem in the bottom end. Time to yank it out and take back to the builder.
Would cheap oil cause an engine to smoke, I wouldn't think so...
Thanks to everyone for their help, ideas and support!!
MarkTHURSDAY 5/17 UPDATE AT END OF THREAD
Last edited by mbeeman350; May 17, 2007 at 08:39 PM.
Melting Slicks
Joined: Jul 2005
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From: winter haven florida
St. Jude Donor '12
drive it for a while, like 50 to 75 miles and dont go too easy on it. if it works then you are in the clear if not then pull it out, but i would drive the crap out of it to make sure all the oil is out. i was told with my last rebuild to run it a few minutes get it warm and then change oil, then let it go for about 300 to 500 miles before the next change. the motor is still running strong and that was 150,000 miles ago. currently getting ready to rebuild it again just for fun.
Le Mans Master
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From: Unreconstructed, South Carolina
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I run a bead of silicone along the bottom of the entire length of the intake gasket on bothe sides so no oil will get into the heads from the lifter valley if the angles of the intake and heads are not bang on. YOu might want to try that, milling the intake indicates you thought the angles were incorrect and maybe they still are 
Le Mans Master
Joined: Oct 2006
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
WHo built the short block? I'd have to suggest they either stacked the oil rings, or put all the gaps together. Even with good compression, if the oil rings aren't right it'll pump oil like no tomorrow..
Senior Member since 1492
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Did you check valve lash? My #1 intake nut backed off about 1 year after start up....took me a while to find. 
#1 intake valve wasn't opening at all. 
http://temp.corvetteforum.net/c3/the...t/index2.shtml
#1 intake valve wasn't opening at all. http://temp.corvetteforum.net/c3/the...t/index2.shtml
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Thread Starter
Melting Slicks
Joined: Feb 2003
Posts: 2,529
Likes: 27
From: Auburndale Florida
2025 C2 of the Year ('64-'66) Finalist - Unmodified
St. Jude Donor '03-'05-'06-'07-'09
I know....I know...can't say I haven't tried everything and all the suggestions''' while I waited on my hoist to come home...which will be here Saturday. Thanks for all your help
I had .010 removed to clean it up and to put a litle more clamping force on the bottom edge of the intake. I used a Mr Gasket Ultra Seal. Which has printoseal on both sides. Then I applied ULTRA GRAY slicone to both sides of the gasket...for added insurance for a good deal.
Already talked to him...in fact early on. He stands behind his work! He will make it right, if it something he did wrong..
Engine has good vacuum, idle and runs too good to be runing on 7 cylinders...
Again thanks to everyone for their help and patience, Not trying to beat a dead horse. Had some time waiting for my hoist to come back, so like I said I exhausted every possible cause...Mark
I run a bead of silicone along the bottom of the entire length of the intake gasket on bothe sides so no oil will get into the heads from the lifter valley if the angles of the intake and heads are not bang on. YOu might want to try that, milling the intake indicates you thought the angles were incorrect and maybe they still are
Did you check valve lash? My #1 intake nut backed off about 1 year after start up....took me a while to find. #1 intake valve wasn't opening at all.
http://temp.corvetteforum.net/c3/the...t/index2.shtml
#1 intake valve wasn't opening at all. http://temp.corvetteforum.net/c3/the...t/index2.shtml
Again thanks to everyone for their help and patience, Not trying to beat a dead horse. Had some time waiting for my hoist to come back, so like I said I exhausted every possible cause...Mark
Thread Starter
Melting Slicks
Joined: Feb 2003
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From: Auburndale Florida
2025 C2 of the Year ('64-'66) Finalist - Unmodified
St. Jude Donor '03-'05-'06-'07-'09
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From: Millington Illinois
St. Jude Donor '08-'09
Le Mans Master
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He better post pics, or I won't talk to him anymore.
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Le Mans Master
Joined: Oct 2006
Posts: 7,123
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
