C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Lightly smoking engine

Thread Tools
 
Search this Thread
 
Old Mar 2, 2009 | 03:15 PM
  #1  
72Shark's Avatar
72Shark
Thread Starter
Pro
10 Year Member
 
Joined: Oct 2000
Posts: 509
Likes: 0
Default Lightly smoking engine

My 72 has been sitting for about 1.5 years, waiting for interior and paint. I installed new TFS heads, new cam, exhaust, etc about 5 years ago, but have only put about 1000 miles on the car since. I recently added an RPM intake and a "new" double pumper. But, WTH???......started her up and backed her out last month, and she's smoking out both tailpipes!!! Just a constant light blue/white smoke trail that remains after an oil change, and running around the block on 4occasions. Smells like a smoking car too. The shortblock is "less than 10k miles fresh".

Does this mean I need to install new piston rings??? (I don't think it could be valve seals??) Hmmmmm???????
Reply
Old Mar 2, 2009 | 04:27 PM
  #2  
justanotherdoe's Avatar
justanotherdoe
Racer
 
Joined: Mar 2006
Posts: 366
Likes: 1
From: Houston Texas
Default

I had some smoke on cool mornings after swapping carbs. Had the bluish oil color. Turned out to be the choke. Once I got it set right, all smoke went away.
Reply
Old Mar 3, 2009 | 03:46 PM
  #3  
72Shark's Avatar
72Shark
Thread Starter
Pro
10 Year Member
 
Joined: Oct 2000
Posts: 509
Likes: 0
Default

I wish it was the choke!! My carb is chokeless....so that takes that outta the equation. It doesn't smoke the first few seconds, but after about 10 seconds....here it comes. Arrggghhhhhh!!!

Piston rings?
Valve seals? (I don't see how!)
Leaking intake manifold?? (but it comes outta both pipes..)

Hmmm. Totally bummed and confused.
Reply
Old Mar 3, 2009 | 04:23 PM
  #4  
smon's Avatar
smon
Racer
10 Year Member
 
Joined: Nov 2006
Posts: 495
Likes: 1
From: Lubbock TX
Default

Did you everything in before you parked it? And were there any problems before or is all this new?

Sean
Reply
Old Mar 5, 2009 | 12:20 AM
  #5  
J-Vett's Avatar
J-Vett
6th Gear
 
Joined: Mar 2008
Posts: 6
Likes: 0
From: lake jackson texas
Default

My car did the same with a double pumper. Ended up getting a smaller single pump carb and runs fine. You might try cutting back on the regulator and see if the smoke stops. If so you are getting too much gas.
Reply
Old Mar 5, 2009 | 12:39 AM
  #6  
OzzyTom's Avatar
OzzyTom
Burning Brakes
20 Year Member
Liked
 
Joined: Dec 2003
Posts: 1,004
Likes: 7
From: Adelaide South Australia
Default

Originally Posted by J-Vett
My car did the same with a double pumper. Ended up getting a smaller single pump carb and runs fine. You might try cutting back on the regulator and see if the smoke stops. If so you are getting too much gas.

running rich (fuel) would create blackish smoke, not blue.
bluish colour smoke indicates oil .......
white smoke tends to indicate water vapour (steam) and if the exhaust smells "sweet", it could be a coolant leak.....

To 72 Shark:
Have you taken the car for a decent run, to clear out any condensate or oil contaminants in the exhaust system? Is it running smoothly? or can you notice some driveabilty issues?

Maybe all it needs is a decent run to clear it out.
Reply
Old Mar 5, 2009 | 12:53 AM
  #7  
J-Vett's Avatar
J-Vett
6th Gear
 
Joined: Mar 2008
Posts: 6
Likes: 0
From: lake jackson texas
Default

Sorry for any confusion. I changed out intake at the same time so maybe that had something to do with it. Best of luck on the smoke.
Reply

Get notified of new replies

To Lightly smoking engine





All times are GMT -4. The time now is 09:11 PM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE