C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Another white smoke guessathon....

Thread Tools
 
Search this Thread
 
Old Oct 13, 2004 | 02:47 PM
  #1  
mn_vette's Avatar
mn_vette
Thread Starter
Melting Slicks
20 Year Member
Liked
 
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
Default Another white smoke guessathon....

Idling the car at the drive thru I noticed smoke comming out of my hood. White smoke. I got home and popped the hood and watched it idle and there was a whole ton of smoke comming out of my valve cover breather and my pvc hole(removed). There was also white smoke out of the exhaust too. But when I rev the car the smoke seems to stop comming out of the top of the engine.

Lets start the guessing at possible causes.


Here's the history on the engine. I blew my bottom end(393ci) so I bought a junkyard LT1 engine and swapped my heads and cam onto it. Brand new felpro preformance gaskets. Its been running since last thrusday. The engine compression tested just fine before I got it. It could have been smoking and I just didn't notice it. The other thing is that I put my turbo kit on the car and ran that for a few days but messed up the oiling to the turbo so it locked up and I removed the kit and am now running n/a.
Reply
Old Oct 13, 2004 | 02:52 PM
  #2  
Cherry6speed's Avatar
Cherry6speed
Burning Brakes
 
Joined: Dec 2003
Posts: 770
Likes: 0
From: Madison Mississippi
Default

Sorry to hear about your troubles. Sounds to me like a blown/cracked head/gasket. Must be pretty bad to blow out under the cover.
Reply
Old Oct 13, 2004 | 05:01 PM
  #3  
eptaylor's Avatar
eptaylor
Instructor
 
Joined: Jun 2004
Posts: 249
Likes: 0
From: clinton ut
Default

My guess is dirty, gummy, stuck rings causing way too much blow by and valve covers are a good escape.
Reply
Old Oct 14, 2004 | 11:29 AM
  #4  
mn_vette's Avatar
mn_vette
Thread Starter
Melting Slicks
20 Year Member
Liked
 
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
Default

Anybody else have a guess??
Reply
Old Oct 14, 2004 | 11:34 AM
  #5  
tjwong's Avatar
tjwong
Le Mans Master
Supporting Lifetime Gold
20 Year Member
 
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Default

Originally Posted by mn_vette
Anybody else have a guess??

Did you check the oil for moisture being present? Like lots of condensing goo on the oil cap or on top of the valve covers? I am sure you changed the oil on that engine before running the turbo right?
Reply
Old Oct 14, 2004 | 11:47 AM
  #6  
mn_vette's Avatar
mn_vette
Thread Starter
Melting Slicks
20 Year Member
Liked
 
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
Default

Originally Posted by tjwong
Did you check the oil for moisture being present? Like lots of condensing goo on the oil cap or on top of the valve covers? I am sure you changed the oil on that engine before running the turbo right?

Ummmm, yeah. The engine was sitting for a while and they drained the oil out when they pulled it. I would have run fresh Mobil 1 anyways even if that weren't the case.

The oil cap has the breather in it so I'd have to pull the valve covers. Haven't done that yet. What would moisture indicate?
Reply
Old Oct 15, 2004 | 01:03 PM
  #7  
mn_vette's Avatar
mn_vette
Thread Starter
Melting Slicks
20 Year Member
Liked
 
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
Default

Yeah, it must be a head gasket. I ran my friend in his eclips gsx last night and the car wouldn't start after the race. Once we did get it started it had some issues with power. So it looks like I broke the car for the 5th time this season and now its going away for the winter. This really sucks!!!
Reply
Old Oct 15, 2004 | 02:17 PM
  #8  
rick lambert's Avatar
rick lambert
Le Mans Master
10 Year Member
 
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Default

Time for another compression test
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Oct 15, 2004 | 02:22 PM
  #9  
joalyons's Avatar
joalyons
Racer
20 Year Member
 
Joined: Feb 2001
Posts: 276
Likes: 0
From: Springboro OH
Default I vote Water

Im with Rubyred I think your getting water in the combustion chamber somehow, probably a head gasket issue. Are you sure that when you blew your intital motor something didnt crack a head? I would take out all the plugs and turn the motor over looking for water or some mosture in the combustion chamber.
Reply

Get notified of new replies

To Another white smoke guessathon....





All times are GMT -4. The time now is 04:07 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE