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

Blue smoke

Thread Tools
 
Search this Thread
 
Old Mar 20, 2023 | 05:21 PM
  #21  
7T3stinger's Avatar
7T3stinger
Thread Starter
Racer
Photogenic
Liked
Loved
Community Favorite
 
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Default

Originally Posted by AKjeff
Could be though I'd be surprised if it did it before and after the heads were off for new guides and seals.

Another thread here mentions heads with screw in studs that go into the intake runners. You may have one of those leaking.
It's a simple matter of pulling the screw in stud and putting some sealant on the threads, if your heads are constructed like that.

If you find one plug with oil on it it would indicate which stud it is.

Does the car smoke while decelerating?

Have you contacted the engine builder about this? I'd be curious what they'd have to say.
I have some plug pics up if you care to look at them.

Reply
Old Mar 20, 2023 | 06:13 PM
  #22  
AKjeff's Avatar
AKjeff
Pro
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2010
Posts: 596
Likes: 249
From: Carson Valley
Default

Originally Posted by 7T3stinger
I have some plug pics up if you care to look at them.
I don't think the plugs look bad, there is a bit of soot at the top of the threads.

If it were my engine I think I'd be looking at the intake manifold gasket.
Before pulling it apart you could inspect the intake runners with a borescope, they make them now that will link to a smart phone.

How much oil is it going through?
Reply
Old Mar 20, 2023 | 06:19 PM
  #23  
7T3stinger's Avatar
7T3stinger
Thread Starter
Racer
Photogenic
Liked
Loved
Community Favorite
 
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Default

Originally Posted by AKjeff
I don't think the plugs look bad, there is a bit of soot at the top of the threads.

If it were my engine I think I'd be looking at the intake manifold gasket.
Before pulling it apart you could inspect the intake runners with a borescope, they make them now that will link to a smart phone.

How much oil is it going through?
not much oil. I’m not a mechanic so i do t even know where to begin with doing that. Lol.
Reply
Old Mar 20, 2023 | 09:10 PM
  #24  
Stormin_Normin's Avatar
Stormin_Normin
Pro
All Eyes On Me
Liked
Loved
Community Favorite
 
Joined: Jun 2021
Posts: 505
Likes: 230
Default

Borescope is cheap and will tell you a lot. That’s the place to start.
Reply
Old Mar 20, 2023 | 09:29 PM
  #25  
7T3stinger's Avatar
7T3stinger
Thread Starter
Racer
Photogenic
Liked
Loved
Community Favorite
 
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Default

Originally Posted by Stormin_Normin
Borescope is cheap and will tell you a lot. That’s the place to start.
I’m not a mechanic and would t know what to do or where to start.
Reply
Old Mar 21, 2023 | 01:16 PM
  #26  
wwiiavfan's Avatar
wwiiavfan
Drifting
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Oct 2020
Posts: 1,566
Likes: 574
From: Wisconsin
Default

A borescope is just a mini camera that fits into tight spots like thru the spark plug hole or thru the top of the intake and into the intake runners. You’ll be able to see if there is wet oil clinging to surfaces where it shouldn’t be.
Reply
Old Mar 21, 2023 | 03:26 PM
  #27  
7T3stinger's Avatar
7T3stinger
Thread Starter
Racer
Photogenic
Liked
Loved
Community Favorite
 
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Default

Originally Posted by wwiiavfan
A borescope is just a mini camera that fits into tight spots like thru the spark plug hole or thru the top of the intake and into the intake runners. You’ll be able to see if there is wet oil clinging to surfaces where it shouldn’t be.
Yes I have researched this. But I wouldn't know what I'm looking at. Where through the top of the intake? Take the carb off? I will probably end up taking back to who built the engine. I posted plug pics hoping someone else had the same problem and could tell me if it may be a cracked intake gasket or maybe head gasket. Thanks.
Reply




All times are GMT -4. The time now is 04:21 AM.

story-0
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-1
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-2
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-3
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
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
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