I've done everything except tear apart the engine. Help! Overheating!
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Man, everything sounds good so far.......especially the fact that your plugs don't look like they've been steam cleaned. This must be soooo frustrating!
One stupid question: Are you sure that the serpentine belt is installed correctly, and the water pump is turning in the right direction?
One stupid question: Are you sure that the serpentine belt is installed correctly, and the water pump is turning in the right direction?
Thread Starter
Melting Slicks
Joined: May 2008
Posts: 2,606
Likes: 355
From: Rochester New York
Well I am exhausted and at a very big loss here.
After pulling both heads, sending them to an engine shop to get milled and pressure checked, cleaning and inspection the block, cylinder walls, and pistons, reinstalling the heads with new gaskets and bolts, the darn thing still overheats.
WOW!
Block leak tester does not turn from blue to yellow. Its gotta be a crack in the block that I could not see.
After pulling both heads, sending them to an engine shop to get milled and pressure checked, cleaning and inspection the block, cylinder walls, and pistons, reinstalling the heads with new gaskets and bolts, the darn thing still overheats.
WOW!
Block leak tester does not turn from blue to yellow. Its gotta be a crack in the block that I could not see.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Well I am exhausted and at a very big loss here.
After pulling both heads, sending them to an engine shop to get milled and pressure checked, cleaning and inspection the block, cylinder walls, and pistons, reinstalling the heads with new gaskets and bolts, the darn thing still overheats.
WOW!
Block leak tester does not turn from blue to yellow. Its gotta be a crack in the block that I could not see.
After pulling both heads, sending them to an engine shop to get milled and pressure checked, cleaning and inspection the block, cylinder walls, and pistons, reinstalling the heads with new gaskets and bolts, the darn thing still overheats.
WOW!
Block leak tester does not turn from blue to yellow. Its gotta be a crack in the block that I could not see.
Drifting
Joined: Sep 2007
Posts: 1,643
Likes: 50
From: Goldsboro NC
Man, everything sounds good so far.......especially the fact that your plugs don't look like they've been steam cleaned. This must be soooo frustrating!
One stupid question: Are you sure that the serpentine belt is installed correctly, and the water pump is turning in the right direction?
One stupid question: Are you sure that the serpentine belt is installed correctly, and the water pump is turning in the right direction?
.
Thread Starter
Melting Slicks
Joined: May 2008
Posts: 2,606
Likes: 355
From: Rochester New York
As frustrating as it is, its all a step by step process and its just one of those rare things no one ever sees. I will keep posting when we decide what were going to do.
I wish it was on wrong! I'd be able to sleep if it was that simple.
Team Owner
Joined: Jan 2004
Posts: 22,185
Likes: 65
From: NJ
Take all the spark plugs out of the engine, pressurize the cooling system and let it sit for 15/30 minutes. Drape newspaper or some other paper in front of the plug holes and crank it over. If you have a head gasket leak into the coolant, you will get a spray of coolant when you crank it over. The paper will help identify what cylinder it came from by catching the coolant.
**EDIT**
OK, saw the rest of the thread.
Did you check the water pump impeller?
**EDIT**
OK, saw the rest of the thread.
Did you check the water pump impeller?
Thread Starter
Melting Slicks
Joined: May 2008
Posts: 2,606
Likes: 355
From: Rochester New York
Take all the spark plugs out of the engine, pressurize the cooling system and let it sit for 15/30 minutes. Drape newspaper or some other paper in front of the plug holes and crank it over. If you have a head gasket leak into the coolant, you will get a spray of coolant when you crank it over. The paper will help identify what cylinder it came from by catching the coolant.
**EDIT**
OK, saw the rest of the thread.
Did you check the water pump impeller?
**EDIT**
OK, saw the rest of the thread.
Did you check the water pump impeller?
After replacing the head gaskets, the coolant does flow better. All the hoses are equal temps now and I get heat out of the heater. But she still boils over inside the engine.
I almost wonder if the head gasket was the original problem, the over heating just created another. Not really sure what to do at this point. Sales is working on getting the customer into another 'Vette. So I'm hanging tight and clearing my head before I dig back in.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Advanced
Joined: Jul 2008
Posts: 73
Likes: 0
From: Leesburg Florida
Had a heating problem once that was caused by a restricted/crushed exhaust pipe backing up the exhaust. Started and ran fine until about 60 mph. Probably has nothing to do with this problem, but just something to take a quick look at. I think a crack in the block will result in a loss of coolant.
