Overheating
Overheating So my car was a v6 then i put a first gen sbc in it. It was freshly rebuilt and now it overheats. So far i have gotten a smaller water pump pulley, new 2" thick be cool radiator, new fan, new thermostat, and i put in a new water pump when i built it. I ran it and got all the bubbles out of the coolant. There isnt white smoke coming from my exhaust....could it be a blown head gasket without white smoke?? What else should i try?!
TECH Apprentice
Joined: Apr 2005
Posts: 319
Likes: 1
From: North Carolina
It's not a bad temp sender is it? That begs the question....are you using the gauge on the cluster or an aftermarket gauge? If it's the gauge on the cluster....how did you integrate it through the PCM and all?
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Rent a cooling system pressure tester from AutoZone, costs nothing when you return it.
It installs in place of your radiator cap, you pump it up to 16psi or whatever your cap pressure is, and then see how long it holds pressure.
It should hold for over an hour easily, but a bad head gasket or other failure will cause an immediate pressure dropoff as soon as you stop pumping it and you'll see that on the tester's gauge.
Let us know what you find.
It installs in place of your radiator cap, you pump it up to 16psi or whatever your cap pressure is, and then see how long it holds pressure.
It should hold for over an hour easily, but a bad head gasket or other failure will cause an immediate pressure dropoff as soon as you stop pumping it and you'll see that on the tester's gauge.
Let us know what you find.
Rent a cooling system pressure tester from AutoZone, costs nothing when you return it.
It installs in place of your radiator cap, you pump it up to 16psi or whatever your cap pressure is, and then see how long it holds pressure.
It should hold for over an hour easily, but a bad head gasket or other failure will cause an immediate pressure dropoff as soon as you stop pumping it and you'll see that on the tester's gauge.
Let us know what you find.
It installs in place of your radiator cap, you pump it up to 16psi or whatever your cap pressure is, and then see how long it holds pressure.
It should hold for over an hour easily, but a bad head gasket or other failure will cause an immediate pressure dropoff as soon as you stop pumping it and you'll see that on the tester's gauge.
Let us know what you find.
Yep do this and if it is losing pressure look for leaks. External should be obvious leaking and HG may leak but be internal....
Registered User
Joined: May 2010
Posts: 2
Likes: 0
From: Lafayette Indiana
Its possible you put the intake gaskets on backwards, the older small blocks should have a restrictions in the rear coolant passages. If you flip them and the restrictions in the front passages you cant flow enough coolant because the thermostat is also a restriction. I have seen this on a few small blocks that had been either rebuilt or had a new intake put on. There could be tags on the gaskets that stick out between the intake and cylinder head if they are at the front they should be on correctly. If your gaskets didn't have these restrictions then it doesn't matter.
