ls1mike
$50 Site Donor 2025
Originally Posted By: ArrestMeRedZ
Steve, Mike, let the madness end. I have a '97 5.7 Vortec with the wet intake manifold. I have been absoloutely, um, what's the word without being censored, meticulous?, about maintenance. I expected to get 300k miles on it before unbuttoning the engine. At 65k it began leaking coolant. I changed out the IMGs and noticed the radiator and other passages were clean as a whistle, probably because the coolant was never allowed to get low. The gasket itself looked like acid had been poured on it around some of the coolant passages.
The gaskets and Dexcool were simply incompatible. The gaskets themselves may have been weak, but I am convinced they would have lasted close to 300k with just about any other coolant, just like any other well maintained small block Chevy.
I also got ahold of a 3.4 in an Alero. It had a leak in the thermostat bypass pipe (really weak design), and the IMG bolts had worked loose. Massive leaks. The IMG itself showed no damage, so that problem can't be contributed to the gasket or Dexcool.
I've had no problems with high mileage 6.0L or 5.7L LS1 Chevys with a dry manifold.
You can say what you want, but Deathcool was a problem in the earlier years becase of an incompatibly with the IMGs. Unless you can prove they changed the IMG materials starting in '96, you can't make a rational argument that there was nothing wrong with Dex. The fact it works well with a huge number of engines with a dry intake manifold had no bearing on what it did with 1996-2004 wet manifolds.
If I had maintained my truck poorly, I could understand having problems. I didn't.
That is what I said just not in so many words. Forgot the 5.7 had the problem also, 4.3 was just a 5.7 minus two pistons.
If they had fixed the gaskets I imagine there would have been less failures. Platic framed gaskets were bad. The GTP/GS board I am has had a bunch of guys switch to the metal Fel-pro and run the Dex with no issue, but it is the updated formula.
I have to believe it was a combination of things.
I just got rid of dex in the Buick as it was not worth putting it back in becuase it did the radiator when did I the gasket and made sure there was no dex left.
Steve, Mike, let the madness end. I have a '97 5.7 Vortec with the wet intake manifold. I have been absoloutely, um, what's the word without being censored, meticulous?, about maintenance. I expected to get 300k miles on it before unbuttoning the engine. At 65k it began leaking coolant. I changed out the IMGs and noticed the radiator and other passages were clean as a whistle, probably because the coolant was never allowed to get low. The gasket itself looked like acid had been poured on it around some of the coolant passages.
The gaskets and Dexcool were simply incompatible. The gaskets themselves may have been weak, but I am convinced they would have lasted close to 300k with just about any other coolant, just like any other well maintained small block Chevy.
I also got ahold of a 3.4 in an Alero. It had a leak in the thermostat bypass pipe (really weak design), and the IMG bolts had worked loose. Massive leaks. The IMG itself showed no damage, so that problem can't be contributed to the gasket or Dexcool.
I've had no problems with high mileage 6.0L or 5.7L LS1 Chevys with a dry manifold.
You can say what you want, but Deathcool was a problem in the earlier years becase of an incompatibly with the IMGs. Unless you can prove they changed the IMG materials starting in '96, you can't make a rational argument that there was nothing wrong with Dex. The fact it works well with a huge number of engines with a dry intake manifold had no bearing on what it did with 1996-2004 wet manifolds.
If I had maintained my truck poorly, I could understand having problems. I didn't.
That is what I said just not in so many words. Forgot the 5.7 had the problem also, 4.3 was just a 5.7 minus two pistons.
If they had fixed the gaskets I imagine there would have been less failures. Platic framed gaskets were bad. The GTP/GS board I am has had a bunch of guys switch to the metal Fel-pro and run the Dex with no issue, but it is the updated formula.
I have to believe it was a combination of things.
I just got rid of dex in the Buick as it was not worth putting it back in becuase it did the radiator when did I the gasket and made sure there was no dex left.
