Mechanics

CHEVY LOSES COOLANT

2000 Chevrolet Silverado

Engine Cooling problem
2000 Chevy Silverado V8 Four Wheel Drive Automatic 151000 miles

My low coolant light keeps coming on. I have no visable leaks I can see. I can't find any scaling anywhere. Today I bought new hoses for the upper and lower, as well as a new resivior cap. When I went to add coolant the cap seperated into two pieces. Could that have been where I was losing my coolant? Should I go ahead and change the hoses as well? If I get an air lock, how do it solve that issue. The radiator was replace about 2 years ago, but I don't think we did the hoses.
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Kcoonstx
November 19, 2008.




STOP! DO NOT START THE ENGINE UNTIL YOU DETERMINE THAT THE LOWER INTAKE MANIFOLD GASKETS HAVE NOT FAILED.
Check the oil for engine coolant ASAP! If the lower intake gaskets failedcoolant can freely flow into the engine undetected. Also, the oil cooler may have failed allowing coolant to enter the engine oil. The oil cooler is a coil inside of your radiator that flows oil through to cool it.

A failing hose will leak and you can see coolant or smell coolant around these areas. If coolant was leaking out if a broken radiator cap then you also would see or smell it. Let me guess -- You have pink anti-freeze -- Dexcool?
Do a computer search and type in - dexcool class action law siut. It may all make sense then.

Tiny
Pear69
Nov 19, 2008.
There is no coolant in the oil. And it isn't Dexcool. Already had to my issues with it. Transmission fliud in the radiator=new transmission.
I went ahead and replace the upper and lower hoses. We'll see if that does it.I guess it could have been to much water not enough antifreeze maybe it just boiled out. The class action suit isn't for 5.3L motors. Looks like it's only V-6's

Tiny
Kcoonstx
Nov 19, 2008.
WOW. From what I've read I guess I had the DEXCOOL sludge as well. To damn bad I missed the cut off date for reimbursment.I thought the transmission cooler went into the radiator and ruptured. Maybe I was wrong. Guess I'll have it pressure tested. Truck still runs great. No issues with overheating

Tiny
Kcoonstx
Nov 19, 2008.
I hope changing the hoses fixes your problem as well. And I hope you changed the radiator cap too. Dexcool was in your cooling system from the factory and may have caused the problems you are having now. You are right that your engine does not qualify for the law suit, I just wanted to make you aware of the fact that dexcool from GM is bad period. Dexcool from prestone is the best thing to use in newer chevys.
Be aware that the lower intake manifold gaskets will fail on your engine - it's just a matter of when. Keep a close eye for coolant leaks around where the valve covers and the lower intake meets. Coolant can leak there - undetected because it dries up quickly. Changing these gaskets is not cheap and it is a big job. There are a few things that should be done if this repair is in order, so keep me posted, and happy holidays.
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Tiny
Pear69
Nov 20, 2008.

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