1992 Silverado overheating

[masterblaster1811]

Hey everyone

I have recently experienced problems with the cooling system on my silverado. In November of 03 I purchased another automobile. My truck sat up in the garage during this time. Prior to this, I had not experienced and cooling problems. The wife needed a new car so I gave her my new one and went back to my silverado.That's when the problem started. I installed new exhaust and intake gaskets, fan clutch, water pump, hoses and thermostat. The radiator is only a year old. Driving from my work to pickup kids at school ( 25 miles) the motor overheats(230Deg) I have tried everything I know. cant get it to run cool. Could setting up cause sediment to fill the bottom of the radiator ?.

[NWChevyGuy]

I wonder if there was something in the water when it sat. If so, maybe something is clinging to the small chambers inside the radiator, and it needs to be flushed. Maybe try a radiator flush. Good Luck!

[masterblaster1811]

I'M in the process of flushing the radiator with superflush. Have you ever tried Liquid glass Metalic block sealer?

[vnotaro]

Originally Posted by masterblaster1811

I'M in the process of flushing the radiator with superflush. Have you ever tried Liquid glass Metalic block sealer?

I've never heard of the Liquid Glass block sealer you mention but if is some kind of stop-leak product, I would stay away from it. These all have a tendency to seal small but vital channels where sediment has built up over the years and hasn't been flushed out. Not good. If flushing doesn't work, maybe a new radiator? Good luck.

[vnotaro]

Forgot to ask. You didn't mention where the year old radiator came from. Maybe not so new?

[masterblaster1811]

The radiator came from AUTOZONE!.

[broughy84]

I have used it to seal a cracked head and suprisingly it actually worked. I don't know if i would used it in a vehicle that has a overheat prob though.

Matt Brough
------------------
1998 Chevy Venture 89000mi
1988 Chevy Silverado 148000mi
1977 Chevy Scottsdale 20 275000mile -- NO REBUILDS!!! I love my old truck!

[mjgjr72]

have used liquid glass puts a heavy coating throughout metal in cooling system used to fix cracked block on s10 blazer would not recomment for anything other than squeezing out last few miles on vehicle with cracked head or block. would not recoment stop leak use at all enless you just can not afford to fix the leak. as for the overheat if it has orange coolant i have seen quit a few cases where it has become brown and pasty and clogged raidiators and heater cores. a heavy duty flush sometimes helps. other than that check the thermistat and clutch fan.

[tidalcock]

sounds as if the water is not circulating. just a wild guess, but when you removed the old water pump, was there a metal plate attached that could/should have been transferred to the new pump prior to installation? I encountered this years ago with and old Pontiac. Without the plate, the water would not circulate and the impellar simply cavitated, and yep, the car overheated.

[masterblaster1811]

The new water pump had the plate already installed. When I look inside the radiator with the engine at idle the pump is flowing its little heart out. I've heard about the orange coolant. The word from a Tech from Precision tune said they recieved a memo on the brown slime you see accumulating in the coolant tank.They jokingly called it pond slime. It does have a tendenance to breakdown and clog your radiator so only use it if you flush and refresh your system of coolant ever season. If not it's probably better to use the green type.

[desertmike1]

masterblaster1811,

Are you relying souley on instrumentation?

Or did you test your temperature with some other
means?

I would completely feel confident with my gauge before
dumping money!

just a thought-

Mike

[feac]

Change the coolant, I can list 10 things that could make your truck over heat. One of them is dirty coolant.
Thank you
Adam Forsythe