Question about 1991 Oldsmobile Cutlass Ciera

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Frost plug locations for 1991 gmc 3500hd

My trucks thermostat froze. I then noticed a small drip on the passenger side. I then grabbed the two hoses that lead to the firewall to see if the clamps needed tightening. They were fine. Followed one to the top of the motor this also fine. The truck then began to have a good steady leak. It wasn't pouring out like the loss of a frost plug. Told that it could be that the frost plug had rusted and not completely blown out. I have no idea on how or where the location of the frost plugs are for replacement. Information on how many there are can also help. Tried to trace the antifreeze back and all I could see is a drip off a bold head mounting the starter. A loose starter bolt could not lead to this problem. This is a confuessing problem.

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That starter brace is very near a frost plug there are 2 frost plugs on each side of your block about 4 inches up from your oil pan where it bolts to the block they are about the size of a silver dollar .. thanks Jerry holler if you need more

Posted on Jan 29, 2009


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Frost plug locations for 1991 gmc 3500hd

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