Dear Ralph: I have a 1995 Indy XLT and the head gasket keeps blowing out. What is the solution to this problem? You’ve got...

Dear Ralph:

I have a 1995 Indy XLT and the head gasket keeps blowing out. What is the solution to this problem?

You’ve got one of two problems. Most likely is that the water (coolant) filter is partially blocked (plugged) and the coolant flow is reduced. This reduction in coolant flow causes the water temperature in the engine to get too hot. The temp light comes on, and not too much later the head gasket blows. Coolant flow may only be reduced by 40%, and this may take a while to happen, but the filter is the first place to check.
Take a look in the coolant overflow bottle for some black stuff (residue left over from blown head gaskets). If there is black stuff in the bottle the filter is probably plugged full of the same debris (filter is located between the overflow bottle and the water pump). Drain and flush the entire coolant system, replace the filter, and refill with fresh premix.
Also check the cylinder head and block for warpage. Head and block surface should be within .003″ variance. Never seen a warped block though.

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