1990 Geo Prism

BEVTURNERARNP

MEMBER
1990 GEO PRIZM

I bought a 1990 Geo Prism 3 years ago. When I bought it the mileage was 17,000 and it was in great condition. I bought it from a friends 85 year old mother and it has some sentimental value to me. It is a 5 speed with a 4 cylinder engine. Recently it began overheating and now most likely has a blown head gasket. About 2 years ago the radiator had a leak and I had that replaced. My question is, should I have the blown head gasket fixed or go with a rebuilt engine? The current mileage is 100,000. I've read on your site that it may be better to replace the engine due to possible other damage that could have been done during the overheating. Also, what would be a ball park cost to replace the engine versus repairing the head gasket? Thanks for your great site! I plan on telling all my friends about it!

3 Replies

MMPRINCE3000

MECHANIC
133 POSTS

I would probably replace the head gasket as long as there is no coolant in the oil pan and the head is not warped. Coolant in the oil will wash the bearings. In this case you would be better off replacing the engine.

A head gasket replacement at a dealer will generally run $800 or more. If the head is warped they will probably replace it, add about $1,000.

You could buy a used engine at a junk yard for $5-600, but you will most likely never find one with 17,000 miles.

Best advice is to call around and get estimates.