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1978 Chevrolet Astro Repair Question


Topics covered: Radiator, Compression, Engine.
Mileage: No information provided.

Asked on June 19, 2011

Overheating 350 engine

I have a 359 chevy engine in a hot rod it is overheating. all new radiator (aluminum) thermostat (195) waterpump temp sending unit for a (dolphin) gauge and a elecric fan. any help with this problem will be appreciated thanks chuck
Avatar Asked by wingrider724

Answer

Replied on June 19, 2011

Is this a new problem or has it always existed? The first thing to check is if there is a shroud around the fan. Anything that lets air go around or over the radiator will reduce its effectiveness.

If the radiator is rather skinny, you may need a three-core unit with three rows of tubes instead of the more common two-core.

Tiny Answered by caradiodoc (expert)
17,655 answers provided
Replied on June 20, 2011

if you have a mechanical fan and it doesn'thave ashroud going to the radiator it willnot pull enough air to cool the car at idle or slow driving. Make sure your t-stat and rad cap are in good condition. If this has higher compression it willrun hotter. best is to have an electric fan mounted to rad to push the air through with a good sending unit/relay system.

Tiny Answered by hmac300 (expert)
18,724 answers provided