1987 Nissan Truck overheats only when climbing hills

1987 NISSAN TRUCK
87,000 MILES • 4 CYL • 2WD • AUTOMATIC
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BUBA
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my nissan is overheated when climbing hills. once in a while there is a very small moister under oil cap. I can drive it all over and it is fine until I climb. There is no external leaks. otherwise runs good. is it a head gasket going out or the intake gasket. how can I find out.
Jun 18, 2009 at 2:36 AM
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MHPAUTOS
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Hi there,

I would first have the radiator cleaned & flow tested by a radiator shop, i feel that it may be part blocked, replace the thermostat as well and if the engine is fitted with a viscous fan coupling have this checked as well.

mark (mhpautos)
Jun 18, 2009 at 2:42 AM