Speedwagon Posted May 3, 2012 Share Posted May 3, 2012 '87 Brat with SPFI swap, brand new Subaru thermostat didn't fix the problem. The temp gauge is always above half, and climbing the mountains will make it go just below the red. It doesn't get that hot when sitting idle, only under load. If I stop the car, I can hear the fan turned on, so both the computer and dash gauge believe the car is hot. Water pump? Radiator? Really bad contacts on my sensors? Link to comment Share on other sites More sharing options...
ivans imports Posted May 3, 2012 Share Posted May 3, 2012 pluged rad pluged rad and pluged rad head gasket no pluged rad Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted May 3, 2012 Share Posted May 3, 2012 If Headgaskets are good; I Kindly Suggest you to do a Radiator Flush using a Chemical additive that removes the Dirt that the Radiator could have, then Rinse with enough Water and Finally pour Fresh Coolant. When a radiator remains with coolant and unused for Long times, the Coolant buildup sludge that can close the passages and Limit the flow. If that doesn't Help, the Radiator could be very Clogged and / or the Waterpump could be starting to Fail... Kind Regards. Link to comment Share on other sites More sharing options...
wentz912 Posted May 4, 2012 Share Posted May 4, 2012 Could also be that your timing is on the retarded side, when I had mine all jacked up it would get a little warm under heavy load. Link to comment Share on other sites More sharing options...
idosubaru Posted May 5, 2012 Share Posted May 5, 2012 classic radiator symptoms...time of year...and age - the car is a quarter century old. Link to comment Share on other sites More sharing options...
Speedwagon Posted May 5, 2012 Author Share Posted May 5, 2012 Yeah. While climbing tonight, I realized there is a built in test for the radiator... the heater core! Turn it on full blast, and if the car gets cooler, most likely it's the radiator. Link to comment Share on other sites More sharing options...
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