Low operating Temp.
#1
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I have a 1991 Silverado with a 305 ci. engine and I can't get it over 150 degrees. I changed the thermostat 2 times and tried removing the fan.I also blocked off the radiator, all did not help. I by passed the heater thinking that might be doing it, but no good.My gauge is correct because I also put a test thermometer in the Rad. and both read the same. Any help will be appreciated.
#2
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I had a 90 that was like that and nothing had any affect on it. I replaced the lower heater hose and the troublesome connector that scews into the intake with a hose barb and it works great. Dont ask me to explain it.
#6
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does the heater blow hot? have you tested the gauge?? comparing a thermometer in the radiator to the dash gauge isn't accurate
heater and radiator hoses feel hot/warm to the touch?
heater and radiator hoses feel hot/warm to the touch?
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#8
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I have replaced the heater core. I bought a Stant thermostat. I flushed the system twice. I replaced both sensors. The coolant itself is just not hot. I believe the gauges are telling the truth. The heat is warm, at best. This all started when I replaced the intake manifold gasket. I have a friend who's truck did the exact same thing when he did the same job. There was an extra little pin hope in the new gasket and we think that's allowing enough coolant through to keep it cooler
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It did. But I noticed in the slot where the coolant flows to the heater core, there was an extra hole about the size of a skittle that wasn't on the original.
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