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If the thermostat isn't opening, then coolant is never exchanging between the block and the radiator, so your water neck will always be the temp of the coolant in the radiator. I would use your thermometer to check the temp of your intake and heads.The only way the fan can be over-cooling if the thermostat is not opening, is if it is pushing enough air over the block to air-cool it (like a motorcycle or old VW engine). If that's the case, I would begin to suspect how well the engine is running
These may sound ludicrous, but (1) how are the heater hoses plumbed, and (2) what happens if you pinch off the heater hoses?
Quote from: bd on June 17, 2015, 10:53:14 PMThese may sound ludicrous, but (1) how are the heater hoses plumbed, and (2) what happens if you pinch off the heater hoses?The proper way... 3/4 to pump
Quote from: enaberif on June 17, 2015, 11:27:55 PMQuote from: bd on June 17, 2015, 10:53:14 PMThese may sound ludicrous, but (1) how are the heater hoses plumbed, and (2) what happens if you pinch off the heater hoses?The proper way... 3/4 to pumpSo does clamping off coolant flow through the heater have any effect whatsoever?
Well ironically when I pull the fan off the thermostat will open just fine and work as normal. What would cause a vehicle to not run right to cause this though? You are basically saying the engine itself is running cool.
Quote from: enaberif on June 17, 2015, 11:27:55 PMWell ironically when I pull the fan off the thermostat will open just fine and work as normal. What would cause a vehicle to not run right to cause this though? You are basically saying the engine itself is running cool.Usually an engine will run cooler than normal if it's running rich, it's not firing all cylinders, or the outside ambient temp is very low.Being June, we'll assume it's not below freezing outside. Running that rich I would expect you'd notice black smoke from the tailpipe. I've seen engine run on only one bank and still feel fairly smooth, so you might check the temp of the exhaust manifold near each valve, those should be decently consistent.
kind of going of what tim said but just curious whats your timing set at?