waterpump or thermostat?
#1
waterpump or thermostat?
This isn't exactly fort a ranger, its for my tempo. Its a '94 and has the 2.3 and when I'm driving as long as i'm moving my temp guage stays down but when I sit still it starts to rise. Then when I start moving again the temp guage goes back down. Is this the water pump or thermostat?
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Details, details, details. Generally, if it is overheating at idle, it is the pump. If it overheats while cooking down the road, it is the radiator.
The idle BTUh is a lot less, so the rad can dump it easily. OTOH, the road speed BTUh is a lot more, so the rad has a lot more to do. If both are bad, well... you figure it out.
tom
The idle BTUh is a lot less, so the rad can dump it easily. OTOH, the road speed BTUh is a lot more, so the rad has a lot more to do. If both are bad, well... you figure it out.
tom
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You can order one of the round Autometer gauges at Autozone, Summit, or other places. I think they are available in three or four, maybe more different styles. White face, black face, digital, analog, ultralite, etc. I just got a white face, round, analog, something like 2 1/16 inch diameter gauge. They are only about $10 more or so than the Sunpro that Autozone carries in stock. Get an electrical unit. The sender is included.
I am not familiar with your engine, but certainly it should be above 180 degrees, and I would think below 205.
I am not familiar with your engine, but certainly it should be above 180 degrees, and I would think below 205.
Last edited by 46yblock; 04-04-2006 at 02:50 PM.
#11
If it's had mainly water for cooling, I would pull the water pump. I've seen them rust off the impellers. Another problem is the impeller gets loose from the shaft and does'nt turn as fast as it should. Another thing you can do is to back flush the system. Don't back flush into the radiator. Do the engine and radiator seperatley.
Many factors affect where the worse cooling occurs.
Water flow speed, if too fast will not allow the heat to be pulled by the radiator.
Air flow thru the rad is important, at an idle only the fan is moving the air. Above approx 40 mph, you don't need a fan. If all you did was start up, jump on the express and then get off and park, you'd never miss it. There is two factors to air flow, one is the opening for entering and the other is the ability of the passed thru air to escape. Engine swaps that can become a problem.
Many factors affect where the worse cooling occurs.
Water flow speed, if too fast will not allow the heat to be pulled by the radiator.
Air flow thru the rad is important, at an idle only the fan is moving the air. Above approx 40 mph, you don't need a fan. If all you did was start up, jump on the express and then get off and park, you'd never miss it. There is two factors to air flow, one is the opening for entering and the other is the ability of the passed thru air to escape. Engine swaps that can become a problem.