The fans do not come on until the engine is almost over heated. I by-pasted the relays to test and both fans work, high and low speed.Everything seems to work ok. It has a new water pump, new hoses, and the radiator was just flushed, and the coolant was replaced. It's not over heating, but it is getting very hot.
Gord storey, why don't you post your way of bleeding the air out so somebody like me would benefit from it and solve the issue since you have gone through the trouble of posting. i see a lot of posts on google but realy none worth following and they confuse tyou more. thanks
What would you like to know?
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I would look at the coolant temp with a scan tool the fans should come on when the coolant gets around 240 degrees. If the scan tool shows about 240 and the gauge shows higher than the gauge is the problem.
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SOURCE: 2001 Chevy Venture Cooling Fans always running on high
Check ur temp sensor the plug it's not plug to it or its bad
SOURCE: 1995 Chrysler Cirrus overheating
Probably not water pump. Engine is notourious for vapour lock.
Cooling system must be blead of air before thermostat will work. Cool bottom rad hose is a dead give away. If you are still watching this forum reply , and I will walk you through the only way I know how to make it work properly. It's actually easy if you do it my way. I have worked on lots of cars , and this engine was the hardest to bleed out. Did one Yesterday , and works perfect.
Testimonial: "I need help on how to bleed the system thanks"
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I got 240 (about) when the fans come on, Should they not come on sooner? That was my question can I adjust when they come on. I had a collapsed hose was the insula problem I changed the water pump out when I change the gasket also. Yes I got the air out. I also think the new T-stat is not opening all the way cause now (since I posted this) The heater only blows hot when I running about 45 mph.
There is no adjustment. The computer is programmed to turn the fans on at 240. The thermostat does not have anything to do with the heat. if the t-stat was not opening all the way you would have more heat, not less. There should be a bleeder screw on the pipe that comes out of the water pump housing. Make sure you open that with the engine running to let the air out of that pipe. That supplies hot coolant to the heater core. If you get heat at higher speed than there is still aire in the heater core or the heater core is starting to plug up. I would bet there is air.
I should clarify the thermostat. If the thermostat where stuck open you would get less heat but the engine temp would not get up to operating temp. If the thermostat where stuck closed you would get plenty of heat but the engine would also over heat.
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