Overheating
#1
Overheating
I was looking through the forums but none were for my car. every so often my 99 cobra will overheat to above the centerline and will cause my coolant to bubble up and come out through the coolant tank. it leads me to beleive my thermostat occasionally gets stuck but im not an expert. any ideas? also if you can tell me what the best thermostat is to use, i was thinking of a 160 but if you think its not worth it, the 180 and everything i need to get my system functioning properly. i also need to know where the thermostat housing is located, noting that the 4.6 DOHC is different from the SOHC because its not up top where it claims to be located.
#2
Before you go and buy something you may not need I would check to see if its working first.
Get the car warmed up to normal operating temps. While its warming up feel the upper radiator hose. It would be cool and have no pressure to it. Once the car is at operating temp the hose should become hot and very firm. This is because the stat has opened up and is letting coolant flow through. If the upper hose never gets firm and hot then the stat has failed and is getting stuck. So check that first before you go out and buy anything.
Your car might just need a simple cooling system flush and some fresh coolant.
Get the car warmed up to normal operating temps. While its warming up feel the upper radiator hose. It would be cool and have no pressure to it. Once the car is at operating temp the hose should become hot and very firm. This is because the stat has opened up and is letting coolant flow through. If the upper hose never gets firm and hot then the stat has failed and is getting stuck. So check that first before you go out and buy anything.
Your car might just need a simple cooling system flush and some fresh coolant.
#3
ya i did all that but its only every once in a while that it actually overheats, normally it runs fine then all of a sudden it seems like it just sticks shut, i let it sit n works fine, so maybe a flush is in order, but i do want to put in a lower temp therm but i dont want to worry about my cooling fan being messed up from the temp changes.
#9
If you do get a cooler temp stat be sure to not go below 180*. Otherwise the car will never get up to operating temp and you will be in closed loop mode (warm up mode) and burn tons of extra fuel for no reason.
So 180* is the lowest you want to go.
There is also a guy that sells stats for the 4v cars that are supposed to be great. He modifies them to stay closed longer for faster warm up's and then open better for more flow or something for better control of the temps. Let me see if I can find it for you later on.
So 180* is the lowest you want to go.
There is also a guy that sells stats for the 4v cars that are supposed to be great. He modifies them to stay closed longer for faster warm up's and then open better for more flow or something for better control of the temps. Let me see if I can find it for you later on.
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