cooling system quandry
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Joined: Dec 2002
Posts: 560
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From: FL
2000 S500 Brilliant Silver, 1990 BMW 735iL, 1971 Pontiac Trans Am 455 HO, 1976 Pontiac Formula 400
cooling system quandry
system quandry
My 2000 S500 has approx. 165k miles on it and one day last week started running hot , fairly close to redline. I ran it home on the highway, hoping the airflow would cool it down, but it did not.
Checked coolant, fan and oil level. All are fine.
So I bought a water pump. thermostat and coolant. Today, I am flushing the coolant and while running the car with less coolant in each flush cycle, the car won't run hot any more.
I took it fore a 10-15 minute drive after several flush cycles now basically pure water and it still didn't go over 90C.
Now, I am not sure I should bother with the hassle and expense of installing the water pump if it is not needed. Maybe just install new thermostat and coolant.
Any ideas what is going on with the cooling system? The coolant I removed did not look bad or cruddy at all
My 2000 S500 has approx. 165k miles on it and one day last week started running hot , fairly close to redline. I ran it home on the highway, hoping the airflow would cool it down, but it did not.
Checked coolant, fan and oil level. All are fine.
So I bought a water pump. thermostat and coolant. Today, I am flushing the coolant and while running the car with less coolant in each flush cycle, the car won't run hot any more.
I took it fore a 10-15 minute drive after several flush cycles now basically pure water and it still didn't go over 90C.
Now, I am not sure I should bother with the hassle and expense of installing the water pump if it is not needed. Maybe just install new thermostat and coolant.
Any ideas what is going on with the cooling system? The coolant I removed did not look bad or cruddy at all
