Question about 1999 Cadillac DeVille

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Engine coolant is fine until I drive my car up a 700 foot hill. Three times it has gonefrom 203 to 260 in a matter of three minutes. Themostat was just changed. 61 K on car , fans are operating normally. Coolant comes out of the overflow. Doesn't appear to come our of block gasket

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Radiator may be plug up. that what it sound like

Posted on Jul 17, 2009

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Posted on Jan 02, 2017

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How to replace thermostat on holden nova 7a-fe


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The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
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1 Answer

Temp guage goes to max (right) when engine is cold.


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1 Answer

Car won't idle after I gas up


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many thanks

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Hi,
The heating up as you build revs, to me, indicates a partially oped thermostat. If it hasn't been replaced, I would do so. It's inexpensive and easy enough to do. Make sure you get a gasket with it.
The rattling thing is another matter. Do you think it is the water pump that is rattling? Does it ever drip from under your engine all the time?
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Hope this helps... Good luck!

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1 Answer

Loosing power at cruising speed


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Idle? Fuel Pump? Tune Up? Sensor? Please Help!


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