1996 Cadillac Deville overheating

KALONJI-11

MEMBER
1996 CADILLAC DEVILLE
4.6L
V8
FWD
AUTOMATIC
105,395 MILES

I replaced radiator water pump thermotast. I also did headgasket test liquid stay blue. Does not smoke when running.

Tuesday, May 27th, 2014 AT 6:02 PM

8 Replies

JACOBANDNICKOLAS

MECHANIC
108,133 POSTS

Have you flushed the engine block? Does it overheat at highway speeds or only in town driving? Have you checked to make sure ignition timing is correct?

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Tuesday, May 27th, 2014 AT 6:11 PM

KALONJI-11

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5 POSTS

I can drive on highway for about 60miles temp goes from 196to217 city drive or idle it will go up from 197 to 222or higher

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Tuesday, May 27th, 2014 AT 6:22 PM

JACOBANDNICKOLAS

MECHANIC
108,133 POSTS

Are the cooling fans turning on?

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Tuesday, May 27th, 2014 AT 6:48 PM

KALONJI-11

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5 POSTS

Yes when I turn on heat or air they work

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Wednesday, May 28th, 2014 AT 9:36 AM

JACOBANDNICKOLAS

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108,133 POSTS

Do they turn on if the engine gets hot with the AC and heat off?

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Wednesday, May 28th, 2014 AT 9:44 AM

KALONJI-11

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5 POSTS

What temperature should it be for the fan's to turn on

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Wednesday, May 28th, 2014 AT 3:24 PM

JACOBANDNICKOLAS

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I believe it's around 215.

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Wednesday, May 28th, 2014 AT 5:44 PM

KALONJI-11

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They turn on at 222 but go off at 215 and does not drop until I drive. Also if I spray water on the coolant crossover with the radiator cap off the temp drop down to 190 to 196, and water level start flowing in the reservoir.

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Thursday, May 29th, 2014 AT 3:55 PM