97 cadillac deville - Engine Troubleshooting


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97 cadillac deville

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Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

zieman
Novice

Sep 10, 2010, 12:40 PM

Post #1 of 4 (2554 views)

97 cadillac deville	Sign In

ihave 97 cadillac deville 4.6L northstar over heating problems changed thermostat new coolant still overheats 220 - 237 any body no what temperature the fans are supposed to come on . right now they are coming on at 221degrees

Sidom
Veteran / Moderator
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Sep 10, 2010, 10:10 PM

Post #2 of 4 (2543 views)

Re: 97 cadillac deville	Sign In

Is the water pump belt in good shape??

You know, that one in the back of the engine that runs the water pump that everyone forgets about checking.........

Also that is the correct temp for the cooling fans to come on...............

mike zieman
User

Sep 11, 2010, 8:32 AM

Post #3 of 4 (2530 views)

Re: 97 cadillac deville	Sign In

belt is good head gasket maybe is there a easy way to confirm no obvious signs

Sidom
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Sep 11, 2010, 7:07 PM

Post #4 of 4 (2520 views)

Re: 97 cadillac deville	Sign In

No real easy way to test those. They have a remote reservoir so chemical testing isn't always accurate, meaning it might pass an engine with a blown head gasket. But there are other things that could cause this problem. A restricted radiator. The impellers on the water pump worn down, a restriction in the block....

Did this problem start out of blue or were there some signs leading up to this????.....running a bit warmer?? Any coolant lose???

I realize you did look at the water pump belt but probably would've felt better if you said BOTH belts were good... The main serp belt & then the little water pump belt in the back that runs off the camshaft...

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