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Goodwrench9124
Goodwrench9124, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 3432
Experience:  Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer,Hrybrid certified
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1998 cadillac deville. what is the correct operating temperature

This answer was rated:

1998 cadillac deville. what is the correct operating temperature range for a Northstar V8?

Mine is running between 199-235 degrees. The fans operate correctly and the thermostat has already been changed.

operating temp should be 210

are you having a coolant loss?

Customer: replied 7 years ago.
No coolant loss. The cooling fans according to the scanner have to turn on at 223 on low degrees and at 227 degrees at high. Does that make any sense?

Hello, looks like the cooling fans are right on the money. here is the factory spec on fan turn on temps.

I hope this helps.

 

The PCM commands low speed fans ON under the following conditions:

Engine coolant temperature exceeds approximately 106°C (223°F).
The transmission fluid temperature exceeds 150°C (302°F).
A/C operation is requested.

The engine cooling fans will switch from low to OFF when the coolant temperature drops below 102°C (216°F).

The PCM commands High Speed Fans on under the following conditions:

Engine coolant temperature reaches 112°C (234°F).
The transmission fluid temperature is more than 151°C (304°F).
When certain DTCs set.

The engine cooling fans will switch from high to low, except when DTCs set, when the coolant temperature drops below 106°C (223°F).

Goodwrench9124, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 3432
Experience: Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer,Hrybrid certified
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