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I have a 98 grand marquis that is intermitly overheating? No…

Customer Question
I have a 98...

I have a 98 grand marquis that is intermitly overheating?

Mechanic's Assistant: Have you checked the coolant? Have you checked for a leak in the cooling system?

No sys leak. new sender unit, new fan relay, new thermostat, sys purged 2x??!!

Mechanic's Assistant: Are you fixing your Grand Marquis yourself? What have you tried so far?

See above

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

New anti freeze. the fan comes on like its working also the outlet hose has pressure on it.

Submitted: 10 months ago.Category: Mercury
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Answered in 1 minute by:
10/5/2017
Mercury Mechanic: Jaybird61, ASE Certified Master Technician replied 10 months ago
Jaybird61
Jaybird61, ASE Certified Master Technician
Category: Mercury
Satisfied Customers: 2,318
Experience: Automotive Instructor at Palm Beach State College
Verified

Hi, My name is Jay

Have you been getting low on coolant with no external leaks?

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Customer reply replied 10 months ago
no
Mercury Mechanic: Jaybird61, ASE Certified Master Technician replied 10 months ago

Then you will need to have the radiator checked across the core surface to see if there are cold surfaces indicating some clogged internal radiator cores. If you find cold spots then replace radiator.

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Mercury Mechanic: Jaybird61, ASE Certified Master Technician replied 10 months ago

If there is no cold spots on the radiator core then you will need to replace the water pump since it is not flowing enough coolant through the cooling system. I would recommend replacing the water pump with the radiator if it is clogged.

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Mercury Mechanic: Jaybird61, ASE Certified Master Technician replied 10 months ago

Let me know if you have any other questions? If not, please accept answers and rate me 5 stars so i can get credit for helping you today. Thanks.

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