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sprinkles08, ASE Certified Technician
Category: Ford
Satisfied Customers: 22999
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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1992 T-Bird V8 - Overheats after driving 30-45 minutes.

Customer Question

1992 T-Bird V8 - Overheats after driving 30-45 minutes.
Replaced thermostat - Was 160 told because it had California Emission should use 190, so used 190. Still overheats. Fan is direct on water pump.
Submitted: 2 years ago.
Category: Ford
Customer: replied 2 years ago.
Replaced Radiator last summer due to seem leak
Expert:  sprinkles08 replied 2 years ago.
Hello and welcome to JustAnswer!
I see that the radiator was replaced a year ago but a restricted radiator is a very likely cause for the overheating. If cores become restricted it will effectively reduce the size of the radiator and cause overheating. There may have been contaminants in the radiator when it was installed or rust, etc from the rest of the cooling system may have gathered in the radiator over the last year.
Does it use any coolant with no visible external leaks?
You've removed the fan clutch and converted to a fan blade mounted solid to the water pump?
Customer: replied 2 years ago.
First, when the radiator was replaced the said the flushed the block.
There are no external leaks. The oil is normal brown/black color.
The engine seems to idle and run fine (no misses or roughness).
As for the fan, it was my attempt to say it was NOT electric; it does indeed have a fan clutch.
When engine is cold, there is NO free spin, it takes pressure to move fan at all.
Also there seems to be no wobble when wiggling fan blades.
Expert:  sprinkles08 replied 2 years ago.
Does it use any coolant with no visible external leaks?
Customer: replied 2 years ago.
Only when it overheats. Also has a 13lb. radiator cap.
Expert:  sprinkles08 replied 2 years ago.
If the coolant level is going down without an external leak then it's being consumed in the engine. This could be a head, headgasket or block issue. A head or gasket issue is most likely. A block test kit can be used to confirm a combustion leak, but if it's consuming coolant then there is no doubt it has an internal issue.
Customer: replied 2 years ago.
We have used the car on short trips 10-15 minutes, maybe 6-7 time in the last week since it last overheated and
when I check the coolant level this morning (car not used since last night) the levels in the radiator and overflow tank
were normal. There is NO consumption of coolant.
Expert:  sprinkles08 replied 2 years ago.
Your last post before this said that it did consume coolant.
When it's running hot do you hear the fan clutch engage?