Running Temperature creep....
Thread Starter
Instructor
Joined: Dec 2005
Posts: 108
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From: Gainesville Florida
Running Temperature creep....
The running temp of my C4 used to be 193F. Over several years, the termperature has creeped up to where it now runs at 207F. I have flushed the system and replaced water pump (when I did the distributor). I have changed the thermostat to a 180, and it ran 7F cooler at 200F.
Common sense tells me this is the temperature sending unit on the water pump, but at the same time this seems to simple. Maybe I need a new radiator? Before I drain the fluid and replace the temp sending unit, I thought I would ask if anyone has encountered a similar problem and if this is normal? Recommendations?
Common sense tells me this is the temperature sending unit on the water pump, but at the same time this seems to simple. Maybe I need a new radiator? Before I drain the fluid and replace the temp sending unit, I thought I would ask if anyone has encountered a similar problem and if this is normal? Recommendations?
Thread Starter
Instructor
Joined: Dec 2005
Posts: 108
Likes: 0
From: Gainesville Florida
Yeah, that is a very difficult area to clean, but I did spray that area very well with a hose. Several years ago a plastic shopping bag got sucked up into that gap, and it caused my car to overheat.
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by ceberus
The running temp of my C4 used to be 193F. Over several years, the termperature has creeped up to where it now runs at 207F...
I thought I would ask if anyone has encountered a similar problem and if this is normal?
I thought I would ask if anyone has encountered a similar problem and if this is normal?
Originally Posted by ceberus
I have flushed the system and replaced water pump (when I did the distributor). I have changed the thermostat to a 180, and it ran 7F cooler at 200F.
RACE ON!!!
Thread Starter
Instructor
Joined: Dec 2005
Posts: 108
Likes: 0
From: Gainesville Florida
"The 180° thermostat is stock in the C4s with, LTx engines."
Really? I bought my car brand new in 1992, and I remember it always ran at 193F? It now runs at 207F with the original thermostat.
Really? I bought my car brand new in 1992, and I remember it always ran at 193F? It now runs at 207F with the original thermostat.
Melting Slicks
Joined: May 2005
Posts: 2,730
Likes: 1
From: Atoka Oklahoma
St. Jude Donor 06
Originally Posted by ceberus
"The 180° thermostat is stock in the C4s with, LTx engines."
Really? I bought my car brand new in 1992, and I remember it always ran at 193F? It now runs at 207F with the original thermostat.
Really? I bought my car brand new in 1992, and I remember it always ran at 193F? It now runs at 207F with the original thermostat.
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Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by ceberus
"The 180° thermostat is stock in the C4s with, LTx engines."
Really? I bought my car brand new in 1992, and I remember it always ran at 193F? It now runs at 207F with the original thermostat.
Really? I bought my car brand new in 1992, and I remember it always ran at 193F? It now runs at 207F with the original thermostat.
What seems to have changed with mine is that when new there was either no or maybe 1-2 degrees increase in temp when running the A/C in summer.....now it seems to increase the temp by as much as 4-5 degrees...
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by LT4BUD
What seems to have changed with mine is that when new there was either no or maybe 1-2 degrees increase in temp when running the A/C in summer.....now it seems to increase the temp by as much as 4-5 degrees...
RACE ON!!!
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by CFI-EFI
It must be time for a new radiator, a new condenser, a new evaporator, change the oil in the compressor, change the air in the tires and rotate the radio *****.
RACE ON!!!
RACE ON!!!
BTW 193 was the norm on my LT4 when new......after doing the unthinkable of running a 160 stat my norm changed to 173......