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Old 10-14-2003, 04:31   #1 (permalink)
1972 XA GS Fairmont
 
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Overheating

The 250 pre cross flow in my XA Fairmont is running hot. The radiator has been tested - flushed and recoed. The engine has thermo fans but it still overheats when it has been sitting round for 10 mins. This is making it really hard to cruise. What does anyone think is wrong with it? Should i turn the temp setting down on the thermo fans so they cut in earlier?
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Old 10-14-2003, 05:49   #2 (permalink)
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Re: Overheating

When you're cruising does it hold a decent temp up to a certain speed then suddenly get pretty hot?

My ED was behaving as if there was a "HOT" switch connected to the tacho at 2600rpm - as soon as the engine reached 2600rpm or above the temp just shot up - with revs back below 2600 it would settle down again real quick. Also when idling if the outside temp was above about 36 degrees it would progressively get hotter and hotter (below 36 degrees it was ok - fan would be screaming tho). I flushed the radiator, changed the thermostat, replaced the fan clutch - nothing had any effect - so in desperation I bought a brand new radiator and fitted it - BINGO - problem solved.
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Old 10-14-2003, 05:54   #3 (permalink)
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Re: Overheating

does it only overheat when sitting still? or when driving.. maybe check water pump flow and check if thrmostat is stuck open/closed.. if the thermostat has been removed completely, put one in to atleast restrict flow.. what does the gauge show when the thermo's kick in?
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Old 10-15-2003, 05:03   #4 (permalink)
1972 XA GS Fairmont
 
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Re: Overheating

It overheats when sitting still for around 10 mins. This is probally normal for an old car. When im driving the car the temp gauge sits half way in between cold and hot. Is this normal?
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Old 10-15-2003, 05:34   #5 (permalink)
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Re: Overheating

my xp temp use to go up two mainly because of the cam selection #3 and the thermo was two small 13``

only thing i can think is change the thermostat to a lower boiling point mine seemed to get hot to quick then have problem keeping up with the thermo fan it helped with mine
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Old 10-15-2003, 07:44   #6 (permalink)
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Re: Overheating

if it overheats just sitting there then the problem is in the radiator. it's either blocked or u dont have enough air flow. your guage running at halfway when driving is pretty much spot on from memory.

try lowering the cut-in temp of your thermo. if it still doesnt cope, either the fan is too small or your radiator is blocked.

even though it's an old car, it should never overheat under normal conditions. hope that helps
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Old 10-16-2003, 07:09   #7 (permalink)
1972 XA GS Fairmont
 
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Re: Overheating

The radiator just got flushed and it was 15% blocked. I'll try turning the cut in temp down. Thanks for your help.
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Old 10-20-2003, 22:34   #8 (permalink)
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Re: Overheating

Water pump ???? they impeller does wear out, if it is not circulating the coolant, it will of course over heat.

My 2 cents.

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Old 10-22-2003, 02:20   #9 (permalink)
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Re: Overheating

Quote:
Originally Posted by Dellboy999
Water pump ???? they impeller does wear out, if it is not circulating the coolant, it will of course over heat.

My 2 cents.

Dellboy999
Hooboy do I know about that!

Hope the XA's problem gets fixed.

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Old 01-26-2004, 23:14   #10 (permalink)
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Re: Overheating

i got this same problem on my XP falcon (running the same style XA/XB non x-flow engine) cant idle for more than 10mins (15 or so in winter) without her boiling!

parents owned the car before me, and it's always dont it, even after the new radiator. so my theory is somethings up with the water pump.

sorry for the thread mine :)
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