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?
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.
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?
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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