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fuzzy1
User
May 22, 2010, 2:47 PM
Post #1 of 6
(1458 views)
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overheating
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Sign In
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Hello again, I have a friend with a 1997 Mercury Sable 3.0 dohc with over 300,000 miles. He bought it at auction and it ran great for 3 days and then the a/c compressor clutch gave out. He replace the clutch and after reassembling the engine now overheats. He then replaced the thermostat and no luck. The cooling fans are working. There is no heat coming out the the vents in the dash suggesting a air pocket in the system. We removed the heater hoses and blew air in the heater core and no restrictions. Tried filling the block up through the heater core return hose and reassembled. No luck, still overheats. Im thinking plugged radiator or bad water pump? Done some reading on Mercury forum pages and seems that everyone says water pump should be replaced every 50,000 miles and also many ppl having problems with clogged radiators. Of course these ppl in the same postings said after changing those parts it still over heated. Any new info would help Thanks, Fuzzy
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 22, 2010, 3:33 PM
Post #2 of 6
(1454 views)
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Was the A/C working for the 3 days it ran great? Is that now just working after the clutch? No heat suggests low coolant level still which would also cause overheating. Plugged radiator or impellers of water pump would come on slowly, usually. Is the general air temperature wildly different after the first few days? Feel heater hoses with heater on full temp request and lowest fan. If one is hot and other stone cold core could be plugged. Air is no test as that will pass where liquid wouldn't. How hot of an overheat has this now been exposed to? Boil over? T
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fuzzy1
User
Jun 6, 2010, 6:04 PM
Post #3 of 6
(1418 views)
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Sorry for the long delay. Site would not let me sign in password. So to answer last reply, yes the a/c worked for the three days prior to new clutch installation. Cooling fans working. Tried filling block through heater hoses at heater core. Still runs hot and by running hot im talking boil over. We did have steady heat for a short time, maybe 5-6 minutes, then lost heater and started over heating. Never regained heat and yes one heater hose is now cold and the other is hot.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 7, 2010, 3:19 AM
Post #4 of 6
(1412 views)
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Sorry for sign in problems. Stuff happens and I can't I can't help that So far liquid is not available for cooling IMO and is required. Boiling anything is a gas a NG. Head gasket or still overheating likely plugs would show evidence, T
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fuzzy1
User
Jun 7, 2010, 5:58 PM
Post #5 of 6
(1400 views)
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True, plugs would show something,but I tried head gasket leak detector.. you know blue chemical turns yellow upon finding exhaust gas in cooling system and found nothing.. I will check plugs just to see.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 7, 2010, 10:18 PM
Post #6 of 6
(1393 views)
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Car has 300,000 miles so anything is possible, Best bet is vapor is trying to cool it which it won't for whatever reason, T
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