I have a 1998 Cadillac Seville SLS with 4.6 Northstar motor. Replaced thermostat, radiator, and water pump, also overflow cap. Still overheating, gauge reads above half way mark. No smoke from exhaust and no water or antifreeze in the oil. Please help, noone can figure out our problem. Thanks I have a 1998 Cadillac Seville SLS with 4.6 Northstar motor. Replaced thermostat, radiator, and water pump, also overflow cap. Still overheating, gauge reads above half way mark. No smoke from exhaust and no water or antifreeze in the oil. Please help, noone can figure out our problem. Thanks
gauage on 98 sts staying above half way when in idle and cooling most of the time when you drive. replaced radiator,thermostat,waterpump. No smoke from tail pipe and no water in oil. please helpgauage on 98 sts staying above half way when in idle and cooling most of the time when you drive. replaced radiator,thermostat,waterpump. No smoke from tail pipe and no water in oil. please help
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Is the temp gauge high?Does the car blow white smoke?Check the oil and see if you have antifreeze/water in the oil.You may have a blown head gasket.Im assuming you have a norhtstar motor.
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If everything checks out ok like coolant level and no leaks I would replace the temp sensor for the fans it should be on top and when you buy one look for it on the top of the engine and make sure the fans spin freely by hand with the key in your pocket and engine cold. If they don't spin real easy you may have to replace them.
i would have to say ck. the easast things first,when was the last cooling system flush making sure all cooling system parts are clean and new coolant added(old coolant looses its abilaty to work properly when old)then have the thermostat ck to make sure it opens and closes at the proper temp.
you have a blown head gasket.. doesn't have to have coolant in the oil for a blown head gasket... if hoses are rock hard when running then you have exhaust leaking into the coolant via a blown head gasket...
if you have no visible leaks and it is overheating then it sounds like you have a head gasket leak internally.the coolant is going some where .get the cooling system pressure tested to make sure you don`t have a leak externally.if the coolant is not leaking out the radiator then this indicates the thermostat is not stuck.what ever the problem is change the thermostat at the time of repair.
Check for coolant flow at the Purge line,this is a common problem on the Northstar. There is a small diameter hose coming from near the top of the coolant tank,this is the purge line. With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.
sounds like it might be low on coolant. Low coolant levels will stop the flow and circulation to the heater core, and also might be the cause of overheating
Please check the radiator it may be leaking or there may be hole in the coolant container or the sensor is defective get it checked ..................................
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I have a 1998 Cadillac Seville SLS with 4.6 Northstar motor. Replaced thermostat, radiator, and water pump, also overflow cap. Still overheating, gauge reads above half way mark. No smoke from exhaust and no water or antifreeze in the oil. Please help, noone can figure out our problem. Thanks
cadillac sts over heating and loosing coolant radiator fan not coming on
gauage on 98 sts staying above half way when in idle and cooling most of the time when you drive. replaced radiator,thermostat,waterpump. No smoke from tail pipe and no water in oil. please help
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