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Cooling Systems -- Problems & Solutions (Radiator, Fan, etc)

561 messages,  Last post on Nov 12, 2009 at 1:37 PM

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#534 of 561 Re: Air in cooling system or head gasket problem? [nthompson1] by Mr_Shiftright HOST Jul 28, 2009 (7:38 am)
Replying to: nthompson1 (Jul 28, 2009 5:31 am) No-- coolant doesn't have to be in the oil for a head gasket failure, although that is most common. But white smoke is a pretty good tip-off. You can also smell the coolant coming out of the exhaust. Best thing is a pressure test. Then you can pull a spark plug while the system is under pressure from the pressure pump, and look for coolant right on the plug. That's a sure way to know.
#535 of 561 Re: Air in cooling system or head gasket problem? [nthompson1] by obyone Jul 28, 2009 (3:09 pm)
Replying to: nthompson1 (Jul 28, 2009 5:31 am) An overheating motor is a sure cause for head gasket failure. Depending of course on how high the temperature peaked at.
#536 of 561 Electric Fan motor not turning off by oldmetal Aug 10, 2009 (11:35 am)
I have a 1999 lexus and the radiator fan motor will not shut off and drains my battery. Any help?? Thanks Replies to this message: kiawah (Aug 10, 2009 1:47 pm)
#537 of 561 Re: Electric Fan motor not turning off [oldmetal] by kiawah Aug 10, 2009 (1:47 pm)
Replying to: oldmetal (Aug 10, 2009 11:35 am) I don't have electrical schematics for your vehicle, but I would suspect the computer has inputs on engine temperature and vehicle speed and air conditioning on/off, and then when it senses it needs the fans on it turns on a fan relay(s).   You could have a defective relay which is burnt relay points, arc welded together. Without having electrical schematics and knowing it's draining the battery down, pull that relay while parked.
#540 of 561 Re: Strange cooling system issue [roger821] by joelc1 Oct 14, 2009 (8:06 pm)
Replying to: roger821 (Jan 03, 2008 5:10 pm) Sound to me like your thermstat is sticking open or your fans are running to long which might suggest a relay problem. I link www.radiatorsrus.com title for my parts
#541 of 561 Radiator Problem by trail03 Nov 04, 2009 (12:13 pm)
Had a few problems with a 99 camaro replaced the all the parts like the waterpump,sensor,therm,hoses,but not the radiator because it still looks good. I took all the air out of the radiator after leting it run for awhile it drives good but every morning i have to add water to the radiator about a 12 oz cup or more. The car does not smoke or overheat it runs good can someone tell me if this normal. Replies to this message: burdawg (Nov 04, 2009 1:35 pm) kiawah (Nov 05, 2009 4:36 am)
#542 of 561 Re: Radiator Problem [trail03] by burdawg Nov 04, 2009 (1:35 pm)
Replying to: trail03 (Nov 04, 2009 12:13 pm) No, it's not normal to keep having to put water (or coolant) in once it's properly filled up. You should have it pressure tested to see it the cooling system has a leak somewhere.
#543 of 561 Re: Radiator Problem [trail03] by kiawah Nov 05, 2009 (4:36 am)
Replying to: trail03 (Nov 04, 2009 12:13 pm) You could also have a leady head gasket, allowing coolant to seep into the cylinders and get turned to steam out the exhaust. This has the potential of ruining the engine and catalytic converter. Be sure you get the problem of having to add water diagnosed and resolved, whether it is a leaky radiator, a leaky water pump/hose, or a blown headgasket.

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