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

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

You are in the Maintenance & Repair Forum. Your Host is mr_shiftright

What is this discussion about? Engine


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#88 of 561
Re: 1989 Cadillac Coolant Leak [lemko] by Mr_Shiftright HOST
Aug 01, 2005 (7:10 am)
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Replying to: lemko (Jul 30, 2005 9:56 pm)

Blown head gaskets don't necessarily put coolant into the combustion chamber...they can leak externally, depending.
 
I wasn't thinking "cracked block" but rather that the freeze plug might have been pushed a little over the years....also, they just corrode over time.
 
Anyway, maybe you should have your cooling system pressure tested--that often reveals problems. Under pressure, and with the aid of a lift and/or good lighting, you might be able to spot the problem.
#89 of 561
Taking it to the shop... by lemko
Aug 01, 2005 (9:05 am)
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...tomorrow. Will let everyone know what happened. I believe it's a freeze plug too, but I could be wrong. The car doesn't leak when the car is running, but as soon as I shut it off and the engine cools, the leak happens. I'm sure to clean it up because there is a cat who wanders around and I don't want her to drink it and get sick. Animals are attracted to the stuff for some reason.
 
I don't drive the car very often. It is garaged and kept covered in a dry environment. It doesn't see snow or rain. Maybe something happened from it sitting so long. My girlfriend's brother from Colorado wanted to see the car so I took it out for the first time since early June. Fortunately, he didn't see the leaking fluid. It would've been embarrassing.
#90 of 561
chronic overheating jeep by mellieg68
Aug 01, 2005 (4:36 pm)
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Hi, I have a 1995 Jeep Grand Cherokee Limited. It has been overheating for about 4-5 weeks now. It poured coolant after I gunned the engine to get up an overpass entrance. Since then I had the thermostat replaced since it seemed to be leaking around the thermostat gasket. It was still losing coolant and overheating so we replaced the water pump as there was coolant around that gasket also. It has quit losing coolant but still is overheating in stop and go traffic very quickly. I am hardly able to use my A/C without it overheating. I haven't taken it on any highway trips as I don't want to blow the engine. Any advice would be greatly appreciated. Oh as a side thought, when we replaced the water pump we had to remove the air filter system to gain enough room. In the process a small hose was dislodged and we don't know where it came from, it is still attached near the front drivers side tire well. I also had the radiator flushed this past weekend. Thank you for any help.
#91 of 561
FAN does not turn on. Saturn 95,sl2, 135,000miles by ecoss11
Aug 01, 2005 (7:51 pm)
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The cooling fan does not turn, therefore the car overheats while city driving. It has new thermostat, new coolant temperature sensor. The sensor is receiving 5.1V from the PCM. Relay is good and the fuse is good too. When turning AC on the fan still does not come on.When plugging in an Actron code reader and turning the key on. The fan starts up immediately so I think the fan motor is working. Yet the fan never turns on while driving.
#92 of 561
Re: chronic overheating jeep [mellieg68] by bolivar
Aug 01, 2005 (10:09 pm)
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Replying to: mellieg68 (Aug 01, 2005 4:36 pm)

A blown head gasket?
#93 of 561
Re: FAN does not turn on. Saturn 95,sl2, 135,000miles [ecoss11] by Mr_Shiftright HOST
Aug 02, 2005 (5:07 am)
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Replying to: ecoss11 (Aug 01, 2005 7:51 pm)

Oh if it works when you plug in a code reader that suggests to me that a sensor is not grounding its circuit properly when it should.
#94 of 561
Re: chronic overheating jeep [bolivar] by Mr_Shiftright HOST
Aug 02, 2005 (5:09 am)
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Replying to: bolivar (Aug 01, 2005 10:09 pm)

Really FAST overheats are often head gaskets or cracked heads. Of course with this old a car the radiator could be plugged up and no flushing is going to fix that---the radiator could be flow tested and a compression test or cylinder leakdown test (better yet) would reveal a head gasket issue or a crack in an exhaust port (exhaust gases heat up coolant).
#95 of 561
Problem Solved! by lemko
Aug 02, 2005 (10:26 am)
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I took my 1989 Cadillac Brougham to the shop this morning. I got a call from the technician about 20 minutes ago. He pressure-tested the cooling system and determined the problem was the heater control valve. The repair cost only $132. What a relief! I was envisioning all kinds of apocalyptic scenarios.
#96 of 561
Re: Problem Solved! [lemko] by Mr_Shiftright HOST
Aug 02, 2005 (11:49 am)
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Replying to: lemko (Aug 02, 2005 10:26 am)

phew! That's great. A pressure test is a really elegant way to find leaks.
#97 of 561
Leaky coolant problem by bishop2
Aug 02, 2005 (3:10 pm)
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I have a 1990 olds cutlass supreme with about 70K on it and I'm having a cooling system problem. I went on a long road trip, about 1200 miles, and the day after i got back I had trouble starting the car. I drove it for a while on the highway and my low coolant, temp, and service engine light came on. I pulled over and coolant started spewing out of the reservoir. I tried to get myself back home and it died on the way back home. The next day I started the car and I noticed that hot coolant was not cycling back into the radiator so I replaced the thermostat. It started cycling around again so I drove it around town and the low coolant light would turn on for a few minutes and then turn off and over again. I noticed also that at a certain point the air conditioning would stop blowing cold air and I started to smell coolant. When I got home the coolant reservoir was full and coolant was leaking from the overflow hose. I cannot see any other visible leaks from the water pump, thermostat gasket or any where else. I am constantly keeping the coolant level high enough but my low coolant light still keeps coming on. What do I do?

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