Radiator Curculation problems
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Elder User
Joined: Jan 2005
Posts: 656
Likes: 1
From: Houston
Radiator Curculation problems
I have gained the title Senor Member, because I own a Bronco. But today I need some help with a friends 99 Malabue. Please forgive her for owning a GMC.
Here is the problem:
She developed a leak. it was the small hose that runs through her Throttle Body. It had a hole that looked like it grew pressure and popped. I fixed it. I drained most her water. I put just water back in to test. I started the car and let it get hot. Her temp gauge showed overheating, but the engine was not hot to the touch. Her Heater on the inside would not work but was working before I fixed the hose. The heater hose really dont feel like water is curculating through them, I then put a new Thermostat in thinking it was stuck shut. Still the same problem. The car has a bleeder valve on top of the water pump, I opened it and nothing but steam is comming out. What do you guys think the problem is?
Thank you
Here is the problem:
She developed a leak. it was the small hose that runs through her Throttle Body. It had a hole that looked like it grew pressure and popped. I fixed it. I drained most her water. I put just water back in to test. I started the car and let it get hot. Her temp gauge showed overheating, but the engine was not hot to the touch. Her Heater on the inside would not work but was working before I fixed the hose. The heater hose really dont feel like water is curculating through them, I then put a new Thermostat in thinking it was stuck shut. Still the same problem. The car has a bleeder valve on top of the water pump, I opened it and nothing but steam is comming out. What do you guys think the problem is?
Thank you
Thread Starter
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Elder User
Joined: Jan 2005
Posts: 656
Likes: 1
From: Houston
Thanks Bill, after doing a search on "heater" it seems 9 times out of 10 if some one replaced someting on their cooling system and drained the water it always seems to be Air pockets. This car will really be prone to this problem. both radiator hoses are on the bottom. It has no cap only a resevor. What would be the best way to purge such a car?
Post Fiend
Joined: Feb 2003
Posts: 6,940
Likes: 2
From: Eastern WA
Not sure on this exact model; I've never seen a radiator with both hoses on the bottom or the top. For good cooling, usually one is on the top and the other on the bottom. I'm a bit confused on the no cap; I don't see how the cooling system would pressurize without one. I have a Regal with a point on the engine above the radiator; that car is a PITA to purge. I fill the radiator with the bleed valve open, warm it up a bit and carefully watch the temp, add fluid, repeat until the t-stat opens. I then fill the radiator as best as I can and cap it. Next I squeeze a radiator hose to drive air out through the bleeder. Close the bleeder and release the hose; it draws coolant in form the burp tank. Repeat repeat repeat until there is no more air. I then warm it up, watch the temp so it doesn't overheat, and shut it down. I let it sit a few minutes, then crack the bleeder to remove more air. I do this a few times for good measure. What a hassle, but I don't want to overheat an engine. You might look on autozone.com in ther repair manuals online to see if they have the proceedure.
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