Coolant/Radiator Question
Thread Starter
Teching In
Joined: Apr 2005
Posts: 18
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From: Suburbs of Detroit
Coolant/Radiator Question 'Just had my coolant and upper and lower radiator hoses changed a week or so ago. I noticed a few days later that the radiator sounds like it is boiling after driving for a while and bringing the vehicle home. I'm guessing that the radiator cap has lost its pressure-keeping ability. There is no leaking or overflow. Anyone with a thought on this? I have a '97 Formula LT1 stock.
Thanks!
Thanks!
the LT1's have reverse cooling, so you need to make sure there's no air in the system when refilling. Whoever did the service may not know of the reverse cooling so they may have just topped up the radiator and thought it was all good.
http://www.shbox.com/1/4th_gen_tech2.html#radflush
the system needs to hold pressure, if it doesn't it can boil but you would still be > 200F and you would see that on your temp gauge. If it sounds like boiling but your temp gauge is < 200F then it's most likely air in the system.
http://www.shbox.com/1/4th_gen_tech2.html#radflush
the system needs to hold pressure, if it doesn't it can boil but you would still be > 200F and you would see that on your temp gauge. If it sounds like boiling but your temp gauge is < 200F then it's most likely air in the system.
First bleed the system of air. Then you can either test or just replace the radiator cap if the problem persists. If you didn't have this problem prior to it getting serviced, I'm guessing there is just air in your system.
Thread Starter
Teching In
Joined: Apr 2005
Posts: 18
Likes: 0
From: Suburbs of Detroit
Coolant Reply Thanks very much for quick response and insight. I'm sure that my local guy wasn't aware of the right procedure for this kind of system.
Thread Starter
Teching In
Joined: Apr 2005
Posts: 18
Likes: 0
From: Suburbs of Detroit
Reverse Cooling Fix I had no idea about reverse cooling, and I'm sure that my local guy doesn't as well. Thanks for getting back with me quickly and for the insight. (I also appreciate the link to the procedure!)
the LT1's have reverse cooling, so you need to make sure there's no air in the system when refilling. Whoever did the service may not know of the reverse cooling so they may have just topped up the radiator and thought it was all good.
http://www.shbox.com/1/4th_gen_tech2.html#radflush
the system needs to hold pressure, if it doesn't it can boil but you would still be > 200F and you would see that on your temp gauge. If it sounds like boiling but your temp gauge is < 200F then it's most likely air in the system.
http://www.shbox.com/1/4th_gen_tech2.html#radflush
the system needs to hold pressure, if it doesn't it can boil but you would still be > 200F and you would see that on your temp gauge. If it sounds like boiling but your temp gauge is < 200F then it's most likely air in the system.
Thread Starter
Teching In
Joined: Apr 2005
Posts: 18
Likes: 0
From: Suburbs of Detroit
Air in the cooling system I am sure that you are right about this. I didn't realize that this could be a problem. I will take this back to my local guy who did the job.
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'Just had my coolant and upper and lower radiator hoses changed a week or so ago. I noticed a few days later that the radiator sounds like it is boiling after driving for a while and bringing the vehicle home. I'm guessing that the radiator cap has lost its pressure-keeping ability. There is no leaking or overflow. Anyone with a thought on this? I have a '97 Formula LT1 stock.
Thanks!
Thanks!
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