Engine overheats

Tiny
XJSHEN
  • MEMBER
  • 2003 PONTIAC MONTANA
  • 71,000 MILES
Pressure inside of radiator abnormally higher than usual and coolant flow out from radiator mouth continuously when open the radiator cap. What is cause of the problem? How to remove those air inside cooling system? I tried normal air bleeding from left and right side, but it does not help to remove the air and reduce the inside pressure. I think that may be caused by intake manifold gasket problem.
Thanks for your instruction and comment.
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Saturday, June 24th, 2017 AT 4:42 PM

8 Replies

Tiny
MHPAUTOS
  • EXPERT
Can be a number of reasons. It can be a coolant leak into the cylinder and this can be checked with a head check, which is a simple chemical test to see if exhaust gasses are in the cooling system. Most work shops can do this simple test quickly. Other reasons can be a faulty thermostat a blocked radiator or a faulty water pump. If you get the radiator checked, have it removed and core cleaned, as a back flush will not do the job here. It may have a number of blocked core tubes restricting coolant circulation.
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Saturday, June 24th, 2017 AT 6:23 PM
Tiny
XJSHEN
  • MEMBER
Thanks a lot for your help!
Actually, I worked with conventional air removing method that was not effective to remove the air in the radiator and reduce the pressure in the radiator.
How to remove the air in the radiator? Is normal air removing method effective?
Thanks for your comment and instruction!
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Tuesday, June 27th, 2017 AT 1:10 PM
Tiny
MHPAUTOS
  • EXPERT
Run with cap off air should make its way to the top, if you can have the front of the car slightly elevated as this can help
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Tuesday, June 27th, 2017 AT 7:19 PM
Tiny
XJSHEN
  • MEMBER
Thanks! I did it but does not work!
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Monday, July 3rd, 2017 AT 4:46 PM
Tiny
KEN
  • ADMIN
Hello and welcome to the site

It sounds like you have a blown head gasket, here is a test to help confirm the problem.

https://www.2carpros.com/articles/head-gasket-blown-test

Please run this test and get back to us we are interested to see what it is.

Cheers, Ken
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Wednesday, July 5th, 2017 AT 1:50 PM
Tiny
XJSHEN
  • MEMBER
Thanks a lot Ken!
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Thursday, July 20th, 2017 AT 1:51 PM
Tiny
XJSHEN
  • MEMBER
Problem was solved by replacement of coolant sensor and fan relays.
Thanks for many helps every one.
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Friday, September 1st, 2017 AT 7:59 AM
Tiny
KEN
  • ADMIN
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Friday, September 1st, 2017 AT 11:44 AM

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