My car is over heating and it is blocked at the heater core.

Tiny
PLEASEHELP!!
  • MEMBER
  • 1997 PONTIAC SUNFIRE
  • 245,000 MILES
We know this because we have done everything else to the heating system. All that is left is the heater core so we need to change it out and I need to know how to do this? I now that it is a really big and hard job but it has to be done, so with a little help from you guys maybe we can get the job done. We have tried running CLR though it and for awhile that was working but I think that there is just to much build-up in the heater-core now and it is 100 percent blocked. We also tried flushing it out a few times and that did not work either. So know we come to you guys and hope that we can get this problem fixed.
Saturday, October 22nd, 2011 AT 6:54 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Dunno what you've checked-did you try the thermostat for a start?
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Thursday, October 27th, 2011 AT 7:38 PM
Tiny
ASHLEYADAM
  • MEMBER
  • 6 POSTS
Not sure what your fist problem was but if you drained coolant, then replaced, you would need to vent the system to get trapped air out. If you don't do this the vehicle will continually overheat as fluid is not circulating properly to cool the engine.
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Tuesday, February 21st, 2012 AT 4:58 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do yourself a favor if you wanna help answer the open new question from here on out-I can clean my mess
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Tuesday, February 21st, 2012 AT 5:07 AM

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