This is a discussion on heating issue within the General Help forums, part of the LSx Technical Help Section category; Friend you have one of two things going on. 1. You have a head gasket leak that is pressurizing the ...
03-13-2011, 05:18 PM #21
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- Aug 2005
- Texas Department of Corrections
- Retired Outlaw Sum Bitch
Friend you have one of two things going on.
1. You have a head gasket leak that is pressurizing the system.
2. You have a trapped air bubble in the system.
Both of the above are referred to as "Back Flow Pressure" as it will cause coolant to come out the overflow tank.
Sounds to me like you have a air bubble bubba.
03-23-2011, 06:34 PM #22
I saw yesterday my fans aren't coming on... Turned on the ac and everything worked... Tomorrow I am changing the coolant temperature sensor and the thermostat keep u posted sorry about the delay
03-24-2011, 08:37 AM #23
So replaced the coolant sensor, thermostat did a coolant flush, burped the system... The fans are still not coming on.. I checked the fuses and the relays... They only come on when the ac is on... Please help
03-24-2011, 08:32 PM #24
is the car temperature still getting hot after you replace the sensor and Tstat? or is the gauge staying in the normal range?
03-25-2011, 04:18 AM #25
03-25-2011, 04:38 PM #26
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- Apr 2008
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1999 Formula WS6 M6-sold
- 2001 Silverado Z71
If they come on with the AC, there's a good chance they are working properly. Remember, the Low speed comes on at 226 degrees, high speed comes on at 234 degrees. That's pretty warm. There are a lot of people who think their fans don't work, because they don't come on at operating temps much.
If you know for sure your coolant temp is above 226 or 234 and still the fans don't kick on, then there is problem.
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