Heater core bypass
Thread Starter
Drifting
Joined: Jan 2010
Posts: 1,447
Likes: 1
From: Katy TX
Heater core bypass
Was out picking up a part for my wife's car yesterday afternoon and once I arrived home and was pulling into the garage, smoke started coming in from all the vents. I realized it could have been 1 of 3 issues, 1) heater core 2) plugged A/C drain or 3) evaporator. I quickly checked the passenger side floorboard and a puddle of water. 
. HEATER CORE!
I didn't have time to take it to the dealer to have heater core replaced, so I bypassed the heater core and the car has been running fine. Couple things is noticed is that the car warms about 10 degree warmer. Why is that?
. HEATER CORE! I didn't have time to take it to the dealer to have heater core replaced, so I bypassed the heater core and the car has been running fine. Couple things is noticed is that the car warms about 10 degree warmer. Why is that?
Le Mans Master
Joined: Jul 2010
Posts: 5,986
Likes: 719
Was out picking up a part for my wife's car yesterday afternoon and once I arrived home and was pulling into the garage, smoke started coming in from all the vents. I realized it could have been 1 of 3 issues, 1) heater core 2) plugged A/C drain or 3) evaporator. I quickly checked the passenger side floorboard and a puddle of water. . HEATER CORE!
I didn't have time to take it to the dealer to have heater core replaced, so I bypassed the heater core and the car has been running fine. Couple things is noticed is that the car warms about 10 degree warmer. Why is that?
. HEATER CORE! I didn't have time to take it to the dealer to have heater core replaced, so I bypassed the heater core and the car has been running fine. Couple things is noticed is that the car warms about 10 degree warmer. Why is that?
Thread Starter
Drifting
Joined: Jan 2010
Posts: 1,447
Likes: 1
From: Katy TX
Isn't coolant only circulated through the Heater core when the heater is on?
Last edited by All_Motor_C5LS6; Oct 17, 2011 at 03:19 PM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Coolant flows thru the heater core ALL THE TIME. When you do not have heat selected, small doors close off air flow so no air flows thru the heater core. If you NOT using the heater,, there should NOT be a significant change in the way the cooling system acts or the amount of time that it takes for the car to warm up.
If your using the heater,, it does add some heat extraction to the cooling system.
If your using the heater,, it does add some heat extraction to the cooling system.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Coolant flows thru the heater core ALL THE TIME. When you do not have heat selected, small doors close off air flow so no air flows thru the heater core. If you NOT using the heater,, there should NOT be a significant change in the way the cooling system acts or the amount of time that it takes for the car to warm up.
If your using the heater,, it does add some heat extraction to the cooling system.
If your using the heater,, it does add some heat extraction to the cooling system.
Last edited by dougbfresh; Oct 17, 2011 at 06:51 PM.
Thread Starter
Drifting
Joined: Jan 2010
Posts: 1,447
Likes: 1
From: Katy TX
Coolant flows thru the heater core ALL THE TIME. When you do not have heat selected, small doors close off air flow so no air flows thru the heater core. If you NOT using the heater,, there should NOT be a significant change in the way the cooling system acts or the amount of time that it takes for the car to warm up.
If your using the heater,, it does add some heat extraction to the cooling system.
If your using the heater,, it does add some heat extraction to the cooling system.
