Heater core bypass.
Thread Starter
Racer
Joined: Apr 2007
Posts: 291
Likes: 0
From: Lakewood CA
Heater core bypass.
My heater core is leaking and I am way too lazy to fix it. Besides, I almost never need to turn it on since I am in California. 
Anyways, I see how all the cooling lines for the heater system are routed but I was wondering what would be the best way to bypass it? Seems to me like capping off the water pump and cooling system tank thing would be OK, but I need some expert advice.
Anyways, I see how all the cooling lines for the heater system are routed but I was wondering what would be the best way to bypass it? Seems to me like capping off the water pump and cooling system tank thing would be OK, but I need some expert advice.
Pro
Joined: May 2006
Posts: 702
Likes: 6
From: North Vancouver BC
My heater core is leaking and I am way too lazy to fix it. Besides, I almost never need to turn it on since I am in California.
Anyways, I see how all the cooling lines for the heater system are routed but I was wondering what would be the best way to bypass it? Seems to me like capping off the water pump and cooling system tank thing would be OK, but I need some expert advice.
Anyways, I see how all the cooling lines for the heater system are routed but I was wondering what would be the best way to bypass it? Seems to me like capping off the water pump and cooling system tank thing would be OK, but I need some expert advice.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Thread Starter
Racer
Joined: Apr 2007
Posts: 291
Likes: 0
From: Lakewood CA
'93.
Would you mind giving me some advice? I'm pretty sure I just need to cap off the surge tank and water pump.
Would you mind giving me some advice? I'm pretty sure I just need to cap off the surge tank and water pump.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
While rather time consuming, the heater core replacement on C4s is not quite as bad as it is made out to be sometimes. With a manual, a little patience and an adequate supply of (most importantly) beer, most anyone should be able to tackle it.
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
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Thread Starter
Racer
Joined: Apr 2007
Posts: 291
Likes: 0
From: Lakewood CA
Like Corvette Kid said, Do NOT by-pass the surge tank!!!! Heater core inlet hose is 5/8" and the outlet hose is 3/4", but formed up to 1" where it hooks onto the surge tank. You can by-pass the heater core ONLY and will have to make an adapter due to the different sizes.
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
Thread Starter
Racer
Joined: Apr 2007
Posts: 291
Likes: 0
From: Lakewood CA
Well, my first (and probably the best idea) didn't work out since nobody carried it. I was just looking for a simple barb fitting that had 3/4" on one side and 5/8" on the other. Ace and Lowes didn't have it, so I had to use individual barb fittings with a coupling in the middle. It isn't pretty but it sure does the job! I bypassed the throttle body coolant lines while I was in there too.
Burning Brakes
Joined: Aug 2003
Posts: 899
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From: Copperas Cove TX
My 86 started leaking.....I went to my local Autozone and went back to where they had all the custom heater hoses hanging up and found a "U" shaped molded hose that had 5/8" on one side and 3/4" on the other.......Cut the two small hoses off that come out of the heater core on the outside of the firewall and inserted the "U" between the two pipes that run into the heater.........Been like that for two years.....Got a new core, someday when I really feel like I want my butt kicked I might put it in........
Have a Great Day!!!!!!!!
Have a Great Day!!!!!!!!
