After replacing the hoses from my heater core to my stat and intake. I am leaking antifreeze into the passenger side of the interior, just under the dash?? In your opinion, what woud cause this??? thanks in advance!!!!!!!

 

You need to replace the heater core. I have heard a lot of people say it is a pain, that they have to remove the dash, all I had to do was remove a black panel though.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
UNDERDRIVE PULLEY
ACCEL HEI DISTRIBUTOR
2:73 GEARS

 

I second Mark. I had the same problem and my heater core had busted.

Jason

 

 

Remove the hoses from the heater core... if the old ones were hard to remove, then you might have some of the old hose material still on the nipple (or whatever you would call it), and you just can't see it. I had the same problem a couple months ago, thought it was one of the freeze plugs on the back of the block. Thank God I checked the connections on the hoses first and found a chunk stuck to the inside of the hose preventing a tight seal no matter how tight the clamps were. Just a thought......

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Kevin Irving
85 Trans Am WS-6, 305 TPI, custom burned '86 PROM with '87 "165"ECM, Accel Supercoil & 8.8 Wires, MSD 6AL, Aluminum Driveshaft, Wonderbar, TB Coolant Bypass, Ported Plenum, Modified MAF, Syclone Fuel Pump, JET Airfoil

15.556 @ 86.65mph, Nov 10, 2000.... I know it sucks.. but it will get better!

http://www.geocities.com/transam85tpi/

Member - The Tidewater Trans Am Club, Norfolk VA http://www.geocities.com/ttacva/

 

He said 'nipple' ehehehhe

Just kiddin....

Possibly the core was pretty corroded and if you didn't use a razor to cut the old hose off and resorted to manhandling it off, you may have cracked the 'nipple' where it enters the core.

They are a pia!

 

My heater core did the same thing. Worked fine, I swapped the V6 to a V8 and the heater core leaked into the car. I later found the the heater core had cracked. Probably from the stress of taking the old hoses off.

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1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP

 

Well you guy were right.. The core was busted. Why GM would put screws way up there is beyond me though Oh well problem fixed..Thanks a lot guys!!!!!

 

Oh and thanks Again!!!!!!!
Thank you!!!!!