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Leaking Heater Core ! G20 Van Need Help !

10-02-2007, 10:06 AM
My 1988 G20 Van with 305 V8 is leaking from the heater into the passenger side carpet ! Whatta Mess :shakehead ... I got a new heater core ...I got 3 sevice manuals ! A Chevy shop manual , hanes manual and Chilton too All of the manuals I think are POOR on this :frown: ... I got both heater hoses off out front and the whole dash I got loose and propped up over the heater the steering I got loose too... I also got the heater case the 3 outside nuts and the inside screw out ...NOW what do I do ? It won't budge ? :banghead:
I can wiggle the right side of the heater case but the left seems to be stuck ! Do I need to remove MORE stuff ? to get the heater case out ? Anyone done this ? who can advise me ?

I installed a new engine in this thing recently I think installing the engine was easier than replacing the heater core ...


10-05-2007, 10:54 PM
I cant help you bob but dont give up. Its something simple that is holding you up. Just look everything over really good and it will come to you. Chris

10-06-2007, 01:37 PM
I cant help you bob but dont give up. Its something simple that is holding you up. Just look everything over really good and it will come to you. Chris

Thanks Chris I appreciate the support ... I worked on it another day and could not get it out SO ...I patched it back together so I could drive it and took it to a shop where they could do the job for me ...They worked on it two days and got it done fine ...Charged me 337 dollars and I PROVIDED THE PARTS ...When I picked up the van I was told ..."This thing was a nightmare ! " so I felt better about it ... Thanks Again Chris ! :) BOB

10-06-2007, 08:40 PM
$337, thats insane but im happy to hear ya got her fixed.

11-13-2007, 09:35 PM
Hello.. Wow Bob $337.. My g20 just started to leak on the passenger side floor.. I don't have much time before it gets too cold.. I will try some barrs stop leak since its a dribble leak but seems to get worse as the miles get put on.. Is barrs leak recommended or should I replace the HC.


11-16-2007, 01:51 AM
Id replace it and only use stop leak in an emergency situation.

01-28-2008, 08:43 PM
wow i did mine by myself in my g30 but i fixed some things while i was there and put new speakers in the dash to...i took my time and took it apart on a weekend and put it back to gether the next...i have another van to work out of though when one is down...heater core was 35.00 at auto zone..and they have repair books on line if you need it you can also look up your part to find out how much and if it's in stock i did my g20 in the lucky that time...i hate working in the i need to do my astro..dam it i am never done....

07-19-2009, 11:03 AM
open the hoed, there is screws to removed from the fire wall in the engine area.

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07-20-2009, 03:52 PM
yes its old...but people will search to find the answer....doesn't matter how old....:) thanks for the welcome
and good luck for every one trying to replace heater core......defiantly its a do it yourself hundreds$$$ in labor at the shop

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