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78 G20 Alive Again. #723711
May 16th 2017 2:45 pm
May 16th 2017 2:45 pm
Joined: May 2015
Posts: 7
W PA
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Billygoat Offline OP
stranger
Billygoat  Offline OP
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Joined: May 2015
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W PA
My 78 G20 blew a head gasket last year. It was sucking coolant into one of the cylinders and white smoke was pouring out the tailpipe. I had built a 1995 350 roller motor and installed it 12 years ago. It looked too tight to do the head gaskets in the van so I pulled the motor. Didn’t want to disconnect all the A/C so I dropped it out the hole (the same way I did it 12 years ago). Tight fit but easily done. Used stainless steel head gaskets this time and also replaced all the engine gaskets along with new hoses/belts. The piston that is bright is the cylinder that was sucking coolant. Runs like new again. I had purchased this van new in 78 when I was 21. Has every option except rear A/C. Almost didn’t buy it because it cost so much, $7700. Couldn't be without my van this summer.

Attached Files Van1.jpgVan2.jpgVan4.jpgVan5.1.jpgVan92.2.jpgVan93.jpgVan94.jpgVan95.jpg1 Passenger Side.jpg6 Inside.jpg
Last edited by Billygoat; May 16th 2017 2:52 pm.
Re: 78 G20 Alive Again. [Re: Billygoat] #723713
May 16th 2017 4:30 pm
May 16th 2017 4:30 pm
Joined: Jul 2014
Posts: 948
Texas, under the A/C
Rusty_Pancelode Offline
old hand
Rusty_Pancelode  Offline
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Joined: Jul 2014
Posts: 948
Texas, under the A/C
Beautiful van.
You dropped the engine out the bottom?


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Re: 78 G20 Alive Again. [Re: Billygoat] #723718
May 16th 2017 7:47 pm
May 16th 2017 7:47 pm
Joined: May 2015
Posts: 7
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Billygoat Offline OP
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Billygoat  Offline OP
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Joined: May 2015
Posts: 7
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Yep, dropped it out the bottom. Took out the passenger seat, put the cherry picker through the door, picked it up a couple inches off the motor mounts, moved it forward slightly, tilted the engine back about 45 degrees and dropped it through the hole. That way I didn't have to take apart the front end and break the A/C apart. I just had it converted to 134a last August. The head gasket let go on Labor Day weekend coming home from a trip. Had been parked since then. Started on Easter Sunday and finished in 3 weeks. Took about 8 hrs to get it out. Twice that long to get it back in and everything hooked up. Could only work a couple hours in the evenings after work and on weekends. Had done this before 12 yrs ago so knew exactly what to do. Not a big deal (if you have the tools).

Re: 78 G20 Alive Again. [Re: Billygoat] #723721
May 16th 2017 10:59 pm
May 16th 2017 10:59 pm
Joined: Apr 2017
Posts: 143
Warrington, Pa
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Greenstreak Offline
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Greenstreak  Offline
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Joined: Apr 2017
Posts: 143
Warrington, Pa
Wow, really steam cleaned that one piston.

Re: 78 G20 Alive Again. [Re: Billygoat] #723722
May 16th 2017 11:14 pm
May 16th 2017 11:14 pm
Joined: Jul 2014
Posts: 948
Texas, under the A/C
Rusty_Pancelode Offline
old hand
Rusty_Pancelode  Offline
old hand
Joined: Jul 2014
Posts: 948
Texas, under the A/C
Cool. I don't think I would have ever thought of that, but I always wanted a solution for pulling the engine that doesn't involve pulling my van's face off. smile


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