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Install Overflow Tank #760537
May 09th 2020 2:54 pm
May 09th 2020 2:54 pm
Joined: May 2020
Posts: 35
Bozeman, MT
J
jtozier406 Offline OP
newbie
jtozier406  Offline OP
newbie
J
Joined: May 2020
Posts: 35
Bozeman, MT
My 77' G20 does not have an overflow tank. I am trying to find one that I can mount up and I have a few questions. I do have a pressurized radiator cap and currently a hose that is coiled up. I am thinking this is leaking coolant under certain conditions. I need to add this tank to see if this stops my coolant leaks.

Do I get an expansion or an overflow tank?

Anyone know one that will mount up in a G20 easily?

Does it need to be mounted in line with the radiator overflow hose? Or should it be above, below?

Some tanks have the hose coming in from the bottom and some at the top? I guess I am confused if this will just end up filling with coolant or if the coolant will flow back into the radiator.


1977 Chevy G20 with 350
Re: Install Overflow Tank [Re: jtozier406] #760538
May 09th 2020 3:11 pm
May 09th 2020 3:11 pm
Joined: Jun 2010
Posts: 14,838
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 14,838
Van Diego California
It comes in the bottom as the van get warm coolant goes in to this overflow tank..... as the van cools it goes back into the rad. Go to any junk yard that has a chevy van g10 20 30 they are all the same...

[Linked Image]


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Install Overflow Tank [Re: jtozier406] #760539
May 09th 2020 3:28 pm
May 09th 2020 3:28 pm
Joined: May 2020
Posts: 35
Bozeman, MT
J
jtozier406 Offline OP
newbie
jtozier406  Offline OP
newbie
J
Joined: May 2020
Posts: 35
Bozeman, MT
Thank you sir!


1977 Chevy G20 with 350
Re: Install Overflow Tank [Re: jtozier406] #761157
May 20th 2020 10:10 am
May 20th 2020 10:10 am
Joined: May 2020
Posts: 35
Bozeman, MT
J
jtozier406 Offline OP
newbie
jtozier406  Offline OP
newbie
J
Joined: May 2020
Posts: 35
Bozeman, MT
I was able to find the correct one at our local salvage yard. The pressure washer cleaned it up nice.

Attached Files 20200520_080455.jpg
Last edited by jtozier406; May 20th 2020 10:11 am.

1977 Chevy G20 with 350
Re: Install Overflow Tank [Re: jtozier406] #761162
May 20th 2020 11:43 am
May 20th 2020 11:43 am
Joined: Jun 2010
Posts: 14,838
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 14,838
Van Diego California
SWEET !


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB

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