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Old 06-20-2021, 03:16 PM   #1
Jeff Stout
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Default Coolant recovery on 68 Cutlass

Current set up is 16 lb. cap with the overflow hose going onto ground. With 116 degree outside I'm running 235 and when shut off it will spit out a little. I'm wanting to run a recovery tank but trying find proper radiator cap to let water from tank suck back in. I believe my current cap is 1 way? I think. assuming tank needs hose coming from bottom to always be submerged into water and allow suction back into radiator when cooled.

Last edited by Jeff Stout; 06-20-2021 at 03:17 PM. Reason: More
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Old 06-28-2021, 06:44 PM   #2
jimmyparker
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Default Re: Coolant recovery on 68 Cutlass

Jeff, I'm not an expert but I see no one else has responded so I'll give it a shot. First, 235 degrees is pretty hot for an older car and sometimes I would find issues with timing or advance in the distributor especially on Buicks and Oldsmobiles that would effect the running temp. I'm pretty sure we bought recovery kits back in the day which consisted of a recovery tank, hoses, and I think a cap and they may have came from NAPA. The tank was pretty large, at least a quart maybe a little more
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Old 06-28-2021, 11:03 PM   #3
Jeff Stout
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Default Re: Coolant recovery on 68 Cutlass

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Originally Posted by jimmyparker View Post
Jeff, I'm not an expert but I see no one else has responded so I'll give it a shot. First, 235 degrees is pretty hot for an older car and sometimes I would find issues with timing or advance in the distributor especially on Buicks and Oldsmobiles that would effect the running temp. I'm pretty sure we bought recovery kits back in the day which consisted of a recovery tank, hoses, and I think a cap and they may have came from NAPA. The tank was pretty large, at least a quart maybe a little more
You are correct. 72 Olds has a recovery system like you described and looks original to the car. I have only been 235 a couple times. With some fluid loss after being shut off. I'm usually 220 with 110 plus outside air and no fluid loss. Just want to be able to stop checking every week and adding some fluid. Would rather capture and send back.
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Old 07-20-2021, 10:13 AM   #4
1legjerry
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Default Re: Coolant recovery on 68 Cutlass

16lb stant #10231 or 10230 radiator cap

Cheap rcovery tank
https://www.autozone.com/heating-and...87_0?rrec=true

Amazon
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Old 07-20-2021, 07:03 PM   #5
Mark Ugrich
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Default Re: Coolant recovery on 68 Cutlass

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Originally Posted by 1legjerry View Post
16lb stant #10231 or 10230 radiator cap

Cheap rcovery tank
https://www.autozone.com/heating-and...87_0?rrec=true

Amazon
This^^^^^^^^. Only thing I can add is make sure the recovery tank transfer tube is open. I’ve seen some tanks that have the opening molded shut. You’ll wonder why your upper radiator hose is sucked together.
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Old 07-29-2021, 09:21 AM   #6
John Kissel
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Default Re: Coolant recovery on 68 Cutlass

Go to Year One, and look at # S103,it ain't that much, and look like it should work.
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Old 07-29-2021, 10:48 AM   #7
Jeff Stout
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Default Re: Coolant recovery on 68 Cutlass

Thanks everyone. I just sold car today. Heading to Netherland. I was surprised.
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