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coolant level
#1332976 Fri Nov 08 2019 12:56 PM
Joined: Jul 2010
Posts: 112
S
sepp Offline OP
Shop Shark
Hello Folks
I have a 55 S2 3200 pick up. The original mileage is now 78,000.
Have spent several years restoring it and now drive it regularly.
Have noticed that it "uses coolant" when I drive 50 miles or so.
There is no leakage, no water in the oil and no overheating.
I also have a new radiator cap - 7psi. New thermostat and radiator.
I top off the radiator when I get home. It takes
about two quarts to fill it. Only fill it to about 1 quart low. Can just
barely see the coolant. Heater on or off hasn't changed things.
It starts and runs fine and the plugs don't show any residue
that would indicate water or anti freeze getting past the head gasket.
No blue smoke or excessive water vapor. I'm stumped!
Used a cooling system pressure tester and a CO2 tester. No problems found.
Up on a lift there is no water or dampness anywhere to be seen.
Does anyone have an idea or suggestion fro me as to what else I
can do to?
Many Thanks,
Sepp

Re: coolant level
sepp #1333004 Fri Nov 08 2019 05:57 PM
Joined: Jul 2014
Posts: 234
1
Shop Shark
Water expands when it gets hot, of course. So there has to be some "head space" for the expansion. Unless this truck came with an overflow tank or you installed one, filling the top reservoir to the top means some will go past the pressure cap and out the overflow tube onto the ground. Once that happens the overflow will stop. So when you look at it later to find leaks there isn't likely to be any evidence since it will have dried up when driving. Try leaving it at the level you find it when you check after fifty miles and see if you still lose coolant.

If I fill my top tank to more than my index finger can reach to the first joint it will invariably have fallen to that level next time I check it. If I leave it alone it will stay at that level. Mine has a big top tank and it takes about 2 quarts to fill it from the "index finger joint" to the top.


51 3800 PU, 55 235 (w/cam, headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.
Re: coolant level
sepp #1333010 Fri Nov 08 2019 06:14 PM
Joined: Feb 2019
Posts: 844
P
AD Addict
On my ‘52 with a ‘59 235 if you peek into the radiator, you can’t see the level. I filled it a couple of times with the same result. It doesn’t overheat so I assume it’s OK. This bothers me so I’m going to keep my eye out for an overflow tank.


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: coolant level
sepp #1333040 Fri Nov 08 2019 10:19 PM
Joined: Jun 2011
Posts: 3,632
E
Shop Shark
Chrysler makes a clear vertical overflow tank the takes up very little room, mounts in tapered bracket which I copied to mount, comes on some pickups, some cars.

Ed

Attached Files
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Last edited by EdPruss; Fri Nov 08 2019 10:20 PM.

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Re: coolant level
sepp #1333049 Sat Nov 09 2019 12:11 AM
Joined: Aug 2012
Posts: 1,742
V
Shop Shark
This after market overflow tube works great, isn't expensive and adds a little bling to the engine bay.
Stainless Overflow tube

I highly recommend utilizing an overflow resevoir of any type, be it OEM, custom, a coke bottle ,even a coffee can, bag etc.

Re: coolant level
sepp #1333052 Sat Nov 09 2019 12:17 AM
Joined: Jul 2008
Posts: 1,353
H
Shop Shark
"This after market overflow tube works great, isn't expensive and adds a little bling to the engine bay."
Who sells this and how much?
Harold


Harold
Is a restoration ever finished?
Re: coolant level
sepp #1333053 Sat Nov 09 2019 12:24 AM
Joined: Aug 2012
Posts: 1,742
V
Shop Shark
Many aftermarket providers carry them, I got mine here: Stainless overflow tube
Dave

Re: coolant level
sepp #1333058 Sat Nov 09 2019 01:25 AM
Joined: Jul 2000
Posts: 1,041
G
Shop Clutterist
I used the skinnier overflow tube: Stainless overflow

I don't like antifreeze dripping onto the garage floor where the cat might lap it up.


Gord
----
1954 1/2 ton 235 4 speed
Re: coolant level
sepp #1333162 Sun Nov 10 2019 12:28 AM
Joined: Mar 2010
Posts: 9,446
5
Master Gabster
With a cold engine, the coolant level only needs to be at a level high enough to cover the tubes.
I recommend that you remove the radiator cap while the engine is cold. Start with the coolant level no more than 1 inch above the tubes, then run the engine in the driveway until it fully warmed up. You should see the coolant noticeably rise once the engine reaches operating temperature.
Put the cap back on and drive the truck like there is nothing wrong with it.
With all of the tests which you have done so far, I don't think that there is.
Carl


Moderated by  Woogeroo 

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