Coolant loss after driving a couple hours.

[67428GT500]

Do most find it common to loose a quart of fluid after driving a couple hours in warm temperatures. There is no loss into the oil, nor so I see anything obvious.
                                                               -Keith

[plovett]

I have never noticed a coolant loss like that.  It is a closed system even on older cars, unless the pressure has built up to the point where it is vented.  Check/change radiator cap?

[My427stang]

I would have the system and the cap pressure tested. Now if you are overfilling it will push out with expansion, but it will stop. For reference though, I haven’t added any in my Mustang since the EFI install in 2009/2010

[machoneman]

Yes, you didn't say it had stopped after pushing out what could have been excess coolant.

[Falcon67]

Same - if you have a 16 or 22 lb cap, system is tight and you have a coolant recovery tank, there should be no loss. 

[67428GT500]

It's a '67 500. Just a overflow tube. No recovery tank. If the loss was into a cylinder it would show up in the oil.  The cap is a new 13LB  Autolite reproduction. I also noticed that even after being gone three weeks and coming back and taking the radiator cap off It had pressure in the radiator.  Has anyone had an intake gasket leak into an end intake port and just burn it off?
                                                              -Keith

[fryedaddy]

if it coming out a overflow hose,if it had a overflow tank it may suck it back in instead of out on the ground out the hose.

[67428GT500]

I won't put an overflow tank on a Shelby. No way to hide it. I don't see signs of overflow from the tube, but I am just running distilled water and water wetter.  I think because of the way it evaporates it's harder to detect. There are no puddles of overflow when I park it either.
                                                                                                                 -Keith

[Falcon67]

Well, that's where it's likely going - out the overflow tube.  Let it work it's self out and then monitor.  If there is no further loss and no cooling issues, then it's just the way it is.  IIRC, before recovery tanks you'd run a good 1/2" plus below the filler neck after several heat cycles.  If it hold pressure, then it's just doing what it does.  I personally would put a smaller non-descript removable tank on it, easy to remove for shows.  If you ever put it on a track and they look at it, you'll be waved off without a recovery tank.  Hard and fast rule everywhere.

[cjshaker]

I personally would put a smaller non-descript removable tank on it, easy to remove for shows.  If you ever put it on a track and they look at it, you'll be waved off without a recovery tank.  Hard and fast rule everywhere.

Ditto, even a small 20oz plastic pop bottle zip tied beside the radiator works. One snip and it's easily removed. At least that'll give you an answer if that's where it's going.

[fryedaddy]

a water bottle is all i use,and it sits on the front frame rail.i could take it off in 10 sec if you are worried about someone seeing it on your shelby.i can see your point.is it 100% original?

[machoneman]

I personally would put a smaller non-descript removable tank on it, easy to remove for shows.  If you ever put it on a track and they look at it, you'll be waved off without a recovery tank.  Hard and fast rule everywhere.

Ditto, even a small 20oz plastic pop bottle zip tied beside the radiator works. One snip and it's easily removed. At least that'll give you an answer if that's where it's going.

The coolest catch can of all time, in the 70's at least (!) was a Coors beer can. We here in the Midwest then could rarely even get a Coors unless one travled to CO or CA.

[67428GT500]

I saw a rat rod with an old Coca Cola bottle in Grapevine Tx last week.  I will try and find something I can hide under the battery tray.  Yes, It is a Real Shelby. Uh, kind of stock.. I will try and post a couple pictures here.

[fryedaddy]

great looking car,my favorite one

[67428GT500]

Thank you. I did everything but the exterior paint.

                                                    -Keith