| 36ford pick-up | -- 05-09-2012 @ 7:19 AM |
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My 36 ford pick-up has a 5 blade fan and has never over heated until last weekend. I drove it about 35 miles up the Mtn.and it pulled it at 35 mph. in high gear,BUT at the top of the MTN. it pushed out about 3 pts. of coolant 50/50. On the way back -same thing. When I got home it took 3 gts. of 50/50. It does have 4:11 gears which I would like to change. IS OVER HEATING NORMAL? Karl
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| 51f1 | -- 05-11-2012 @ 10:57 AM |
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Could have busted the head gasket. Richard
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| Stroker | -- 05-11-2012 @ 3:50 PM |
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Climbing up steep grades with older vehicles can cause overheating, because they lack auxiliary fans and high pressure cooling systems. It's not unusual to have a 30's vintage car overheat under these conditions regardless of make.You don't say how high or steep the "mountain" is, but I have had many similar experiences going up several thousand feet on a warm day in flathead powered trucks and cars. Losing coolant going down, however indicates a serious problem. If you don't have a serious leak at the water pumps, I'd tend to favor 51f1's head gasket suggestion. Overheating going downhill is NOT normal. A long climb can overheat any similar vintage engine Running uphill in high gear at 35 even with 4:11's is also in my opinion, lugging the motor, which can contribute to blowing a head gasket; since the high temperatures coupled with low rpms, can initiate detonation, which may result in a significant pressure spike in the combustion chambers, thereby potentially leading to gasket failure.
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| supereal | -- 05-11-2012 @ 4:16 PM |
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I suspect a change in altitude, coupled with a radiator that is marginal. A lime coating no thicker than a coat of paint can reduce cooling efficiency 40% or more. You may wish to investigate Skip Haney's overflow valve which provides some of the benefits of a pressure system. Each pound of pressure increases the boiling point by about three degrees. Pressure caps, back in the day, were in the 3-7 pound range. My pickup ('06) has a 17 pound cap! Unless you have the classic signs of a blown head gasket or other serious problem, I'd fill it back up and drive it. The next time you go mountain climbing, try running plain water.
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| 36ford pick-up | -- 05-14-2012 @ 7:58 AM |
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OK Since the drive to the other side of the mountain and back I added the 3 qts. of water and a pt of Water Weter, which is supposed to make it run 20* cooler. Did a compression test and all cyln.@90 lbs. and went on a 30 mile road test at normal temp. I think I will install an overflow and carry extra water if I go over the Laural Mountains. Thank-you Karl
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| supereal | -- 05-14-2012 @ 12:55 PM |
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I've never used "water wetter" such as Purple Ice, but some say it helps. It is a solution to reduce surface tension and produce better contact with the water jacket. If it does help significantly, I suspect either, or both, your radiator or engine water jacket is limed up. The use of antifreeze drops cooling efficiency mesurably, and in a limed engine, will produce coolant loss as heat causes expansion of the coolant enough to force it out of the overflow. Be sure to use "demineralized" water.
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| 36ford pick-up | -- 06-06-2012 @ 1:04 PM |
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Problem solved; I flushed the engine and it was not dirty,and ordered 2 new water pumps from Fryer`s .BINGO. With 5 1/2 new galons of 50/50 and new pumps temp. droped from 190* to 160* and Sweet Pea went back up that mtn. and was 160* at the top totaling 65 mile without a problem. Happy now.
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