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Joined: Jan 2002
Posts: 108
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jan 2002
Posts: 108 |
Hello!
A lovely season for chevys is soon too be over. My Chevrolet 1931 has worked very well, with the measures I have done during the years for example 18 degree preignition,5/64" spark plug gap,3/64" breaker arm gap,and also a pressure tank for the cooling system. I drove for 20 miles in 80-90 degree F in sun and the car stayed cold at the white field before the red field.
The pressure tank to the cooling system comes from a Volvo 141 and is connected to the drain pipe of the radiator. I have put double gasket in the radiator cap to keep it tight.
What I wonder now is it my engine can be damaged by the overpressure I have made.
Bengt From SWeden
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
Hi, One problem you may encounter is leaking around the water pump packing. If the cooling system pressure is increased it would find the weakest link in the system. That location is the water pump. I don't know where your overflo tank is located, but it should be the highest (with reference to the engine) place you can find to mount it. This would allow any overflo a chance to return to the system. If high enough you would not have to pressurize the cooling system.  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Jan 2002
Posts: 108
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jan 2002
Posts: 108 |
Hello and thanks for answer.
You are right, the water pump axle are leaked.
What can I do to tighten this leaked.
The pressure tank are fasted at fire wall in the engine area as high as possible. I have cat the overflow pipe and connected the
hose.
Bengt From Sweden
How are you doing, skip.
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Joined: Nov 2006
Posts: 2,418
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Nov 2006
Posts: 2,418 |
I have some difficulty to understand why you have to put on a pressure tank. The cooling system of the 31 is normally quite open, and if too hot, the water will run through the over flow pipe line. This is also a safety precaution, f.ex. to avoid leakage in the water pump, and the radiator cap to go wild when opened.
If the engine is turning too hot, check that you are NOT driving on low ignition, and that the radiator is filled to the neck. If you still have problems, clean out the radiator, specially the bottom tank. If you do not have the side panels at the lower part of the engine, you should install such for better cooling. You can find them on eBay now and then.
Gary Wallace is selling the special tool for tightening the nut outside the water pump, and he also has the packing material inside the pump.
Do not tighten the nut and the fan belt too hard, and remember the right grease in the cup, and turn the cup now and then.
Remember the cup on the distributor as well.
Solan G, # 32797
Take advantage in your hobby by being member of VCCA!
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
Hi Ya Bengt! I'm doing just fine and thanks for asking my friend.  :) :grin:
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
I suspect that the pressure might be due to an overflow tank and not pressure cap. I don't know of a pressure cap that will function with the original 1931 radiator neck. There is no ledge to seal against and all the caps of which I am aware require a sealing surface to funtion. If it is indeed an overflow tank it will increase the internal cooling system pressure but not enough to cause any appreciable leaking on a properly maintainted pump. In fact many of the vehicles (including one of mine) that participate on VCCA 4 or early 6 tours have overflow tanks.
How Sweet the roar of a Chevy four!
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Joined: Jan 2002
Posts: 108
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jan 2002
Posts: 108 |
Hello.
Skip. I am glad here from you my friend.I am wery well.
My car was going hot before I monted the pressure tank.
My car is in original, a new radiator and cleaned engine.
I do not now if there are an over pressure or not in the cooling system,I have not tested,but the water are left in the cooling system. Befor I have to fill water many times during a summer.
This summer I have not filled water in the coolant system and the car goes cold, so I am satisfied.
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Joined: Nov 2006
Posts: 2,418
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Nov 2006
Posts: 2,418 |
Nice to see you have got a normal heated engine with the extra tank. Still you should try to find why the engine turns hot without that tank. I had difficulties with keeping the water in the radiator, due to repeated overflow, but after adjusting the distributor, the problem vanished. I have driven 1500 miles this summer with only adding 2 litres.
Earlier I tried Bar's Leak trying to stop what I thought was a leakage, but due to the open cooling system of 1931, (not pressure) this method does have only little effect.
Solan G, # 32797
Take advantage in your hobby by being member of VCCA!
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