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Author
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Topic: COOLING PROBLEM
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johnmustang
Gearhead Posts: 1586
From: Vancouver Island , British Columbia , Canada
Registered: Nov 2001
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posted 05-28-2002 10:58 PM
   
My newly re-built 289 tends to run quite hot , it has not boiled over yet , but , after driving it fairly hard for about an hour or so , I went and got gas , left the car at the gas station went across the street for a gallon of milk , came back and the rad had puked about 1/2 to 3/4`s cup of coolant out of the overflow hose. The total time I was away from the car from fill up to milk getting was about 10 to 15 minutes. When I am driving the car it runs into the high range of the temp gage. When I idle at a light the temp comes up pretty quick , I then go to neutral tap the gas a few times and the temp comes down a bit. Please correct me if I am wrong , but , does this indicate that my flow is O.K. , but , I need to pull more air through the rad , either by going to a shroud ( which I would prefer not to do ) or a bigger fan blade or both ? Elactric fan is out of the question , will lose my collector car status if I do that. Everthing to do with the cooling system is brand new , except the thermostat , but , it was only about 2 month old , it is a 180 , I will change it in a day or so , but , I don,t think that it will make any differance , the rad is a 3 row , the fan is a 4 blade , the pump is aluminum. Please throw any and all ideas at me . Also the weather has been fairly cool , and , I don,t have my hood on the car at this time. The motor has approx 250 miles on it at this time. JOHN  ------------------
65 2+2 FASTBACK
68 COUPE
87 TAURUS WAGON
98 F150 XLT TRITON V8 4.6, 4 WHEEL DRIVE
Member:Vancouver Island Mustang Association
M&M #1710
MyPhotoPage
MY TRUCK
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V8 Thumper
Gearhead Posts: 1103
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 05-28-2002 11:52 PM
Hey John (just my opinion, keep in mind...) GET A SHROUD. They're cheap insurance, really. The air won't have any choice but to flow through the radiator rather than around it. That cooling system was designed for a 215 hp 289... you could have 20% more than that now. That's a big jump  It dosen't suprise me one bit that the 'old' cooling system is working hard to keep up. Another thought... do you have room for a thermal fan clutch? You'd still need the shroud IMHO
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TomP
Gearhead Posts: 3815
From: Delta BC Canada
Registered: Dec 99
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posted 05-29-2002 01:50 AM
If the engine is new it may run a bit hot for a while, you shouldn't let it overheat though. Other things to check for are rad hoses collapsing, sometimes the hoses can be sucked flat. Check the rad cap too.
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johnmustang
Gearhead Posts: 1586
From: Vancouver Island , British Columbia , Canada
Registered: Nov 2001
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posted 05-29-2002 08:41 AM
quote:
Originally posted by TomP:
If the engine is new it may run a bit hot for a while, you shouldn't let it overheat though. Other things to check for are rad hoses collapsing, sometimes the hoses can be sucked flat. Check the rad cap too.
This may sound stupid , but , what should I be looking for with the rad cap. I have a 13 on the car now , and , it seems to be good , nice tight fit with no seepage. JOHN ------------------
65 2+2 FASTBACK
68 COUPE
87 TAURUS WAGON
98 F150 XLT TRITON V8 4.6, 4 WHEEL DRIVE
Member:Vancouver Island Mustang Association
M&M #1710
MyPhotoPage
MY TRUCK
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jkilroy
Gearhead Posts: 1431
From: Vicksburg, MS
Registered: Dec 99
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posted 05-29-2002 09:51 AM
Get a shroud.------------------
Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"
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64FalconF-16
Journeyman Posts: 42
From: Celina, Republic of Texas
Registered: Feb 2002
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posted 05-29-2002 10:45 AM
My Dad always used a formula. Probably one he made up. But it seems to work. 180deg Thermostat = 16lbs cap. 160deg Thermostat = 13lbs cap. He always measured his cap by the thermostat degree 18(0) minus 2 = 16 Also get a shroud. Any motor over 350 HP we always put a 20 plus lb cap. More HP means more heat and so you need to control the boiling point in the cooling system with the higher lb cap. ------------------
64 Pro-Street Falcon
351C 4V 8.1s in 1/8
79 Ford Bronco 4 X 4 Lifted 6"
400 9.9s in 1/8
70 Plymouth Cuda'
440 Magnum. 2600#
Race Car 6.90 in 1/8 [This message has been edited by 64FalconF-16 (edited 05-29-2002).]
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