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over heating 350
#44529 August 03rd 2004 7:39 pm
Joined: Jul 2004
Posts: 131
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does anyone have any suggestions? i just put in a carb. 350 in my astro...its over heating terribly just going 5 miles to work. i have and electric van and have replaced the hoses and thermostat and still nothing. i made it half way to Lost Memorial Day Weekend and half way to Phuckrwee 13. I would like for my van to make Super Somer. Please help if you can.

Re: over heating 350
#44530 August 03rd 2004 8:33 pm
Joined: Jun 2004
Posts: 90
journeyman
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Do you have a direct fan or a clutch fan on the motor? ,
If you have a clutch fan , make sure it is working . Spin the blade & see what it does & if it is too loose ,replace the clutch. Good water pump . There are sum things to look at .

Re: over heating 350
#44531 August 03rd 2004 10:48 pm
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My Astro with a 350 V/8 had an electric fan mounted to radiator between engine and radiator pulling air in and a second fan between radiator and grille pushing air thru, seemed to work ok but I am not a big fan of electric fans so we changed it to a 21 inch flex fan mounted to engine,has not overheated so far.We kept the smaller fan mounted as a back up and turn it on when stuck in traffic.

Re: over heating 350
#44532 August 04th 2004 5:47 pm
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Did you change the belt configuration? Just a thought but maybe your water pump is running backwards? [Confused]

Re: over heating 350
#44533 August 07th 2004 7:43 pm
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thanks for all the input guys...i'll have to give those a whirl...whether the van gets running right or not i will be at Super Somer 3....

Re: over heating 350
#44534 August 08th 2004 2:41 am
Joined: Feb 2004
Posts: 985

National Truckin Board Rep
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Did you have the radiator punched and cleaned before you installed it? A clogged radiator will do the same thing

Re: over heating 350
#44535 August 08th 2004 2:27 pm
Joined: Jan 2001
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old hand
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how new was the 350? A mech. told me to do this if I felt the cooling system was clogged. disconnect the bottom hose, take of the top hose and take out the themostat. Reconect top hose and insert good presure garden hose in filler spout. Then fill to top or until water comes out of bottom hose. keep hose running in the radiator and start and run engine until it is hot. When water runs clear again, (could take some time) radiator is clean. This will also tell you if your pump is working good......good luck with this...............Pup

Re: over heating 350
#44536 August 30th 2004 10:51 am
Joined: Apr 2001
Posts: 1,097
old hand
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If the water pump is spinning in the right direction and if your electric fan is pushing or pulling air in the right direction and if the stat is not in backwards Go for a new rad ! 9 times out of 10 overheating is caused by a dirty rad.


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