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overfill leak

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Old Nov 17, 2010 | 10:05 AM
  #1  
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79bigblock
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From: moulton
overfill leak

so i need an answer my 79' f150 leaks antifreeze out of the radiator overfill... is it the cap maybe not holding pressure??
 
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Old Nov 17, 2010 | 02:37 PM
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Make sure you fill it no higher than 1" below the sealing ring of the rad cap

Lots of people make the mistake of overfilling the rad
 
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Old Nov 17, 2010 | 03:36 PM
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I would guess bad cap or overfill as mentioned. You could add in a coolent recovery tank, fill the radiator all the way up and add a little in the recovery tank. Overflow goes in the tank, then is pulled back in as it cools down. Keeps air out of the system .
 
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Old Nov 18, 2010 | 10:09 AM
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From: moulton
thanks Jim Collins i went o reilleys yesterday and got a Murray 16 psi cap and it is working great.
 
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Old Nov 18, 2010 | 05:35 PM
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Originally Posted by 79bigblock
thanks Jim Collins i went o reilleys yesterday and got a Murray 16 psi cap and it is working great.
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I don't know how much psi the radiator will handle, but you want to remember you have a heater core under pressure too, so don't overdo it with the psi. I found that out a few years ago with a new radiator and a old heater core. I put a cap on that had more psi than what was recomended for the vehical . You can guess what happend, blew the heater core and hot water in the floor all at once, not fun.
 
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Old Nov 18, 2010 | 08:00 PM
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hey jim im dumbfounded with this one. but i bought 35/15.50/15 swampers for my 1979 f150 will they fit on a regular batman rim or eagle alloy bullet hole rim? or will they rub the coils ?
 
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Old Nov 19, 2010 | 07:42 AM
  #7  
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Originally Posted by 79bigblock
hey jim im dumbfounded with this one. but i bought 35/15.50/15 swampers for my 1979 f150 will they fit on a regular batman rim or eagle alloy bullet hole rim? or will they rub the coils ?
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Sorry i can't help on that but somebody will see it a tell you. JIM
 
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