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Unread 06-04-2013, 12:47 AM   #1
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1985 CJ7 
Join Date: Sep 2010
Location: Seal Beach
Posts: 36
Radiator Replace?

1985 CJ7 4 Cyl.

I just replaced a cooling fan clutch today, and while doing this, I checked my radiator, and all the little fins are falling off.

I actually ran my finger down one of the columns and they crumbled like bread crumbs.

This must be due to age, but is it time for a new radiator? Would these crumbling / eroding fins have any significant effect on the cooling system in general?



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Unread 06-04-2013, 01:21 AM   #2
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1986 CJ7 
Join Date: Feb 2011
Location: Muskegon, Michigan
Posts: 2,019
Eventually; yes. Their job is to dissipate heat from coolant by the air crossing over them. When there isn't enough fins to do this, it will overheat. Replace now????? Good question for your local radiator shop.

Dave in Muskegon
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Unread 06-04-2013, 11:00 AM   #3
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1979 CJ5 
Join Date: Mar 2013
Location: Augusta, Ga
Posts: 47
given the relative ease of a radiator swap, I'd say absolutely. with fins crumbling, it isn't doing much cooling anyway. Soon it will be leaking.
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Unread 06-04-2013, 11:04 AM   #4
John Strenk
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1976 CJ5 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 14,603
Just thinking if you do replace the radiator. And you should.
Project 23 has a radiator with a built in switch for electric fan. I bet a set of electric fan would help that little engine.
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