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Old 05-20-2012, 06:27 PM   #1
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Overflow question

My overflow is squirting out antifreeze on the underside of my hood I have a new radiator thermostat and radiator hoses my question is does anybody know why this is happening my jeep does not run hot I have 185 degree thermostat in it

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Old 05-20-2012, 06:37 PM   #2
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How many pound pressure cap?

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Old 05-20-2012, 06:38 PM   #3
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16 lbs its a new cap maybe year and a half old
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Old 05-20-2012, 11:05 PM   #4
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Could be your coolant is boiling. Can you hear it bubbling after shutting off the engine? Get a new 18lb cap at Auto Bone. $4.99.
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Old 05-20-2012, 11:57 PM   #5
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Year and a half isn't new. I'd start with a new cap.
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Old 05-21-2012, 12:59 PM   #6
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I believe it is supposed to have a 195 thermostat in it...they run at 210.
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Old 05-21-2012, 01:09 PM   #7
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Yep a 195 is stock.
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Old 05-21-2012, 01:49 PM   #8
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Quote:
Originally Posted by Redjeep99 View Post
why this is happening
simple:

you've overfilled the antifreeze. antifreeze volume expands when it gets hot, and the excess fluid has to go someplace. that someplace is out the overflow port.

you haven't addressed the poorly designed overflow port, so fluid sprays all over the inside of the engine compartment. the fix is easy.

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Old 05-21-2012, 05:22 PM   #9
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I had the same problem and solved by replacing the radiator cap
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Old 05-21-2012, 07:58 PM   #10
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Happens to mine every time I go offroad - I've always put it down to the bouncing around.
The first job for this weekend will be attaching a hose like the pic UnlimitedLJK04 has posted.

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