Radiator Cap??

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Sep 7, 2012 | 02:10 PM

Supercab

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From: Palm Bay, Florida

Radiator Cap??

-How would I tell IF its gone bad? would it leak to the point I'd see coolant spilling/being pushed out? years? miles?

Sep 7, 2012 | 04:00 PM

Shake-N-Bake

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From: Mesa AZ

Quote:

Originally Posted by Supercab

-How would I tell IF its gone bad? would it leak to the point I'd see coolant spilling/being pushed out? years? miles?

The dealer has a pressure tester that can check the cap. Many auto parts stores do as well.

I usually give the upper radiator hose a squeeze and listen for air whistling in and out past the cap. Air should not escape when squeezing the hose...

I have found the o-rings in the cap shrink up over time and allow air to escape. You can try turning over the o-ring and see if the caps seals better. That has worked for me once or twice...

Sep 7, 2012 | 05:12 PM

A/Ox4

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From: Missouri

Checking the Cooling System for Leaks - YouTube

Sep 7, 2012 | 07:02 PM

Ponyboychris

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From: Kiowa CO

When my cap failed, it would leave dried antifreeze residue on the hood insulation. A nice spray pattern. It would only loose a little fluid but made a mess.