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Old 05-27-2010, 09:51 PM
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radiator cap won't open.

has anybody tried to open the radiator cap on their WK? my '05 GD's radiator cap does not open. it twists, but when i pull it does not open it seems to be locked. When Idle, my jeep revs up on its own from 0.3K RPM to 0.8K RPM, then back down to 0.3, and up again, and so on. a mechanic told it's because there is no coolant. i bought the coolant but, again, i cant take out the radiator cap.
wats the deal?
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Old 05-27-2010, 09:54 PM
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Re: radiator cap won't open.

try to push down while turning it, it is designed this way so that you can release the pressure and not melt your face off. once you have it half way just push downward on it and then turn it the rest of the way off and it will come right off
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Old 05-27-2010, 10:01 PM
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Re: radiator cap won't open.

you should be using the resevoir. its a closed presurized system.

so you will never get it FULL thru radiator cap.

put coolant in the overflow and drive it turn on the heat too to help get airt out of the system. park it check overflow in an hour or two. keep adding fluid this wy until; it stabalizes.
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Old 05-27-2010, 10:03 PM
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Re: radiator cap won't open.

Try this:



JK!! Try this.. http://www.wkjeeps.com/wk_cooling.htm
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Old 05-27-2010, 10:11 PM
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Re: radiator cap won't open.

How to install: 180* tstat for 4.7L

More than you need...but its in there and its got pictures
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Old 05-28-2010, 10:39 AM
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Re: radiator cap won't open.

it worked! thanx for the links those guys are great! all that was missing was the pushdown and then twist. but the revving while idle is kinda still there. up and down, up and down! may i need a flush. thats what i'm gonna try.
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Old 05-28-2010, 10:56 AM
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Re: radiator cap won't open.

Quote:
Originally Posted by bullet700 View Post
it worked! thanx for the links those guys are great! all that was missing was the pushdown and then twist. but the revving while idle is kinda still there. up and down, up and down! may i need a flush. thats what i'm gonna try.
Throttle position sensor, replace it. Your coolant is likely fine.
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Old 05-28-2010, 12:44 PM
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Re: radiator cap won't open.

Yeah if you've got coolant and your reservoir is to the full mark... its not the coolant.

TPS is one thing... think there was a computer update that fixed that issue as well... There are a few others i recall reading about...but coolant being the cause... definitely not. Might as well find another mechanic as well... that's just a bogus claim that it could be that.
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Old 05-28-2010, 03:51 PM
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Re: radiator cap won't open.

ok, I dig the input. will check it out. thanx
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