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-   -   Puff of steam from under hood 5.9 (http://www.jeepgarage.org/f78/puff-of-steam-from-under-hood-5-9-a-32425.html)

TheCaver 12-11-2011 11:17 PM

Puff of steam from under hood 5.9
 
After 10min of driving in cold weather, after stopping at a light, I sometimes get a small puff of steam from the grill. I have pulled over a few times, but to no avail. No leaks, and system is full of coolant...

Bizarre eh?

JC

Chaoul1 12-12-2011 12:30 AM

Re: Puff of steam from under hood 5.9
 
First welcome and we must see pictures of your 5.9L.

Check your cooling system. It could be your Radiator Cap.

Is it a lot of smoke or just a puff?

TheCaver 12-13-2011 08:48 PM

Re: Puff of steam from under hood 5.9
 
Will do, its just an occasional puff, right when it gets warm. Then it rarely does it again. Cap sounds like good logic, ill check it out.

Ill have to get some pics together, she's a dark grey stock 5.9 with 175k, still solid.

jlewissystem 12-13-2011 09:17 PM

Re: Puff of steam from under hood 5.9
 
Gotta love the ZJ's! Isnt that normal for the 5.X's or was that smoke ;) I miss mine..

mjl2610 12-14-2011 10:28 PM

Re: Puff of steam from under hood 5.9
 
My 4.7 does that only when it is cold and damp out from rain or snow. The only thing i can attribute it to is when I have noticed the moisture coming in contact with the hot radiator, thus creating steam. My cooling system is solid, there are no issues with it what so ever.

Chrissrt10 01-04-2012 03:35 PM

Re: Puff of steam from under hood 5.9
 
My 5.9 does that too. Never bothered me because it only happened every so often

1ABrian 02-02-2012 12:19 PM

Re: Puff of steam from under hood 5.9
 
No update huh? Just chock it up to "a Jeep Thing"

TheCaver 02-02-2012 10:50 PM

Re: Puff of steam from under hood 5.9
 
Well, I took the cap off and worked the spring around. Hasn't puffed in awhile...prob should replace it.

1ABrian 02-03-2012 11:43 AM

Re: Puff of steam from under hood 5.9
 
Cool, so ya think the pressure was just pushing coolant by? That would be an easy fix no doubt


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