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Unread 04-17-2013, 02:37 PM   #1
brewcity1
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2004 WJ 
 
Join Date: Nov 2008
Location: Milwaukee, Wisconsin
Posts: 746
Steam from front grill at start up...then gone.

Hey guys...I have some steam coming from the front of the grill (assume its steam, and not smoke...doesnt smell like anything is burning). It started about a week ago...it only happens for about 2 minutes when I start the Jeep, then its gone. No coolant level drop in the reservoir yet, and the temp gauge stays right at 210. I dont notice any leaks, and there is no weird smells or sweet smells like coolant. No parts swap recently regarding the radiator or hoses either. It does go just above 210 if I am sitting in traffic, but then right back to 210 when I start moving at a good pace.
Any idea what the heck is going on? I searched the forum for "Steam" but couldnt find anything related to my issue. I am totally stumped!
Thanks for the help on this...I appreciate it.

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Unread 04-17-2013, 03:23 PM   #2
T-nave
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1998 ZJ 
 
Join Date: Jan 2012
Location: Grand Ledge, MI
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Does it do this on start up when the motor is cold ? If so it isn't steam b/c the motor isn't hot enough to create steam. Have you got under it to see if there is any coolant anywhere? Mine didn't really have any "noticeable " leaks until you looked under it. It was so slow that it would take a while to notice a drop in coolant. When I took the radiator out I couldn't believe it was still in one piece.
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Unread 04-17-2013, 03:28 PM   #3
Foundrydude
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1995 ZJ 
 
Join Date: Jan 2011
Location: Flatsville, IA
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Most times I've seen that it's either

Underhood exhaust leak (cold weather)
Or a weeping radiator that's growing a small wet spot overnight, but not leaking enough to hit the ground yet
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Unread 04-17-2013, 06:29 PM   #4
brewcity1
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2004 WJ 
 
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Location: Milwaukee, Wisconsin
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Quote:
Originally Posted by T-nave View Post
Does it do this on start up when the motor is cold ? If so it isn't steam b/c the motor isn't hot enough to create steam. Have you got under it to see if there is any coolant anywhere? Mine didn't really have any "noticeable " leaks until you looked under it. It was so slow that it would take a while to notice a drop in coolant. When I took the radiator out I couldn't believe it was still in one piece.
It does do it on start up...like this morning.
Now you have me worried something is burning!
I did check for coolant, and didnt see any. I'll let it run for awhile, and see if I can spot anything or smell something distinctive.
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Unread 04-17-2013, 06:45 PM   #5
Foundrydude
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1995 ZJ 
 
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A valve cover leaking onto an exhaust manifold can also create wispy smoke on first start of the day
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Unread 04-17-2013, 07:12 PM   #6
brewcity1
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2004 WJ 
 
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Location: Milwaukee, Wisconsin
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Quote:
Originally Posted by Foundrydude View Post
A valve cover leaking onto an exhaust manifold can also create wispy smoke on first start of the day
OK...I'll check that as well....thanks a lot for the help with this.
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