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Unread 06-13-2015, 08:25 AM   #1
rouxbicon
Registered User
2003 TJ Wrangler 
 
Join Date: Oct 2005
Location: Baton Rouge, La
Posts: 592
changing spark plugs in '06 3.7?

TJ guy here temporarily crossing over from the dark side...asking on behalf of my old man who has an '06 KJ with the 3.7...

How big of a job is changing the plugs? He is in his mid-70s and not too interested in doing it himself, so he called the local dealer and asked about it. Seems like they told him it was a big ordeal, involving pulling the intake manifold!?!...and would be a substantial cost. Didn't sound right to him, so he called me and asked...didn't sound right to me, either, but since he is across the country I can't look at it in person or do it for him.

Couple of writeups here and on other forums seem to indicate the job is not too bad and his local dealer is trying to jerk him around...

Comments, advice...?

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Unread 06-13-2015, 09:29 AM   #2
streetglideok
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2005 KJ Liberty 
 
Join Date: Jul 2011
Location: Colorado Springs, Colorado
Posts: 2,759
I can do mine in under 20min. 6 coils on plugs, you unplug and remove the coils to access the plugs. The coolant res. would need to be unbolted from the firewall for the right side. Don't have to remove coolant lines, or anything, just remove the two retaining nuts, and slide it off, and move it out of the way to reach the back coil or two. NGK or Champion copper plugs gapped to spec is all you need.
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Unread 06-13-2015, 07:44 PM   #3
Leeann_KJ
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2005 KJ Liberty 
 
Join Date: Aug 2013
Location: Edgewater, Maryland
Posts: 171
What kind of raping dealer did he call?

Those are the easiest V6 plugs to change that there are. They point straight up. Remove one 10mm nut, unclip electrical connector, twist coil off plug. Swap plug, replace coil.

I suggest he find a local shop to do them and never have any dealings with that dealer again...in fact, contact Chrysler and complain about their lying and predatory practices.
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Unread 06-21-2015, 09:38 AM   #4
BobFromCO
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2006 KJ Liberty 
 
Join Date: May 2010
Location: Colorado
Posts: 89
Holy cow, that dealer is awful. This is one of the easiest vehicles I've seen to do a plug change.
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Unread 06-21-2015, 12:21 PM   #5
draperjojo
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1946 CJ2A 
 
Join Date: Nov 2007
Location: Salt Lake, Utah
Posts: 284
If he attempts it, make sure you blow out around the spark plug before he removes it. The spark plug is down in a ways and apparently mice and squirrels like to eat nuts on top of the motor. 2 of my Liberty's spark plug holes were packed with pieces of shell....
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