engine troubles, not sure if normal
04-15-2014, 11:56 AM
#11
JK Newbie
Join Date: Dec 2012
Location: Plaquemine Louisiana
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
My 3.8 sounds like a sewing machine. The ticking noise comes from around the injectors. I have been told that the 3.8 has noisy injectors. I have been having my JK for over 2 years and the noise has not gotten better or worst. Scared of what they may find if I take it in to be looked at. I have right around 63k miles on my 2007.
04-15-2014, 12:11 PM
#12
JK Enthusiast
Thread Starter
Join Date: Oct 2012
Location: miami, fl
Posts: 204
Likes: 0
Received 0 Likes
on
0 Posts
I really can't explain it better than what i did, I don't know much about engines and what i would really like to hear what a normal jk 3.8 sounds like to see if mine is the same. as far as the rattle under load i don't know where else to look or what to tell the dealer. I have gone under the jeep and banged around with a rubber mailet and couldn't really replicate anything
04-15-2014, 12:27 PM
#13
I ran mine 93K miles. Changed only because I was installing dual-battery tray, so it was convenient. No difference in vehicle performance/MPG before and after. Plug gap is a starting place for optimal performance. Plugs are fine as gap widens. They are designed that way. Are you sure 50 thousandths gap is correct? Would double-check that.
04-15-2014, 12:45 PM
#14
JK Enthusiast
Thread Starter
Join Date: Oct 2012
Location: miami, fl
Posts: 204
Likes: 0
Received 0 Likes
on
0 Posts
Also could the "rattle" be engine knock? its more of like gravel in the engine sound. I don't know what engine knock exactly sounds like though.