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Old 08-26-2012, 10:05 PM   #1
Jlobb's Avatar
Join Date: Aug 2012
Posts: 17
Slight knock or Tap at startup

Well, to be honest, this board and the pentastar engine head problem has made me a bit paranoid. However , when my new 2012 JKU sits for several days, I get about 3-5 seconds of a tap at start up. It's only at start up and goes away quick . Everything else runs quiet. (for now) I have heard its the oil just coming up thru the engine a well as some "other reasons". For those who really know on this forum, can I have your advice on this . ?? Would appreciate your mechanical honesty.

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Old 08-26-2012, 10:22 PM   #2
Blastek's Avatar
Join Date: Mar 2012
Location: Portland, OR
Posts: 2,430
we're told it's normal. just a few seconds for the oil to get on the valvetrain. don't worry about it. this is different from the idle ticking noise that's being reported.

2012 Deep Cherry Red JKU Sport S - Tickastar, 6 speed, 3.73, Dual Tops
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Old 08-26-2012, 11:02 PM   #3
ilikeguns's Avatar
Join Date: Apr 2012
Location: Long Island, NY
Posts: 736
I get it too.. less since I switched to synthetic.. but that could be an anomaly..
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