Brief engine rattle at start-up
#1
JK Newbie
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Join Date: Feb 2010
Location: Victoria, TX
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Brief engine rattle at start-up
My wife is primary driver of our 2010 unlimited Rubicon. In Colorado last week and noticed a brief rattle/tapping noise from engine at start-up. Basically sound like valve chatter. Thought it was the cold weather, but wife mentioned it is a normal occurrence. Is it normal for the 2010 JK to make this noise?
#2
JK Junkie
Sounds like dry start to me. Certain oil and filter combinations make this worse or better.
Personally I have had really good success with conventional oil and WIX filters.
Personally I have had really good success with conventional oil and WIX filters.
#6
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Join Date: Jul 2011
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Definitely sounds like dry start to me as well. This happens to my '11 JK as well and happened to my '09 ford fusion. I believe there is a thread on this topic on this forum but forget what it's called. I think there were people on that thread that found oil/ filter combos that stopped this from happening.
#7
I recently call our local dealership, they said its normal and they cant do anything about it, It's just the design. I have a 2011 jku just over 11k and it only does it when it is really cold outside
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#8
JK Enthusiast
Originally Posted by Jeeper John
My wife is primary driver of our 2010 unlimited Rubicon. In Colorado last week and noticed a brief rattle/tapping noise from engine at start-up. Basically sound like valve chatter. Thought it was the cold weather, but wife mentioned it is a normal occurrence. Is it normal for the 2010 JK to make this noise?
Another angle is discussed in this thread and others like it:
https://www.jk-forum.com/forums/show...e-start-Lubers
I do not endorse my pre-oiler approach other than to say it is the way I played with the problem. (Your needs may differ!)