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Old 01-27-2012, 08:06 PM   #1
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Cool 2008 Wrangler 3.8 4dr Engine Knock

Hi Guys. I have been a mechanic for 28 years now. I have run training centers for Goodyear and Precision tune . I had been a master ASE technician for most of that time. I just bought a used 08 wrangler. Love it. Second Jeep I have owned. It has 22000 miles on it and I noticed a Small knock at start up. It only last for a second. I noticed a Mopar filter on it and wondered about the check valve in the filter. Since it is horizontaly located this would be my first guess. It also was 1/2 qt low but It was that way when I picked it up. No leaks from timing cover, and everything else is dry. After eading some other posts I have some advice to offer.

During engine builds its not uncommon for the rings to be improperly clocked. the should be placed at 120 degrees of eachothers ring gap.. I have seen this often over the years in high oil consumption vehicles. Just a thought for you guys. I will try the Wix filter for this engine and synthetic oil for the next oil change I do. I will post any updates on the knocking and consumption if it continues or if its corrected. Great job on the Forum guys..

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Old 01-27-2012, 08:19 PM   #2
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Old 01-27-2012, 09:41 PM   #3
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Old 01-27-2012, 11:53 PM   #4
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Old 01-28-2012, 04:58 AM   #5
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Old 01-28-2012, 06:48 AM   #6
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Old 01-28-2012, 12:19 PM   #7
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Thanks for the great welcome folks. I hope to contribute to the forums as much as possible.

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