1990 YJ 4 banger knocking when warm - JeepForum.com
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Unread 11-29-2011, 10:09 PM   #1
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1990 YJ Wrangler 
Join Date: Jul 2011
Location: Buffalo, NY
Posts: 5
1990 YJ 4 banger knocking when warm

Hello trying to diagnose what might be causing a knocking noise that has suddenly developed. If i drive around short distances i hear no knocking however if i drive longer distances and let the motor warm up i start to get a pretty noticeable knocking from the top of the engine. Just curious if anyone can point me in a direction to look in. Also i notice my oil pressure starts to fluctuate wildly when the knocking starts.

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