SoCalManche Posted December 17, 2023 Share Posted December 17, 2023 I've got a TJ that I recently replaced the head gasket on. Once I fired her up for the first time since the replacement, she was EXTREMELY chattery, well beyond the typical lifter tick. Everyone told me it was an exhaust leak, but wasn't so sure. Dropped the oil pan just now and this is sitting at the bottom. What's it look like to you? It's both metal and plastic material absolutely wrecked. She drove like a bat out of hell before I dropped the pan. She was just so damn loud I needed peace of mind before I continued to try to solve the problem, but of course, a new can of worms has opened up! So whatcha think? Link to comment Share on other sites More sharing options...
SoCalManche Posted December 17, 2023 Author Share Posted December 17, 2023 This is also the source of the main chatter when I was rotating the crank to TDC before checking rockers/pushrods/lifters. Normal? https://gopro.com/v/72GDpNdwanmXz Link to comment Share on other sites More sharing options...
Big_Mark Posted December 18, 2023 Share Posted December 18, 2023 Is it a charm bracelet? Other than that I have no idea Link to comment Share on other sites More sharing options...
Pete M Posted December 18, 2023 Share Posted December 18, 2023 Link to comment Share on other sites More sharing options...
Htchevyii Posted December 18, 2023 Share Posted December 18, 2023 It looks like the 2.5 has a spring loaded tensioner for the timing chain. I'm guessing that it exploded. https://wranglertjforum.com/threads/what-is-wrong-in-this-99-tj-2-5-timing-case.67296/ Link to comment Share on other sites More sharing options...
fiatslug87 Posted December 18, 2023 Share Posted December 18, 2023 ^^^Winner Link to comment Share on other sites More sharing options...
Andy in Pa Posted December 18, 2023 Share Posted December 18, 2023 Wow!!! Never knew there was such a thing on the 4cyl. Well played htchevyii Link to comment Share on other sites More sharing options...
SoCalManche Posted December 26, 2023 Author Share Posted December 26, 2023 Forgot I posted this on Comanche Club! After I sent the post, I went outside and got under the engine, and just turned around so I was facing the timing chain. Saw another elongated piece of black plastic sticking out from where you can see the timing chain, and I knew immediately. I have no idea why it grenaded itself, but I'm more impressed the chain held without snapping because she was pretty loose and I should have totally grenaded my motor. Got a new timing chain and tensioner and she's good as new. Now off to the next issue...an exhaust rattle! Merry Christmas! Link to comment Share on other sites More sharing options...
pizzaman09 Posted December 26, 2023 Share Posted December 26, 2023 Sometimes you just luck out! Are the 2.5L engines interference engines? Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted December 26, 2023 Share Posted December 26, 2023 You sir, should play the $2 lotto, buy some cracker jacks or open a chinese fortune cookie or something.... That's a major win all around! Link to comment Share on other sites More sharing options...
AZJeff Posted December 27, 2023 Share Posted December 27, 2023 On 12/25/2023 at 8:07 PM, pizzaman09 said: Sometimes you just luck out! Are the 2.5L engines interference engines? Engines if the 2.5 and 4.0 era are virtually NEVER “interference engines”. Link to comment Share on other sites More sharing options...
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