So what was it?? Thanks

 

No clue. Hasn't come back. Last time it did was when I made an 100+mile trip and hot-doggin' it. I realized it only does it after and hour or more of driving on the highway.. It sounds a lot like a fan blade hitting the shroud - but that's not that case lol

 

Check the flex-plate. I had the same problem.

 

Check the Flex-Plate. I had the same problem it sounded like a wrist pin banging around. I checked the flex-plate by moving it back and forth. saw some movement here's a pic of the one I replaced.

 

X 10, sounds like loose torque converter bolts to me, as well.

 

Well I just got a XJ for a steal cause of loose Torque converter bolts and I but them back in and tightened them with red thread lock and I still have a little tick but it goes away under load so I think it is a wrist pin. Wrist pin knock usually goes away under load.

 

probally lifters......

 

I bought a 95 cheap with same noise. Changed Harmonic Balancer, knock is still there. Checked flex plate bolts, not sure how many supposed to have? The two I have checked so far were tight. How many were you missing? Thanks Stoney

 

It has four in the tourqe converter and only one was still in there and it was loose.

 

My xj has some rod knock mostly at idle, it sounds like a diesel. I started running 20w50 oil, took care of most of the noise. I think its about time for a rebuild.

 

Say so! I just can not figure out if it is a lifter or a wrist pin guess I'll have to wait till it goes out to know!

 

yea deff check the flywheel bolts.... my other jeep was making a sound like that and valves and everything was fine, ran excellent and everything and then a parts jeep came along so i bought it to replace the motor (my motor had 186k the parts jeep only had 113k so what the hell y not right?) well after paying $450 cash for the parts jeep and then starting the engine pull.. noticed the lose flywheel bolt, yes just one was scraping against the insp. cover.... so yea **** My Life... all is well now though

 

Was there something wrong with the 186K motor? I mean the 4.0 will go to like 250K? Do you still have the old motor?

 

lol unfortunately no... i sold it 2 weeks l8er ( this was all last summer of 08 ) one of my friends that was with me when i bought the parts jeep offered up on the old motor cuz it still ran fine so i let him take it for a cheap $200... the thing is still running too lmao

 

Hi!
I have a grand cherokee 2000 4 litres and i've noticed on the Torque converter bolts hit the plate betwen the enging and the transmition!!!! the 4 bolts are tight . the question is can i have a cracked flexplate or this is more serious probleme like cranck shaft bearing ?