Rod knock, maybe?
05-01-2009, 01:20 AM
#17
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Model: Cherokee
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
05-01-2009, 08:56 AM
#19
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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.
05-01-2009, 09:15 AM
#20
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
X 10, sounds like loose torque converter bolts to me, as well.
06-10-2009, 03:05 PM
#21
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Year: 1992
Model: Cherokee
Engine: 1995 ZJ 4.0
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.
06-13-2009, 05:52 PM
#23
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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
06-14-2009, 07:28 PM
#25
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Year: 1996
Model: Cherokee
Engine: 4.0
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.
06-14-2009, 09:17 PM
#27
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Year: 1987 MJ, 1973 J2000, 1986 XJ, 08 JK
Model: Comanche (MJ)
Engine: 4.0L H.O
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
06-14-2009, 09:34 PM
#28
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Year: 1992
Model: Cherokee
Engine: 1995 ZJ 4.0
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
06-15-2009, 03:14 PM
#29
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Year: 1987 MJ, 1973 J2000, 1986 XJ, 08 JK
Model: Comanche (MJ)
Engine: 4.0L H.O
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
06-21-2009, 09:29 PM
#30
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Model: Cherokee
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 ?
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 ?