a ticking into a knocking

[floyd5194]

Hey all you jeep guys, I have a 1997 Grand Cherokee that just tripped 197,000 miles and now has a constant ticking that increases with engine speed but now has now turned into a knocking sound. It still idles, runs, accellerates and drives perfect. I had it check out by a well known shop and was told that I need a new motor that the knocking is coming from the bottom end. Any ideas before I invest into a new motor?

 

[floyd5194]

UPDATE: The knocking sound was caused by a piston. My wife had her brother check it out and he found that one of the pistons had broken the entire side off at a angle that ran from the connecting rod up through the oil screen and just millimeters under the rings. The rings both survived undamaged as well as the cylinder wall. I guess i was lucky in a way.:givemebeer:

 

[mrfast]

What size motor was it? and are you overhauling the motor or replacing it?

 

[floyd5194]

What size motor was it? and are you overhauling the motor or replacing it?

Hello, it is a 4.0 and he went ahead and overhauled it. My wife is currently driving it and told me it runs great with no noise. I unfortunately won't be able to drive it for awhile because i am currently deployed to Kuwait so she keeps me informed on it.

 

[mrfast]

Glad to hear the overhaul is working out and it's running great! I have 115,000 on my 4.0 and look forward to several more trouble free years.

Hope everything is going well in Kuwait, and keep safe.

 

[floyd5194]

Thank you very much. I'm sure that you should be able to enjoy it years from now. After i bought mine in 1999 with a little over 72,000 miles on it nothing else I have driven is the same. When mine finally bites the dust odds are i will probably get another one. once again thanks