here we go.....I have an 02 Disco with 91K miles. i have had a hell of a month with my rover. on a cross country trip i ended up standed in montana. i had the local mechanic there communicate with my rover mechanics to diagnose the problem. the mechanic in montana initially thought rod knock while my rover mechanics thought it was a cracked flex plate. i decided to have the flex plate changed out (not a small job). turns out this did not solve the problem. i had to leave the truck in montana and continue my trip back east. i had it shipped back and it arrived the other day (with some scratches from careless handling, a whole other frustration). Anyway, i am taking it to a friend of a relative who works on rovers to try to get to the bottom of this. it is my thinking that the montana mechanic was correct in thinking rod knock. however, there are some things that make me wonder how this could have happened. 1) the truck has been maintained to a T using dealer and independent rover specialists in san diego. 2) no check engine light illuminated and i did not overheat. 3) the truck received its 90K service a couple days prior to leaving and there were no outstanding service/maintenance issues. 4) the mechanic in montana took a small sample of the oil. he noticed trace amounts of metal but he did not think it was a significant amount that would be expected with a rod knock.

in a nutshell the problem is a knocking sound that occurs when accelerating/decelerating or when reving the engine when the truck is motionless.

any thoughts/shared experience would be greatly appreciated.

-Mark

 

running premium octane?

 

always used premium.

 

Don't wast alot of time, pull the pan and have your mechanic inspect the bearings.
If you wanted to narrow it down a little, start it up and while at idle, pull one plug wire, carefully, if the noise get better you found your cylinder. Do this to each cylinder, one at a time then replace the wire.