PLEASE HELP...............'89 420SE rattle
 

When my 420 is warm, occaisionally there is a rattle when i start up. I think it may be somethin to do with the oil pump but i am not sure. This rattle stops as soon as the oil pressure rises to full. What can i do to get this fixed. I remember at some point having this on my 380 at some point which is why i think it may be a common prob. I cjhanged the timing chain and tensioner cos i thought that was the cause, but it wasn't. I also know it needs an oil change again.

Is it serious or will it not take much to fix it.

Ta....

how long has it been since it had a chain?
sounds like a tensioner/guide rail/chain issue.


Joe

I think i shell replace the chain. I think it is the origional one. it has done 120.000miles. How hard is it to change the guide rail??

the rails aren't bad but, if you are not comfortable with messing with something that than cause serious engine and wallet damage, I'd find me a qualified shop to do the repairs. I would replace the cahin, guides X 4, tensioner and look hard at the cam gears, reseal the oil tubes for the cams at the same time. (cam gear wear is not much of a issue with the double row chains but, will wear if run for long periods with a worn chain)



Joe