Timing Chain Noise FIX...
 

Start with the simple one FIRST :eek:

400E w/102K mles
Typical Timing chain rattle...

:mad: Well after $1K :eek: the $13 valve "O" ring on the oil pump valve seat. I recorded the noise so there wasn't any doubt!

First visit - $750.00
parts replaced:
Timing chain
Upper rails
Chain tensioner

Second visit - $0.00
Re-check tensioner

Third visit - $250.00 (10 days later)
replace:
Oil pressure relief valve ($67)
Oil pump valve seat ($13)

Gee, he even tightned the oil pan gasket that was leaking for FREE! (and it still leaks)!:eek:

Oh Well :o guess it's good for another 100K miles:confused:
Anyone ever replace the lower oil pan gasket ($21) on a 4.2LV8?
Tks > BOBB

Start-up rattling noise - Timing chain - NOT
 

Here are pictures of the failed oil pressure relief valve "o" ring.
See next post for part number of the Oil Pump Valve Seat.
The relief valve ($63) [ small one ont he left] is A 119 180 00 15
807 40382 (that's all the numbers I can see)
>BOBB

The $13 valve and "O" Ring
 

The failed "O" ring
Oil Pump Valve Seat 110167D9D
LOC 10120692
A 119 184 01 30
1606-3699
DOC=271659-3