How did you time? did you verify the positions of the cams with a 4mm pin flat against the head surface? crank at OT? intake sprocket turned CW?

Yup did everything. I知 100 percent the timing is spot on. I checked.. rotated the engine double checked.. rotated a few times checked again. Variable Intake cam sprocket turned clockwise. I ran a shope inside and there痴 no physical damage. Piston top is untouched.

__________________
1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

Post the compression data of all 6 cyl with spark plugs removed. Obviously there is a mechanical fault (since 0 compression at cyl #6) I would get that sorted first.

Ok I値l do that after work.

The only thing I can think of is that I put a lil bit of oil on the cylinder walls .. maybe it pooled on the piston and hydro locked or I had an issue with the exhaust cam being out of timing when I installed the head. I didn稚 force anything. Maybe that was enough to bend a valve a little.

__________________
1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

Head is off. Number 6 valves are bent a lil. Not fully seating.

__________________
1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

what about cylinders 4,5 ?better check all of them, did you get a head gasket yet ? I may have 1 ill donate to your cause, im an mb tech was given about 4 104 gaskets from another engine guy that moved, im in L.A, just come pick it up im off Monday, I even have used valves if you need them

Number 4 and 5 appear to be ok. I値l have the shop check everything. I was going to do a big pelican parts order next Friday. I probably could use those valves tho. The machine shop will definitely charge me a good penny for theirs. What part of la? It値l be about a 2+ hour drive for me

__________________
1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero