Can anyone tell me if the 603 is an "interferance" motor...ie, will valves meet
pistons,should the timing chain fail?.....I have been reading all kinds of threads
about "when" to change the chain...& fully understand the procedures to
check the chain stretch...but w/the hydraulic lifters vs the 617's where you are removing the valvecover for valve adjustments on a consistent basis...is
there a scheduled chain stretch observation in the MBZ's service program?...or
do you just open her up every so often to check the slack?....i've read a
hundred opinions on this...but, obviously want to know the downside,should the
chain actually be getting ready to go....my wife's 84 toyota has 326,000 on it
& the chain is fine....but that motor is cheap vs the 5995.00 less online discount i just found for a rebuilt 603......

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MBnewB

1987 300 SDL 190,000 bought @165,000
1999 Subaru SUS Limited ED. 50,000
1984 Toyota Celica GT 323,000 all original,but oil,tires & brakes...runs great!
1963 WILLYS J200 4x4 Pickup 179,000
1942 WILLYS MB (Military Jeep) 42K