My Brother's made it past 250,000 miles before cracking, don't be foolish .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

There are plenty around with way more than that. I'm sneaking up on 200K (at least according to the odometer) in mine, and I'll guarantee I'm not losing a single wink of sleep over it.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

What’s the condition of the lifter bore? Does the lifter body spin easily and move smoothly through its vertical travel? Whats the condition of the cam lobe? Did the loose valve face deform the prechamber tip? Did the loose valve face score the cylinder bore? Did the loose valve face bend or twist the rod?

Sixto
98 E320s sedan and wagon
02 C320 wagon

"I'm not losing a single wink of sleep over it. "

~ Excellent .

Hopefully it'll last the full life of the engine .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

Hello Sixto, The lifter bore looks good. What happened is the part that retains the ball inside the lifter came out cracking the #2 exhaust valve. I would estimate that I lost about 10% of the corner of the valve itself. This is what lead to the zero compression condition. The lifter was found completely flat, compressed the top of the valve. The cam looks like it is in good shape. The cylinder bore looks good as well. The top of the piston and head looks burned and has some damage. I will be removing the valves in the #2 position later this week.


I guess my biggest concern is what would result in using the piston and head in its current condition? Would this result in localized hotspots that will lead to catastrophic failure.


At the end of the day this isn't a NASA space project and the a replacement -XX head would be bit more costly than I would like. My gut feeling is to replace the head and #2 piston but the reality is that this will exceed the value of the car. I was t-boned on the expressway so this car already has a salvage title. I have already straightened the door frame, replaced the door and fender.


Let me know what you think.

__________________
1989 560SL
1986 300SDL
1983 300D (Burning Jet-A)
1982 240D
1995 S600

Since the issue of value of the car is now in play, what does the piston and bore look like? If they're anything like that head, you'd be better off considering scrapping the car, or if you want to keep it going - source a used engine. A new head with machine work will set you back about the same as a decent used engine will, on a cylinder that's been beat up that badly it's kind of a crapshoot what's going on down below. Pistons for the turbo 603 are EXPENSIVE. Unless you're overhauling a concours quality vehicle, it isn't really worth it on a daily driver.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Replace the valve, clean up the head and put it back in. I bet my top dollar that it would run good. The Piston and head is beaten up because of the broken valve jumping around. No point spending any money on head or Piston.

__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

I would want a look at the deformation on the underside of a piston that took such a whipping. I'v seen pistons that had cracks on the underside that weren't hit that hard.

All it takes it removing the lower pan. 20-30 bucks for a gasket.

__________________
84 300SD
85 380SE
83 528e
95 318ic

You’ll probably have enough compression to run well even with the banged up valve seats. Hopefully the prechamber can still spray a decent pattern. I don’t think hot spots are a problem or even possible with IDI. Heck, they might be a good thing.

My next question is whether the valve guides a compromised from irregular forces on the valves. You might button it up and still have smoke from oil leaking past the valve guides. I’d button it up with a valve and lifter, prechamber if you can get your hands on one, then see where it goes. If it’s not worth keeping, you should get a little more for a running car than a pile of parts.

Sixto
98 E320s sedan and wagon
02 C320 wagon

Update: Replaced both the intake and exhaust valves. I pressed in new valve stem guides, seals, a new head gasket. The car runs awesome and everything seems to been operating as advertised. I appreciate everyone input on this.

__________________
1989 560SL
1986 300SDL
1983 300D (Burning Jet-A)
1982 240D
1995 S600