Dear all

Had diesel leak from Cylinder #5 300SDL,

found burned oil in pre chamber, and on the injector,

about to check compression,

getting new pre chamber and seals tomorrow,

will keep posting,

thanks any which way,

Attached Thumbnails

 

I'd suspect that the heat shield washer was missing, installed incorrectly, or reused from a previous installation OR the injector was loose to cause that kind of buildup. Clean out the carbon, install a new heat shield washer, and see if you still have leaks.

__________________
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!)

Did change the hard line tube+ colar nut,

it stop leaking diesel, for now,

heat shield washer was new,

new nazel, tested,adjasted to 2000psi pop,

all torque to specs,

still nock at ideal,

DV check next,

or oil passage is not full open????

thanks for the response ,

320 PSI on the compression test isn't spectacular, but it won't cause that kind of buildup in the prechamber opening. That came from the heat shield washer not being seated or something leaking down from above. There isn't any oil passageway involved with the prechambers.

__________________
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!)

I might be wrong seeing the black residue as burnt oil,

could be bund diesel, sipping out,

thanks for replying ,

will check in coming days the compression of the rest of the cylinders ,

110,000 miles ago it was around 500 psi,

will check and report,

I was looking for oil passage to the valves,(new hydraulic tappets)

nock only in idle, bit more rpm, nock is gone,

or poor diesel delivery, at idle,

Look up videos on Youtube of diesel injectors "nailing" and see if that's what you have going on. If you have new tappets and the oil pressure is ok, you're probably nailing which is fairly common. Take the oil filler cap off and look down in the valve cover. If oil is flinging around everywhere off the cam, you have oil pressure to the top end.

__________________
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!)

Thanks for kind reply,

oil pressure is ok,

oil sprinkle when oil filler cap is off,

when cracking off #5 cylinder , nailing or nocking is off,

only at idle,

If you had problems with the valve train or tappets, the noise wouldn't stop when you crack the injector line. Your low compression in that cylinder CAN cause nailing though, especially if the rest of the cylinders are relatively high in comparison.

__________________
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!)

got the seals for DV,

will change them in two three days,

will inform,

thanks

That is what I am concern,

will gather the facts,

thanks