1992 300D 2.5 vacuum pump "FAILURE" ball bearings fell into timing chain - Page 2 - PeachParts Mercedes-Benz Forum

gsxr · #1 09-07-2012, 10:45 AM

Quote:

Originally Posted by Zulfiqar

where should one look at for this stamp?

Front side of the pump, on the lower portion. It is difficult to read with the pump on the car, and may be hidden behind years of dirt/grease/crud that must be cleaned off first.

carmel · #2 03-15-2013, 09:18 PM

I'm looking for a 1993 300D 2.5 turbo conversion kit for the turbo to change from electronic control to pressure control like the 603x 1987
Dave wheeler
Boise ID
435 817 5555

gsxr · #3 03-15-2013, 09:38 PM

Quote:

Originally Posted by carmel

I'm looking for a 1993 300D 2.5 turbo conversion kit for the turbo to change from electronic control to pressure control like the 603x 1987
Dave wheeler
Boise ID
435 817 5555

Dave, the info you seek is in this thread... you'll need to read quite a bit:
Wastegate actuator swap for OM602.962?

A partial summary is posted here:
Wastegate actuator swap for OM602.962 - revisited

zu! · #4 09-07-2012, 10:30 AM

Quote:

Originally Posted by DieselPaul

Well according to service records it sounded like my 300D had vacuum issues for about 50,000 miles before I got it.

I pulled my vacuum pump to replace my injection pump and realized my open bearings were a little lonely. Opened up my oil drain plug, got a big magnet drug it around the bottom of the oil pan and...

I put in an updated pump around 180,000 miles, but I think the old pump fell apart around 130-140k.

Wow! So you were driving around with all those little balls in the oil pan for over 50 k!!

Nothing happened? No big bang, rattle or something?

torsionbar · #5 09-30-2012, 02:51 PM

Quote:

Originally Posted by zu!

Wow! So you were driving around with all those little balls in the oil pan for over 50 k!!

Nothing happened? No big bang, rattle or something?

foreign objects in oil pan are not a big deal, so long as they are larger than the holes in the pickup screen, and so long as there's not enough of them to restrict flow into the pump. i once found a complete mouse skeleton in vw beetle engine, looked to have been in there for years. car ran fine.

Quote:

Originally Posted by 04 Diesel

No Im not a gambling man, just have no money. But I guess I should be looking for one.

don't be penny wise and dollar foolish. a new pump is a few hundred bucks. a new engine is a few thousand, plus the inconvenience of suddenly having no car and a massive repair bill.

which one of these is the more affordable option? with 270k on the odo, you *will* be selecting one of these in the near future....

300D85 · #6 10-05-2012, 01:14 PM

Quote:

Originally Posted by torsionbar

foreign objects in oil pan are not a big deal, so long as they are larger than the holes in the pickup screen, and so long as there's not enough of them to restrict flow into the pump. i once found a complete mouse skeleton in vw beetle engine, looked to have been in there for years. car ran fine.

read some threads where the balls have worked their way thru the screen

pawoSD · #7 09-07-2012, 12:57 PM

Failure seems to be random, I wonder if it has to do with how hard the pump is worked....like a lot of braking/city driving or vacuum usage/leaks vs. all freeway with a non-leaking system. My 601 has 232k and the pump I removed "seems" to be in perfect shape....but who knows...it was an original from '84. I much prefer having the new one with closed bearings installed!