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Old 05-21-2011, 05:05 PM   #21 (permalink)
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Date registered: Feb 2011
Vehicle: 1991 124 chassis 300D 2.5 TurboDiesel 325K miles
Location: Central Illinois (head gasket work) & coastal North Carolina
Posts: 180
Zeitgeist brought to my attention these washer are in the head gasket kit. Thanks!
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Old 05-21-2011, 07:28 PM   #22 (permalink)
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Date registered: May 2004
Vehicle: '90 124.128
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Black "Plastico" Injector Dust Shields

I haven't been able to find them, anywhere.
Mercedes stopped using/offering them Years ago.

Those Two Coolant outlet pipes on your "New" Head use a rubber O-Ring each to Seal between the Coolant pipes (on the front lower Passenger Side) (And on the Fuel Pre-heater Exchanger)
'same part number for both applications. #012 997 51 48

Please let us know how the "New" Head performs (Updates on it.)
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Last edited by compress ignite; 05-21-2011 at 07:31 PM.
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Old 05-21-2011, 08:07 PM   #23 (permalink)
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Good to know they are the same part number, the seals, I will install two new ones.

Black Plastico Injector Dust Shields- nice to know the name, that may help in the hunt. Took me forever to clean that area before removing injectors, they serve a good purpose.

Will do on the cylinder head performance reports.
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Old 05-21-2011, 08:26 PM   #24 (permalink)
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The O-rings fit into the Unshown Sides of the two fittings

You still need the metal seals the "Z" told you about for the "fittings to head" interface.

And Black "Plastico" is just my terminology (I've no idea what Mercedes calls them.)
[Save your self some time,unless you can get the "Factory" in Stuttgart to tell you who
made the plastic dust shields (AND they,whomever they are, have some left-over in a dark corner) you're out of luck.]
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Last edited by compress ignite; 05-21-2011 at 08:30 PM.
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Old 05-23-2011, 11:16 AM   #25 (permalink)
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remnants of "Black Plasticos"

Compress Ignite,

Here's a photo of the best remaining dust cover I had, not well designed with heat in mind. I wish they were upgraded and still around, that open area was packed with grime.

I'm thinking of trying a hardening commercial furnace firebrick caulking, something that will withstand the heat, and form a seal, like an O-ring, which I can pry loose with a pick.
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Old 05-24-2011, 02:54 PM   #26 (permalink)
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I'd not try anything like that

The OM617.XXX series 5 cyl Diesels (Predecessor to the OM 602 + 603) had no such Plastic
dust cover and worked just fine for many.many Millions of miles.

I'd just blow out the Injector Recesses gently with C.A. (Compressed Air) if I couldn't stand
the dust buildup.
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Old 05-25-2011, 09:36 AM   #27 (permalink)
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Date registered: Feb 2011
Vehicle: 1991 124 chassis 300D 2.5 TurboDiesel 325K miles
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Posts: 180
Shes' coming along nicely

Repaired cylinder head in place, new timing system components. With re-assembly, I feel like I'm over the hump toward running again.

This is my first time with timing a Diesel, and replacing all timing components. Getting the timing right was quite involved, next time will be much easier I'm sure. I've been triple+ checking my work.

Getting the timing case cover on and off without damaging the pan and cylinder head seals is far more difficult than I imagined. Dropped the pan back down to help.
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Old 05-26-2011, 05:11 PM   #28 (permalink)
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There is no reason to put anything into the cavity around the injector, you're only making work for yourself.

Also, what casting revision is the head? The 602 heads had the same cracking issues between the combustion chamber and the water jacket as the 603 heads, right where yours cracked, and I'm interested in which head casting yours is.
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Old 05-26-2011, 05:23 PM   #29 (permalink)
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Hi Jeff;

Head Stamp: T R 602 016 08 01 B1 1

Crankcase Stamp: 602 962 12 008813

I'll take your advice on the injectors, I need no more work right now. Let me know your thoughts on the cylinder cracks.

Wade.
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Old 05-29-2011, 06:01 PM   #30 (permalink)
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Amost there

Getting close. She'll crank tonight after a block/heater cooling passages flush. Don't want flotsam in new radiator.

Now if I could only find where the brown vacuum line hooks. I have pictures of everything except that. I looked online for vacuum systems in the FSM, but found none. Is it hidden somewhere?
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