I am pretty sure that my head gasket is bad on my 190D with the 2.0 engine.

I have a chance to get a head from a 2.2.

They look the same, but does anyone know for sure if they are interchangeable?

Have no real knowledge but I would bet they aren't. The 2.0 head would have a smaller expansion chamber because of the lower capacity of the engine. In order to maintain a similar compression ratio the 2.0 head would produce a higher compression in a 2.2 which could be detrimental. Similar to shaving the heads several thousandths.

As a counterpoint, 601/2/3 heads are flat relying on notches in the pistons making up for compression ratio. Witness the 3.0 and 3.5 variants of the 603 sharing cylinder heads. The 2.0 and 2.2 vary only in stroke vs the 3.0 and 3.5 which vary in bore and stroke. You probably won't have problems swapping heads and it's likely they use the same head gasket. The heads can use vertical or inclined prechambers depending on vintage and injector rate might be different as well. Cam profiles might differ but that shouldn't be a problem. You need to check the Euro EPC to compare part numbers and part number progression. The US EPC available within the US at no cost doesn't have much Euro; e.g., 190D 2.0, info.

Sixto
MB-less

I had to drill the last bolt out. The triple square head was completely stripped out. I tried my craftsman bolt extractor and a grabit, but finally I had to drill the head off the bolt away. The bolt surface is pretty good, but the bit went in at a slight angle and cut away a little bit of material right under the bolt head area.

I have attached some photos....

Attached Thumbnails

     

This is for sure. The head gasket is different between engine serial number for the 2.2. So you need to be more cautious.

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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.

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Where did you find the part numbers?

I called Mercedes and gave them the VIN for the car I pulled the 2.2 Head off of:
VIN: WDBDB22CXFF074738

They gave me a part number of:
601 016 2920 and a cost of about $51 for the gasket

According to page #2 on this site:
http://www.sm-original-germany.com/fileadmin/PDF4Download/VM11/Mercedes_Benz_Diesel.pdf

There are about 3 different head gaskets for the 2.0 engine.

I will see if I can track down any more info. I am going to get the head pressure tested and leak tested - if it passes those I will get it cleaned up and ready to go. If I can't use it I will probably just sell it.

I can't say much that will be constructive / specific for the OM601 but I can say that for the M102 (petrol) engine the difference between the 1.8 and 2.0 version is in the head design and the piston design => the cylinder bore is the same.

The 1.8 M102 has ball topped / convex pistons and a head that suits these protrustions. The 2.0 M102 has flat topped pistons and a different shape to the combustion chamber in the head. I've seen pictures of a M102 2.3 engine that has the convex piston design and combustion shape in the head that is similar to the 1.8 design.

So the message is => if the bore diameters are the same - look carefully at the piston design and combustion chamber shapes. Mercedes also made different displacements by fiddling with the unswept volumes and piston shapes rather than just changing bore sizes

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
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1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Head and piston design are irrelevant to displacement... If the displacement increased, either bore or stroke had to change.
Certainly, piston and cylinder head design changes effect power and efficiency...

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Conventional thinker!

Here's the example I gave for the M102 and how Mercedes did it.

The bore and stroke is exactly the same for both the 1.8 and 2.0 M102

Here's the 1.8 pistons and the 1.8 head











And here's the 2.0





Do you see the differences?

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Why have you assumed your 2.0L head is bad? Bad headgasket does not equal bad head. And the 601 heads don't have the (overblown in its own right) "reputation" for cracking that the 603 heads have. Invest $50 in a trip to the machine shop and have them pressure test and measure your 2.0L head.

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DieselPaul,

That is an excellent question. I am only assuming the worst. I do not have definite evidence that the head is bad.

I have actually never done a head gasket replacement before. When I knew that this 2.2 was in the junkyard and I could get the head off of it for less than $100 it seemed like a no-brainer to grab it and have it as a back up. Plus it would give me a good idea of how hard it would be to get the head off of my 2.0. I would learn a lot, and i did.

I also like having a spare just in case.

I am overly concerned about the head because I have a feeling that the PO let the car overheat, based on the description I got. I just have that feeling. In all likelihood it may just be a bad gasket. I need to actually pressure test it which I hope to do this weekend.

I also have a bit of a fear that it may be the rings.

The local benz guy was saying that the water jackets and stuff can move around or change size. People mix them up and things go wrong.