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1995 E320 Cabriolet, 1994 E320 Wagon, 2007 E350 sedan, plus a brace of 124 diesels
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Let me know if you are interested in purchasing one of the later heads, I have one that I pulled from a W140, I don't remember if it is a #17 or a #20 or a #21, and I also think I have the inclined injectors to go with it. I'm down in Charleston SC, would be much easier for a local pick-up than trying to ship this to you.
 

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1995 E320 Cabriolet, 1994 E320 Wagon, 2007 E350 sedan, plus a brace of 124 diesels
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504 Posts
As far as concern about those compression numbers, I would not worry about the block at all, or the rings. Two cylinders that are low together and next to each other generally mean the head gasket or the head has failed between those two. Sure, you can do the leak down test to try to get a more definite diagnosis, but once you pull the head, you can look at the cylinder walls for those two and see if they are scored by broken rings or some other issue.

Pulling the head is not a lot of fun, and the 'while I'm here' temptation is strong to also change out the timing chain rails and the front crankshaft seal, and put in a new timing chain. My wagon is called "the White Whale" because it's white and when I did the head replacement, I installed a bad head first time around, so I found a 2nd head and installed that, and then I had a hydraulic compensator (lifter) that was over-filled and holding an intake valve open, and that took me a bit to puzzle out and fix. I think it took me over a year to get all that done, and I also did all the rails and the front crankshaft seal.
 

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Registered
1995 E320 Cabriolet, 1994 E320 Wagon, 2007 E350 sedan, plus a brace of 124 diesels
Joined
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504 Posts
Let me know if you are interested in purchasing one of the later heads, I have one that I pulled from a W140, I don't remember if it is a #17 or a #20 or a #21, and I also think I have the inclined injectors to go with it. I'm down in Charleston SC, would be much easier for a local pick-up than trying to ship this to you.
Also have the upgraded camshaft to go with this head. Basically you'll need to get it checked by a machine shop for the valve guides and replace the valve stem seals. You can also try to get it checked to make sure it doesn't have cracks, but that is a tough thing to find a shop that can do that work. If you get this head, and then find out it is bad, I'll refund your money if you return the head to me, along with the report from the shop that found it to be cracked or damaged in some other way.
 

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1995 E320 Cabriolet, 1994 E320 Wagon, 2007 E350 sedan, plus a brace of 124 diesels
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504 Posts
Think about getting new INA hydraulic lifters. A few years ago, you could find them for about $12 each. Don't know what the price is now, but you can be assured of a nice quiet valve train. Also install new valve stem seals!
 

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1995 E320 Cabriolet, 1994 E320 Wagon, 2007 E350 sedan, plus a brace of 124 diesels
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504 Posts
Well you need a tool to compress the valve springs and get the keepers off the stem, so you can remove the springs and valves. I fashioned a tool from a deep well socket that had a nice window in the side, and some plate steel and some big c-clamps. Socket pressed down on the top of the valve spring retainer enough so that the keepers came loose and could be removed with a magnet (through the window in the side of the socket), then you can get the valve spring off and you have access to the seals. Make sure you can find a supplier for the seals, I had a hard time getting them about 8 years ago, there are different seals for exhaust and intake.
 
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