06-04-2012, 04:30 AM
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Registered User
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Join Date: Jan 2012
Location: Leiden, Netherlands
Posts: 614
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Quote:
Originally Posted by junkscouts
My question is how does the 220D tensioner work? The manual from the 190D says the tensioner functions from oil pressure and you have to bleed it, but the 220D tensioner doesn’t appear to use oil as far as I can tell by looking at it. I realize now I should change the tensioner anyway, but is it just a spring in the tensioner or is there oil in there? It seams very slack right now, I can easily push the tensioner back in with my finger and it is not keeping the chain tight at all when I turn the motor over by hand. Needless to say I won’t try and start it until I get that chain tight, but any help would be appreciated.
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The tensioner has a spring in it and it is fed oil from the oil circuit. The inlet hole is larger than the outlet hole, so oil is kept under pressure in the tensioner. You fill the tensioner before installing (as described above), but after that, it is kept full of oil and free of air by means of the oil pump. It works indeed slightly differently from the OM621 version.
Quote:
Originally Posted by junkscouts
Also I was wondering about the injection pump timing. There didn’t seem to be any marks for lining up the sprocket (and nothing in the 190 manual) and the old chain was completely off so I just put the new chain on lining up the crank and cam marks, but now I am wondering if I will have to pull the pump to get the timing right? If that’s the case can someone give me a quick description of how to do that? ie lining things up, I can remove the pump easy enough.
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Since the head has been off, it is best to take off the injection pump. Put the engine on 24 degrees before TDC in the compression stroke, line up the marks on the injection pump and install the pump. After that the pump needs to be fine-tuned by means of the drip tube. That is described in the service manual of the OM621. Copper washer (#5) has to be replaced (one-use only). This is a special washer, a generic one cannot be used.
Quote:
Originally Posted by junkscouts
My last question is where on the block are the numbers stamped? When I looked up the new tensioner it wants to know “Engine Range: From 10-166609” so I’m wondering where I find those numbers?
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The engine number is just below the text "engine number" in the picture below.
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