Removing Smog Pump - trying to identify part where the hose connected to the block - Mercedes-Benz Forum
 
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post #1 of 4 (permalink) Old 05-19-2019, 07:24 PM Thread Starter
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Removing Smog Pump - trying to identify part where the hose connected to the block

I spent today remove the under-hood catalytic converters and smog pump.

Having removed the smog pump, there's a small 'plate' just in front of the right hand exhaust manifold that is attached with 3 Allen (hex socket) bolts. This has the pipe to the (now gone) air pump on it, and also some kind of breather (?) - a very short cast metal pipe. I'm trying to find out if I can remove it (and if perhaps there's a blank plate to replace it).

There is a part number on it, but I can't find it in the EPC - but I think that's because I'm not reading the number correct.- it's a pretty rough casting.

Photo below shows the part (it is upside down though, so you can read the #) - I think it is A1170520251, but I've tried various variations on that.

Any one else who removed their smog pump - did you remove this as well? Did you find a replacement 'blank'?

-Steve
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'76 450SL 'Yard Find' Project
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post #2 of 4 (permalink) Old 05-20-2019, 03:39 AM
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That is the timing chain tensioner 117 050 10 11. Time to replace anyway. Have you changed the guides and chain? The raised number may be a casting number.
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post #3 of 4 (permalink) Old 05-20-2019, 04:07 AM Thread Starter
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Thanks! Tensioners were on the list for later, but now I see where they are I'll do them before putting this all back together!

Is there a part number for a cap to go over the air pump connector on the tensioner?

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post #4 of 4 (permalink) Old 05-20-2019, 05:30 AM
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EPC does show one.
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