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Name that part ..... 700 1986

posted by  someone claiming to be Cal on  Thu Aug 12 02:48 CST 2004 [RELATED]

I’m trying to find out what this part is on my 1986 740T with B230 engine.
The part sits to the left of the engine front. It has two turbo hoses coming
to it, and a smaller hose from the top of it going across valve cover down to
breather box. What is its function, and how can I tell if it’s working as
properly ?

Thanks !







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Name that part ..... 700 1986

posted by  darius on  Thu Aug 12 16:30 CST 2004
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last visit: Sat Sep 20 19:24 CST 2014
[RELATED]

It may be the Compressor Bypass Valve you are referring to if it is on top of the turbocharger. The smaller of the two hoses going over the valve cover goes to it, and the larger hose goes to the Air Mass Meter - Turbocharger hose. See the FAQ on turbo stuff - there is a lot there.
--
Darius in Albany NY '86 744 GLE (175K, given to my mother-in-law); '91 745 Turbo (173K-my 'Little Red Wagon')








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Name that part ..... 700 1986

posted by  Garyh on  Thu Aug 12 08:30 CST 2004
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last visit: Sun Apr 15 11:44 CST 2012
[RELATED]

Sounds like your talking about the air mass meter (affectionately AMM). It measure and compensates for density and is a fairly expensive part.

Gary







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