Hello:

I have a 91 300e 2.6 w/o air pump. It has a belt in fair condition belt but I am looking to replace it when I replace the tensioner . I cannot find any listing for the correct size as all US models have an air pump.

My old factory trained MB mechanic friend said the air pump only injected air to lean out the exhaust during warm up. The state I live in has no EPA regs so I not concerned with finding and installing a pump.

The old belt has a number but it seems very tight . Ideas?

Of course my car will only be used off road for purposes of testing and evaluation.

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92 300e 205 k miles decent -wife's ride
91 300 TE many upgrades and very clean-Junk yard rescue ( son's "hot rod")
68 250 s Low rust great shape
91 300e 236k ( rear ended and sheared metal subframe mounts /sway bar )
85 300TD 310k

Below have moved on
77 300d 36k miles one elderly owner! Now in Ca fully restored
79 300 sd 49k miles( time capsule clean )sold and still in ohio
66 230s new at factory "das boot" gone.
93 190e 2.6 crunched-hard no injuries
69 220d rusted away

This should do:

6PK2365

I've got the air-pump off on my m103 as well. From what I recall that belt fits well. I picked up a Dayco TopCog I think..


http://www.peachparts.com/shopforum/551397-post5.html

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Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

Thanks for the info. The air pumps are expensive (even used) and they are just a US tack on. The car runs well (even cold) and passed emissions when Ohio had EPA testing.

__________________
92 300e 205 k miles decent -wife's ride
91 300 TE many upgrades and very clean-Junk yard rescue ( son's "hot rod")
68 250 s Low rust great shape
91 300e 236k ( rear ended and sheared metal subframe mounts /sway bar )
85 300TD 310k

Below have moved on
77 300d 36k miles one elderly owner! Now in Ca fully restored
79 300 sd 49k miles( time capsule clean )sold and still in ohio
66 230s new at factory "das boot" gone.
93 190e 2.6 crunched-hard no injuries
69 220d rusted away

I've been trying to pinpoint a noise that sounds like an exhaust leak at startup on my m103 2.6 190e. It only happens at startup and lasts about 10 seconds. Is that the air pump?

Not just US - my 300ce has the air pump and was originally supplied to Monaco. Many European vehicles had this.

I'd rather like to remove it as it is just another thing to go wrong and it makes a noise for the 20-ish seconds that it works.

All the best.

RayH