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  #1  
Old 02-05-2003, 05:14 PM
That Guy's Avatar
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Air Pump for w201? ('91 190E 2.6)

Was wondering if anyone had experience with problems on the 190E 2.6 Air Pump. The pulley attached to mine seems to have unaligned itself making the belt smoke and awful noises. It was running but (next day) when I got a tow it started and died. Won't start now.

It doesn't appear that the main bearing of the pump is unaligned but rather that the pully is coming apart from itself. Is it possible that I only need to replace the pulley?? If you're familiar with this issue, you know I'm not looking forward to replacing the $1000 pump.

Any and all help/info would be appreciated.
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  #2  
Old 02-05-2003, 06:20 PM
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The pulley and clutch assembly is easily replaced if that's all that is bad. You should see if the inner part of the clutch (the part the pulley turns when the clutch is applied) is spinning freely. If it isn't, then a seized pump is what ruined the pulley and clutch assembly. If it spins freely, then the clutch bearing is what failed, and the pulley and clutch assembly should be replaced.

Gilly
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  #3  
Old 02-06-2003, 01:02 AM
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My bearing was screaming on my 190E 2.6 on the air pump about three weeks ago I removed the air pump which was simple and used a shorter belt a 3280mm in length was perfect after 4 tries. The pump only is engaged for a few seconds when the engine is cold. My car has 230,000 miles on it. I haven't had any problems since.
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  #4  
Old 02-06-2003, 07:46 AM
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You mean a belt for a pre-air pump car? The one that lets you bypass the air pump altogether? That'd work if there is no emissions testing in your area. may be illegal if if there isn't, but then again, so is speeding .

Gilly
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  #5  
Old 02-07-2003, 03:03 PM
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I just did air pump job by myself.

My car is W124 400E, my problem was pulley itself, the bearing was completely broken, the pulley was dangling and shaking, it generated a lot of heat and a loud noise, it even toasted the air pump clutch coil.

I ordered a new pulley from internet, I believe it's also available in Fastlane, it cost me 220 USD, the part is acutally a combo which consists of clutch and pulley, it's Mercedes OEM part.

I then losed drive belt, removed two hex bolts, disconnected hoses and removed air pump. Changing pulley and clutch was a piece of cake. I even took apart the whole air pump and gave it a good clean, the whole work took me 4 hours.

After sitting in garage for 2 weeks for parts, my 400E is on road again, thanks to my reliable Ford Explorer!
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  #6  
Old 02-07-2003, 03:42 PM
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You're kidding me!!!!

I may not even need to replace it? Just get a shorter belt? Unbelievable!
The thing has a list replacement price of $1010! Luckily my friend has some "other channels" (used to be a mechanic) that got me one for $400 (minus core charge). Virginia requires emmissions so it probably is in my best interest to get it anyhow, but I also wouldn't mind saving $400 and get my car back on the road rather than waiting for the part to come in. Any additional insight would be appreciated.
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  #7  
Old 02-26-2003, 08:52 PM
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Help!

Well, so far, this has NOT worked out so well.

No offense JDUB (I know your heart is in the right place), but 3280mm is NOT the right length for using the belt without the air pump.

I've tried 4 belts so far and still have not found the right one! The belts all have numbers written on them that I bleieve also includes the length (i.e. 6KP2425).

The 6KP2325 belt is too small while the 6KP2345 is too long so I need a 6KP2335 but have been unable to locate one. Anyone have any ideas? I'm open too all suggestions.

ALSO, the tensioner pulley doesn't seem to want to release. Is there a special tool for this????? Is there a technique for this? Is it frozen (if so how would I tell).

My brother wants his car back, understandably. And everyday I come home and see my benzo sitting there idle it depresses me. It feels like I'm getting close but still Oh So Far Away.

Any and all help would be appreciated (even words of encouragement would be good to hear at this point).
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  #8  
Old 02-26-2003, 11:46 PM
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All you need is the belt for the earlier motor, before they put the air pump on. I'll see if I can get the part number and length for you. There is a 19mm bolt that holds the tightener center section, it can be kind of tight.

Gilly
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  #9  
Old 02-27-2003, 01:11 PM
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That's what I was thinking but...

.....according to the Fastlane parts catalog on this site, the '89 190E 2.6 also had an air pump (or at least one is listed for it).

The belt for the 89 and the 91 are different though so I'm kind of confused.
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  #10  
Old 02-27-2003, 10:23 PM
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After doing some research, here's my opinion on this:
The original belt on a 103 with air pump should be 2415mm. Without air pump it should be 2257mm. The correct part number at fastlane is either the W1000-21017 (Conti) or the W1000-99033 (the other one). No idea why you are coming up with 2335mm. Maybe it's due to the problem you are having with the tightener.
On the research I did on the air pump question in general, it appears 1990 was the first year, as there is no reference to the air pump wiring existing until 1990. I think the problem you are having with fastlane is because the 89 is lumped into the same year range as a 1990, which does have the pump.
I am really pretty sure the numbers I gave will work. It seems to me when I was contemplating doing this on a car that it looked like the air pump can stay bolted up too, if you don't want to remove it. The belt will miss the air pump pulley entirely. That's how I recall it anyways.

Gilly
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  #11  
Old 06-10-2017, 05:57 AM
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Resurrection

Quote:
Originally Posted by Gilly View Post
After doing some research, here's my opinion on this:
The original belt on a 103 with air pump should be 2415mm. Without air pump it should be 2257mm. The correct part number at fastlane is either the W1000-21017 (Conti) or the W1000-99033 (the other one). No idea why you are coming up with 2335mm. Maybe it's due to the problem you are having with the tightener.
On the research I did on the air pump question in general, it appears 1990 was the first year, as there is no reference to the air pump wiring existing until 1990. I think the problem you are having with fastlane is because the 89 is lumped into the same year range as a 1990, which does have the pump.
I am really pretty sure the numbers I gave will work. It seems to me when I was contemplating doing this on a car that it looked like the air pump can stay bolted up too, if you don't want to remove it. The belt will miss the air pump pulley entirely. That's how I recall it anyways.

Gilly
Just had this problem and went and bought the belt for the 89 2.6 which is shorter. Removed pump and placed new belt on and the belt is maybe an inch too long. The problem why you can't just removed the pump and buy a belt for the engine without the pump is because you also need the alternator bracket replaced which will reposition the alternator up and over some which will make the belt fit.
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  #12  
Old 06-13-2017, 05:28 AM
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Quote:
Originally Posted by lsmalley View Post
Just had this problem and went and bought the belt for the 89 2.6 which is shorter. Removed pump and placed new belt on and the belt is maybe an inch too long. The problem why you can't just removed the pump and buy a belt for the engine without the pump is because you also need the alternator bracket replaced which will reposition the alternator up and over some which will make the belt fit.
The idler pulley is also located slightly different IIRC and it's also a different size on the non-air pump cars. If you change the alternator bracket, you also have to change the fan pulley bracket for the early version as well.

I'm having to figure out the belt size for my engine as it's an 89 3.0L with a 95 E320 AC compressor and tensioner on it. What my friend recommends to estimate the belt length is to wrap thread around the the pulleys then measure. Go to the autoparts store, grab a couple of lengths at or smaller than that and see which fits best, take the others back.
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1983 300D manual 100K chassis- Dad's
1990 Lexus LS400 189k- Brother's
1991 190E 2.3-190D (87, 320K mile) conversion project- Mine
1993 190E 2.6 Sportline Limited Edition 207K-Mine
1993 190E 2.6 Sportline Limited Edition 91K-Mine
2003 Sprinter 2500 Passenger 205K-Dad's
1996 Mercury Grand Marquis LS 240K- Head gasket failure
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