I buy 90% of my parts from Fastlane/Phil. But I looked around at the usual sites and could only find them in the $300-$350 range. I prefer to go oe when the price is about the same.

The dealer is not always more money.

For example I got a my floor mats from the dealer for $25 less then Adsitco had them listed for.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

As mentioned earlier in the thread, I have noticed the price on these pumps have moved around quite a bit this last year.

When I first priced one last year it was $250, when I bought mine it was just over $300, and the last time I looked it was closer to $350.......

Glad I spotted this thread. I'm into this general area of the engine pretty well already - doing the belt tensioner lever, pulley and shock. So with everything off in front I took a close look at the vacuum pump. Definitely the original style, and probably the original pump at 371k miles. So I think that I'll take care of this task now. Aw, what the heck, I'll take the valve cover off too and check the timing chain stretch.

But it has to stop there. No more. No. Stop work. End.

Ken300D

P.S. Any thoughts on Pierburg vs Hella brand?

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1982 300D at 351K miles
1984 300SD at 217K miles
1987 300D at 370K miles

I decided on the Pierburg for no good reason except that's what was shown in the picture earlier in this thread.

Does this vacuum pump (exposed bearings) issue persist into the later 602 engines in the 1990-93 300D models? My brother has a 92 and I want to warn him if he has this situation.

Ken300D

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1982 300D at 351K miles
1984 300SD at 217K miles
1987 300D at 370K miles

The same pump is used on all OM601/602/603 engines from 1984 through 1993, as well as the OM606 used from 1996-99. Pierburg is the only manufacturer of the pumps. If anyone has seen a brand other than Pierburg, let me know! BTW, here's a photo of the two different types of gaskets:

i just checked my vac pump on my 87 300dtd.it has the 4 screws on the cover.is this a for sure identification of the later style pump

Yes, this is the later style pump, for sure (thanks Dave!).

Hatty, You need to quit finding things for me to fix. But thanks, to you I just walked out and looked to see if I've got the new or the old. I have the old pump. I'll get it changed out as soon as possilbe.

Where is a good place to get a new vacuum pump online?

Anyone know of a good online parts store that you can get a good Vacuum Pump? I know that Fastlane has it, but was just checking to see what other sites, may be offereing

Tom, do a search. Someone posted recently regarding a pump at a considerable savings when Hattie had to do his pump.

Edit: Tom, this is the thread. Check out the postings above.

Hey, whoa, hold the phone a second. Are you saying my 99 might have an open bearing pump?

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References

Woops - no. I meant the replacement pump is the same. The originals should have been "fixed" somewhere in the mid-90's, I think? I'd sure hope by 98/99 the pumps were coming with the four Torx-head screws in the front cover. AFAIK, if the cover has the four screws, it's a closed-bearing pump.

On a side note, I bought a used one off eBay for pretty cheap, then discovered the bearing surface (part that would ride on the IP cam) looked like the surface was coming off in some sections. I was pretty ticked... I need to take some macro photos and post here, since this *is* the vac pump thread, for some outside opinions. If nothing else it should be useable to keep dirt out of a parts-car engine, although I don't think I'd want to use it on-road for any length of time.

Thanks Brian, I think i've found a Vacuum pump for over $250. I'm going to get it and install it next week. While changing out the vacuum pump is there any other items that can be checked on and or possibly replaced while i'm there?

Well, Tom, you need to pull the belt, obviously. So, it that has a few miles on it............

Same deal with the tensioner. You can feel the bearing in the tensioner with the belt off of it. If it spins with no resistance and has any roughness to it, it is getting to be time...............

What Brian said also spin all of the pulleys and check them for play. Everything was tight on mine at 240k so yours should be fine.

Brian thanks for reminding me, my tensioner is due soon. I am on my second belt, maybe this spring I will swap it out.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200