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DIY 05 C230 Vacuum Pump replacement

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Old 03-26-2012, 02:02 AM   #26
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Glad its fixed!
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Old 04-25-2012, 11:10 AM   #27
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I have a 2004 C230 Kompressor and after my last visit at the dealership my advisor told me something about the vaccum pump in the back on my engine is leaking, i am sure he was talking about this since there should be only one. He gave me an estimate for 500 bux which is ridiculous obviously after seeing this thread. Anyways even though this thread is for an 05, i could possible use this to replace my vacuum pump on my 2004 right???

Very helpful! Thanks!
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Old 04-25-2012, 12:13 PM   #28
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It should fit. The only difference afaik is the gasket that holds the pump against the engine. There's a newer part but I just bought the old version. Buy all 3 gaskets, and replace for about $20 total. Your pump is probably still good.
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Old 05-17-2012, 10:35 AM   #29
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Quote:
Originally Posted by slammer111 View Post
I'm not sure if you're mixing up 2 problems with these engines. There are 2 known issues.

a) Vacuum (hose) leak - causes engine to stutter. Search this forum for "$12 hose replacement". (I started the thread )

b) Vacuum pump leak - car runs fine, but engine oil drips all over the back of the engine and transmission. I'm in the process of getting this one fixed. Waiting for parts to arrive.
Stutter when in gear at idle, at a red light? Thats what my c240 is doing. Is it my hose I just need to fix?
Thanks!
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Old 05-17-2012, 10:38 AM   #30
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Not 100% sure if that's the hose but that just is definitely not the pump. The hose never failed on me but my understanding is that it causes a stutter at idle. Good luck.
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Old 06-10-2012, 08:02 PM   #31
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This is a must do for everyone. Leaking is very bad. I just pulled mine out today and replaced it with a new unit.

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Old 06-23-2012, 12:09 PM   #32
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Finished after three tries

I do not have much experience fixing my own car (it's been about 15 years since I changed an alternator in an Audi). Had to go out and buy a few sets of tools. My biggest problem was the ratchets would not fit in that tight space between the engine and the carpet-like stuff. Bought the torx E10, and a really flat ratchet. I ended up going simple and using an 8mm wrench, and that worked.

The plug on the pump did not come off very easily. Whomever had taken it off before jacked it up, and it the plastic part is broken. I am unsure what that part is called, but I would like to replace it.
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Old 08-12-2012, 11:42 PM   #33
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Not too difficult

Well, after waiting for the seals/gaskets to arrive in the mail, I decided to give this DIY a try this afternoon. I must admit I was a little intimidated. To help calm my fears, I spent the last week reading other's posts on this fix and filling in a few gaps in my tool box. I felt comfortable I had everything needed and more (got my eyes on some other DIY threads), so I set out to replace the seals....hoping I can get away with a less expensive fix....for I replaced my pump less than two years ago.

Like some other people have mentioned, once I found the bolts and addressed which angles to use to get proper leverage, I managed to remove the unit without much effort. Was clearance tight...you bet but patience is the key.

Once removed, I cleaned the exterior of the pump, carefully removed the five torx screws and cleaned the inside of the pump, which was filled with oil. Was the interior seal the issue....I'm not sure but I can tell you the seal was a powder blue color and compressed to the point where it appeared to be the issue. Time will well. I replaced it with the ProLine oil filter gasket suggested and put everything back together.

Total time to complete the job was about 50 minutes. Total cost: $22.79

Gasket #1 - $5.10 (mymercedesparts.com)
Gasket #2 - 1.00 (mymercedesparts.com)
ProLine Gasket #3 - 8.99 (Pep Boys)
Shipping: $7.70

For the record, I am a mechanically inclined person but in the past considered my Mercedes off limits to DIY type work even though I had nothing to base that on. The stealership and the posts here have helped me challenge that prior thinking. Recently, I fixed a broken interior handle and now this oil leak. Next on the agenda is the $12 hose replacement (next weekend). Thanks to the thread starter/community for sharing.
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Old 10-14-2012, 03:50 PM   #34
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update: the dealership does sell the large o ring now

just had mine fixed dont know if it stopped the oil leaking but the brakes feel like new now
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Old 10-14-2012, 05:46 PM   #35
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^ Can someone post the part # for the 3rd O-ring?
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Old 10-14-2012, 07:00 PM   #36
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^ Can someone post the part # for the 3rd O-ring?
i gotta go to the car to the c part number..pm me if i dont get back to u
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Old 10-14-2012, 07:59 PM   #37
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2712380180
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Old 12-12-2012, 01:59 AM   #38
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2712380180
This the pn for the gasket that seals the pump to the block correct? Could you post the pn for the oem large o ring?
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Old 01-02-2013, 06:11 PM   #39
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can anybody post the pn for the OEM large o ring?
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Old 02-21-2013, 02:14 AM   #40
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Does anyone know if these 2 parts are interchangeable?

271-238-00-80
271-238-01-80

Looks like the 00 I replaced is leaking again. Thinking of trying the 01, on the same old pump.
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Old 06-03-2013, 01:47 PM   #41
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Thank you for this. It was driving me crazy looking for this leak.
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Old 06-21-2013, 06:57 PM   #42
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First I want to thank everyone involved in this write up.
I rebuilt mine today veryeasy and quick job ( if it goes again I will get a pump ).
The issues I had were the car would get a low vibration / rumble with the A/C on
and the car in gear, it would disapear in park or with the A/C off.
I first thought the A/C compressor might be going bad but found this thread and
thought I would try this ( the cheapest / quickest ) fix.
After the rebuild I started the car and thought it was still the same, however after driving it home the low rumble noise was almost completely gone.
My guess is there is still some oil blockage in the airways making not go away instantly.
I hope this helps someone as much as it has helped me.
Thank You
Anyways heres some oily pics I took with the pump out and apart.





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Old 06-21-2013, 11:32 PM   #43
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Could you post the part #'s for the new seals/gaskets? Thanks!
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Old 06-22-2013, 12:18 AM   #44
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Here you go pump to camshaft housing# 271 238 01 80 and pump gasket# 6689970145.
I got these through autohausAZ and came out to $11.28 with shipping.
I purchased the Hyudai oil filter that came with the large o-ring but it didnt fit
so I reused the old one which appeared to be in good shape.
Also on a side note the large o-ring is not on the oil side and has nothing to do with
oil in the pump.
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Old 06-22-2013, 11:10 PM   #45
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Well there is still some noise when at idle, which could be some oil left in the system
or it just needs A new pump all together. I did order the replacment hose kit which can also cause idle issues. I will pull the pump ou next week nd check for oil and go from there.
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Old 10-28-2013, 12:47 PM   #46
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Vacuum pump repair

Thanks for the write up. I completed this job this weekend and found that an 8mm box wrench worked best for me, as a there was not enough clearance for socket and ratchet.
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Old 11-09-2013, 02:12 AM   #47
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This is really helpful - I have a vacuum pump leak on my 2004 c230.
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Old 11-12-2013, 05:47 PM   #48
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thank you....
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Old 11-19-2013, 03:12 AM   #49
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I'll be rebuilding the old vacuum pump this weekend if I can get the parts together by then.

Two questions, is oil supposed to be inside the vacuum pump? Is this how we know it's "leaking"? And finally, is there a way to know the leak has been fixed without physically inspecting the pump? I only know about this leak from having a mechanic check it out so I wouldn't know what to look for.
Thx,
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Old 11-19-2013, 03:56 AM   #50
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^ Yes, the engine oil is the medium that you're pumping. Therefore this is normal.

The way to test for the leak is very easy. Take a rag or paper towel and wipe the engine where the pump is attached. If there's any oil at all, you have a leak.
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