Vacuum Check Valve Repair
#1
Thread Starter
Member
Joined: May 2021
Posts: 221
Likes: 63
From: North of Houston, Texas
2013 CL 63, 2002 E 55, 04 Jaguar XJ8, 66 Jaguar XKE
Vacuum Check Valve Repair
I thought I would share my check valve experience.
I was playing around with my car and had the hood open and thought of the issue with waste gate actuators fluttering. I looked down and sure enough just like the videos in the other posts.
So, I took the vacuum port off of the vacuum pump (pretty easy once the hose was out of the way) and inspected the little orange diaphragm
and there was nothing left but the nipple.
Obviously broken. So I started the search for a replacement that did not involve buying the whole vacuum pump. I found some things on Ebay from China and the Ukraine but costs were stupid and shipping was worse. $90 for a little piece of orange rubber!
Anyway, I noticed that this pump system is used on a variety of vehicles including Volvo and Ford. Volvo had a similar looking part but they wanted $70-80 for it. I also saw some references to a small Ford turbo engine so I looked a bit and found something on Amazon that seemed very close. Price was $25, shipping was free and I could send it back if it did not fit or work. So I ordered.
Got it in a day, tried it out and it sort of fit. The nipple seemed a bit too small but the diaphragm itself was perfect. Once you put it in its cage there is nowhere for it to go so I thought I would try it out.
Put it on and started it up...actuators are still as church mouse. I actually think it helped the bottom end a bit.
Anyway, hope it helps with the issue. It had been discussed before but no one ever said where to purchase (that I could see). So try:
I was playing around with my car and had the hood open and thought of the issue with waste gate actuators fluttering. I looked down and sure enough just like the videos in the other posts.
So, I took the vacuum port off of the vacuum pump (pretty easy once the hose was out of the way) and inspected the little orange diaphragm
and there was nothing left but the nipple.
Obviously broken. So I started the search for a replacement that did not involve buying the whole vacuum pump. I found some things on Ebay from China and the Ukraine but costs were stupid and shipping was worse. $90 for a little piece of orange rubber!
Anyway, I noticed that this pump system is used on a variety of vehicles including Volvo and Ford. Volvo had a similar looking part but they wanted $70-80 for it. I also saw some references to a small Ford turbo engine so I looked a bit and found something on Amazon that seemed very close. Price was $25, shipping was free and I could send it back if it did not fit or work. So I ordered.
Got it in a day, tried it out and it sort of fit. The nipple seemed a bit too small but the diaphragm itself was perfect. Once you put it in its cage there is nowhere for it to go so I thought I would try it out.
Put it on and started it up...actuators are still as church mouse. I actually think it helped the bottom end a bit.
Anyway, hope it helps with the issue. It had been discussed before but no one ever said where to purchase (that I could see). So try:
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#5
Thread Starter
Member
Joined: May 2021
Posts: 221
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From: North of Houston, Texas
2013 CL 63, 2002 E 55, 04 Jaguar XJ8, 66 Jaguar XKE
Yes, it it pretty obvious when the actuator rod is fluttering back and forth. The Amazon part is a good deal. I have seen people ask upwards of $70 for that part. It is an relatively easy repair.
#6
Thanks for this info, I just purchased the Amazon part for my 2015 ML63 (60k miles), no idea if it actually needs replacing but for $18 NZD delivered I don't really have an excuse not to swap it out, sounds like it's a matter of time before it needs doing.
#7
Super Member
Joined: Feb 2017
Posts: 928
Likes: 426
From: Baltimore County, MD
13 s212 63 p30. 03 s55amg. 06 LX470
Hi all,
I purchased the inexpensive Amazon check valve and replaced it this morning. There was no diaphragm left in the original check valve. There was no visible flutter on the wastegates. It was very oily when removing. The new valve went in and I can tell an immediate difference. You will have to use a pic on the hose.
stock p30 13 wagon. 68k miles.
This is a great repair that’s easy and yields big. I have always hated the little bit of hesitation between 1500-2000 rpm. It’s been hard to determine whether it was mct, vacuum, or the oil pressure. Between this and the solenoid disconnect, my car feels great.
I purchased the inexpensive Amazon check valve and replaced it this morning. There was no diaphragm left in the original check valve. There was no visible flutter on the wastegates. It was very oily when removing. The new valve went in and I can tell an immediate difference. You will have to use a pic on the hose.
stock p30 13 wagon. 68k miles.
This is a great repair that’s easy and yields big. I have always hated the little bit of hesitation between 1500-2000 rpm. It’s been hard to determine whether it was mct, vacuum, or the oil pressure. Between this and the solenoid disconnect, my car feels great.
Last edited by Baltistyle; 12-16-2023 at 02:48 PM.
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#8
Out Of Control!!
Joined: Jun 2004
Posts: 12,160
Likes: 2,224
2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
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Baltistyle (12-16-2023)
#9
Super Member
Joined: Feb 2017
Posts: 928
Likes: 426
From: Baltimore County, MD
13 s212 63 p30. 03 s55amg. 06 LX470
For reference.
I’ve not seen anyone mention a part number for the valve on the other side of the pump but had that side been inspected yet by the forum?
Last edited by Baltistyle; 12-16-2023 at 02:49 PM.
#10
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Joined: Apr 2019
Posts: 6,281
Likes: 3,887
From: Silicon Valley
MY'14 W212 M276 3.5NA @60kMi
Vacuum pump...
Brake booster output check-valve??
It's known to be trouble free.
The small check-valve takes the blunt of crankcase pressure inside vacuum pump. It's lower and weaker to act as a pressure relief.
> Check for oil swamped into diaphragms down the small vacuum line.
> Brake booster output is located high up and immune to oil invasion to stay reliable.
Last edited by CaliBenzDriver; 12-16-2023 at 05:42 PM. Reason: ESL
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#11
Super Member
Joined: Feb 2017
Posts: 928
Likes: 426
From: Baltimore County, MD
13 s212 63 p30. 03 s55amg. 06 LX470
What other side of vacuum pump?
Brake booster output check-valve??
It's known to be trouble free.
The small check-valve takes the blunt of crankcase pressure inside vacuum pump. It's lower and weaker to act as a pressure relief.
> Check for oil swamped into diaphragms down the small vacuum line.
> Brake booster output is located high up and immune to oil invasion to stay reliable.
Brake booster output check-valve??
It's known to be trouble free.
The small check-valve takes the blunt of crankcase pressure inside vacuum pump. It's lower and weaker to act as a pressure relief.
> Check for oil swamped into diaphragms down the small vacuum line.
> Brake booster output is located high up and immune to oil invasion to stay reliable.
#12
MBWorld Fanatic!
Joined: Apr 2019
Posts: 6,281
Likes: 3,887
From: Silicon Valley
MY'14 W212 M276 3.5NA @60kMi
CRANKCASE PRESSURE....
Both PCV and vacuum pump are impacted by the piston blow-by. It's all inter related.
High blow-by messes up everything. It makes the engine behave like an old Pinto.
Once it's back under control with sealed rings, it's smooth operations for the ECU to remap power...
#13
Senior Member
Joined: Jun 2020
Posts: 327
Likes: 108
From: Finland
2015 CLS550 Shooting brake 4-matic
Hi
I did check my valve today and it was broken.
Is this the right part?
https://www.ebay.co.uk/itm/364560723...hoCcS8QAvD_BwE
And do Mercedes sell this part at all?? I would like buy original not China if I can choose.
I did check my valve today and it was broken.
Is this the right part?
https://www.ebay.co.uk/itm/364560723...hoCcS8QAvD_BwE
And do Mercedes sell this part at all?? I would like buy original not China if I can choose.
#14
Hi
I did check my valve today and it was broken.
Is this the right part?
https://www.ebay.co.uk/itm/364560723...hoCcS8QAvD_BwE
And do Mercedes sell this part at all?? I would like buy original not China if I can choose.
I did check my valve today and it was broken.
Is this the right part?
https://www.ebay.co.uk/itm/364560723...hoCcS8QAvD_BwE
And do Mercedes sell this part at all?? I would like buy original not China if I can choose.
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PekkaH (12-17-2023)
#15
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Joined: Jun 2020
Posts: 327
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From: Finland
2015 CLS550 Shooting brake 4-matic
#16
I have received my MagiDeal valve (second actually, first was dissembled on arrival) and tested it by blowing in and out - it flows both ways, although more freely in one direction. I expected that this valve should be completely closed in one direction, do i have a dud ? Should the closure happen with higher pressure?
#17
I have received my MagiDeal valve (second actually, first was dissembled on arrival) and tested it by blowing in and out - it flows both ways, although more freely in one direction. I expected that this valve should be completely closed in one direction, do i have a dud ? Should the closure happen with higher pressure?
I installed it anyway as my original check valve looked the same as Baltistyle's in the photos above - completely broken.
Using long nose tweezers, and a mirror, I fished out the old broken part, cleaned up some residual oil around the line and installed the new part.
Went for a long drive today, but no WOT. Still, the engine pulls like an absolute freight train under 3k rpm. But as I've only applied the oil pump solenoid mod in the last week it's hard to know what benefit replacing the check valve has had yet.
I'm planning to re-inspect the new part in a week or so to observe any oil leakage around the vacuum line, the MagiDeal part could well be a dud.
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PeterUbers (12-26-2023)
#18
so whats the indications to swap this out.... are we feeling less boost
as i mentioned in one thread our 278 s500 has a low boost pressure code and the shop showed this video where there was play in the wastegate actuator on passenger side.
as i mentioned in one thread our 278 s500 has a low boost pressure code and the shop showed this video where there was play in the wastegate actuator on passenger side.
#19
#20
Joined: Nov 2016
Posts: 5,441
Likes: 2,031
From: Maryland, United States
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Try this. He just copied the wrong info. URLs should not have commas.
#21
Can't make this up - my old valve was worn and stuck in the funniest way possible when removed (with retaining plastic ring left in the vacuum pump).
After a couple of days with new valve - "it feels" like low/mild acceleration is better, no engine rpm flutter.
After a couple of days with new valve - "it feels" like low/mild acceleration is better, no engine rpm flutter.
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PeterUbers (01-01-2024)
#22
MBWorld Fanatic!
Joined: Jun 2020
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04 E55 AMG (totaled), 07 S550 4Matic, 14 E63S
Now unplug your oil pump solenoid if you really want to feel an improvement.
#23
Out Of Control!!
Joined: Jun 2004
Posts: 12,160
Likes: 2,224
2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
how many miles on your car? Nice work
#24
next to troubleshoot - remove ecu tune(easy to put back), replace oldest coils, check spark plugs indexing