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  #1  
Old 05-18-2021, 04:39 PM
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X5 E53 found my vacuum leak

Symptom: CEL for a variety of issues:
Misfire on all 6 cylinders
Lean on bank 1 and 2

Tested:
Fuel pressure tested fine on rail
Search for vacuum leaks...

Spraying cleaner on this part revealed the leak. You can hear the idle increase when I spray near the back of the unit (closer to firewall):

I assume this is unit is not supposed to leak air.

Furthermore, when I removed it, I found the "flap" to be loose on one end. Not sure if this is expected or not.


This part number 11617544805 known as the "adjuster unit", over $200. I assume I need to order a new one.

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  #2  
Old 05-18-2021, 05:15 PM
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If the pin is still there and the flap is still working, you can scrape off the o-ring that seals it to the intake manifold and replace it with a square cut o-ring. Don't remember the size of the square-cut O-ring but I believe some paintball gun uses the same square-cut O-ring.

None of the videos are working. Also, you mention that one end is loose, that's not a good sign especially if you are missing the pin. I wouldn't be driving the X until you find that pin. That pin can cause a lot of damage to the valves and head.
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Last edited by upallnight; 05-18-2021 at 05:23 PM.
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Old 05-19-2021, 02:39 AM
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You can usually repair DISA with a kit. I fixed my wife's with 20 of hardware. Search for awr-fix in title.

Definitely check for that pin.
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Old 05-19-2021, 09:06 AM
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I believe I have one I put a couple of moths driving on as I bought the repair kit, installed it and had the (New OE) upgraded DISA replaced for this one I have in a box in the barn.
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  #5  
Old 05-19-2021, 01:47 PM
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Quote:
Originally Posted by upallnight View Post
If the pin is still there and the flap is still working, you can scrape off the o-ring that seals it to the intake manifold and replace it with a square cut o-ring. Don't remember the size of the square-cut O-ring but I believe some paintball gun uses the same square-cut O-ring.

None of the videos are working. Also, you mention that one end is loose, that's not a good sign especially if you are missing the pin. I wouldn't be driving the X until you find that pin. That pin can cause a lot of damage to the valves and head.
Pin is there, but greatly worn. Outer pin is in place. Inner pin is there just very worn allowing the flap to move about, but not out of unit)

Not sure why videos aren't working. You can see the video what I'm talking about.

Name:  DISA.jpg
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Last edited by racebmwm3; 05-19-2021 at 02:02 PM.
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Old 05-19-2021, 02:10 PM
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You can seal DISA radially also. I use special Teflon tape that changes color under pressure so a couple test fits will determine if I have enough.

The starting fluid test is good to find vacuum leaks but I've heard best to use propane (won't drip into places that can cause a problem). Also, watch your O2 sensor reading real-time and you get a much more sensitive feedback vs. listen for RPM.
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Old 05-19-2021, 02:13 PM
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AWR-fix: repair DISA for 20
https://r.tapatalk.com/shareLink/top...ink_source=app
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Old 05-19-2021, 06:32 PM
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Quote:
Originally Posted by racebmwm3 View Post
Pin is there, but greatly worn. Outer pin is in place. Inner pin is there just very worn allowing the flap to move about, but not out of unit)

Not sure why videos aren't working. You can see the video what I'm talking about.

Attachment 80214
You can buy a repair kit on eBay for under $20.00n bucks or a new aftermarket DISA valve for Under $60 bucks.
Attached Images
  
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2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
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Old 05-19-2021, 06:52 PM
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Me, I would go to a Pick N Pull and buy a Genuine BMW part for under $10.00
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2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
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Old 05-19-2021, 08:38 PM
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Read my repair thread. Was 20 min. 20 repair
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