Materials to Maintain Your ZHP IIIII Hand Protection IIIII Tools to Maintain Your ZHP
Results 1 to 7 of 7
  1. #1
    Join Date
    Nov 2013
    Location
    Bay Area
    Posts
    2,973

    Where is this oil leak most likely coming from?

    The VCG at the top has been changed and looks good. The OFHG has been changed and looks good.

    The front main seal is original, but the front of the pan looks pretty clean.

    The oil pan gasket is original and a bit weepy. The AC pump is located above the oil pan gasket, so I’m a bit confused where it’s come from.


    Oil on AC pump




    Front of oil pan



    His: 05 330 ZHP Imola Red - 07 Z4 M Coupe Imola Red
    Hers: 04 330i ZSP
    2004 325 M56 Steel Blue Metallic - Sold
    Stephen's DD & AutoX/HPDE Build Thread
    Stewart WP - Z4M LCAB - M3 trans/motor mounts - DICE MediageBridge Duo - ARC-8 17x8.5"
    DrVANOS - Mason Engineering Race Strut Bar - E30 Exp. Cap - Custom Black+Beige Interior - M3 Seats
    Bilstein PSS10 - Turner Sway Bars 27/21 - ECST RTAB Limiters - R.E. RSM


  2. #2
    Join Date
    Nov 2017
    Location
    Irvine, CA
    Posts
    818
    Any oil on the topside of the AC pump? How's the rest of the front of the engine, clean or oily? Exhaust-side CPS sensor oring?

  3. #3
    Join Date
    Nov 2013
    Location
    Bay Area
    Posts
    2,973
    Quote Originally Posted by Will View Post
    Any oil on the topside of the AC pump? How's the rest of the front of the engine, clean or oily? Exhaust-side CPS sensor oring?
    I found the exhaust CPS and used my mirror to confirm it is clean on all sides.

    Top side AC pump looks clean too.

    The exhaust side of the block; where the coolant drain bolt is; is very very clean. It looks new, surprisingly.


    His: 05 330 ZHP Imola Red - 07 Z4 M Coupe Imola Red
    Hers: 04 330i ZSP
    2004 325 M56 Steel Blue Metallic - Sold
    Stephen's DD & AutoX/HPDE Build Thread
    Stewart WP - Z4M LCAB - M3 trans/motor mounts - DICE MediageBridge Duo - ARC-8 17x8.5"
    DrVANOS - Mason Engineering Race Strut Bar - E30 Exp. Cap - Custom Black+Beige Interior - M3 Seats
    Bilstein PSS10 - Turner Sway Bars 27/21 - ECST RTAB Limiters - R.E. RSM


  4. #4
    Join Date
    Nov 2013
    Location
    Bay Area
    Posts
    2,973
    Everything above the harmonic balancer looks clean.

    Everything below it is oily. Looks like it’s the front main seal

    Name:  Adjustments.jpg
Views: 326
Size:  1.26 MB

    Name:  Adjustments.jpg
Views: 280
Size:  1.60 MB


    His: 05 330 ZHP Imola Red - 07 Z4 M Coupe Imola Red
    Hers: 04 330i ZSP
    2004 325 M56 Steel Blue Metallic - Sold
    Stephen's DD & AutoX/HPDE Build Thread
    Stewart WP - Z4M LCAB - M3 trans/motor mounts - DICE MediageBridge Duo - ARC-8 17x8.5"
    DrVANOS - Mason Engineering Race Strut Bar - E30 Exp. Cap - Custom Black+Beige Interior - M3 Seats
    Bilstein PSS10 - Turner Sway Bars 27/21 - ECST RTAB Limiters - R.E. RSM


  5. #5
    Join Date
    May 2020
    Location
    Sammamish, WA
    Posts
    2
    +1 on front main seal. I just replaced mine and had similar leakage as your pictures. It was actually diagnosed at the dealer when I had the car in for the latest airbag recall. I chose to do it myself rather than pay the dealership rate.


    Mike Z.
    Summer Driver - 2006 330i Convertible 6MT, ZHP package, Titanium Silver w/black interior, silver cube trim
    Daily Driver - 2016 435i Gran Coupe AT, Alpine White w/Saddle Brown interior, M-Sport, M-Performance Track Package


  6. #6
    Join Date
    Nov 2013
    Location
    Bay Area
    Posts
    2,973
    Quote Originally Posted by zekim99 View Post
    +1 on front main seal. I just replaced mine and had similar leakage as your pictures. It was actually diagnosed at the dealer when I had the car in for the latest airbag recall. I chose to do it myself rather than pay the dealership rate.
    How long did it take you?

    Was dealing with the timing chain difficult?


    His: 05 330 ZHP Imola Red - 07 Z4 M Coupe Imola Red
    Hers: 04 330i ZSP
    2004 325 M56 Steel Blue Metallic - Sold
    Stephen's DD & AutoX/HPDE Build Thread
    Stewart WP - Z4M LCAB - M3 trans/motor mounts - DICE MediageBridge Duo - ARC-8 17x8.5"
    DrVANOS - Mason Engineering Race Strut Bar - E30 Exp. Cap - Custom Black+Beige Interior - M3 Seats
    Bilstein PSS10 - Turner Sway Bars 27/21 - ECST RTAB Limiters - R.E. RSM


  7. #7
    Join Date
    Nov 2016
    Location
    Charlotte, NC
    Posts
    3,130
    Silver lining - this gives you an excuse to add a chain tensioner for the oil pump!

Similar Threads

  1. Oil leak and Vaccum Leak: Help to diagnosis?
    By BavarianZHP in forum Mechanical | Troubleshooting
    Replies: 10
    Last Post: 01-08-2014, 11:41 AM
  2. Coming to a ZHP near you (mine, actually)...
    By Washburn in forum Mechanical | Troubleshooting
    Replies: 13
    Last Post: 02-11-2012, 12:22 PM
  3. Chirstmas is coming...
    By romanred62 in forum General -- ZHP Related
    Replies: 31
    Last Post: 11-15-2010, 09:24 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •