Historical condition of small oil leak at head / block area....

racerbruce · 03-21-2018, 09:18 PM

During today's scheduled oil change using Castrol the OEM spec 10w/60w, it was noted that a very small oil leak was occurring at the head / block area. There is no compression leak - no other issues, and the leak is VERY small. My beloved Z4M Red Roadster has just over 65K miles....has anyone else experienced this?? The repair requires head gasket replacement - I was advised to monitor and assess, and not replace the head gasket at this time....your thoughts.

StickMon · 03-21-2018, 09:48 PM

You sure it's coming from there?
I thought that years ago and it was just my CPV.
Any chocolate milk on the bottom of your oil fill cap?

racerbruce · 03-21-2018, 10:02 PM

Quote:

Originally Posted by StickMon

You sure it's coming from there?
I thought that years ago and it was just my CPV.
Any chocolate milk on the bottom of your oil fill cap?

My tech stated that this is a common S54 oil leak due to the head drains it's oil at the outside are of the head, promoting this very small leak condition??

elerner61 · 03-22-2018, 08:30 AM

If you haven't yet changed your CPV O-ring it may very well be that. If it's not leaking yet, it will. Why not change it and then re-assess.

racerbruce · 03-22-2018, 01:11 PM

Quote:

Originally Posted by elerner61

If you haven't yet changed your CPV O-ring it may very well be that. If it's not leaking yet, it will. Why not change it and then re-assess.

Great - thank you.

SaltyNC · 03-22-2018, 01:52 PM

They make one out of Viton. You can probably find it googling, but if not, I'll try to find the link for ya.

StickMon · 03-22-2018, 01:54 PM

They're on Amazon now (what isn't).
https://www.amazon.com/BMW-S54-CPV-r.../dp/B00JD5V02K
https://www.amazon.com/Service-Viton.../dp/B01ASP3XL4

racerbruce · 03-22-2018, 05:42 PM

Thank you!

Boosted 1 · 03-23-2018, 01:49 AM

Quote:

Originally Posted by StickMon

You sure it's coming from there?
I thought that years ago and it was just my CPV.
Any chocolate milk on the bottom of your oil fill cap?

Same thing happened to me last year. I thought it was coming from my head. nope CPV. Hasn't leaked since replacing.

polar · 03-23-2018, 12:59 PM

If its at the front of the engine, ac-compressor-area and along the sump it can be the vanos steel gasket or the timing chain tensioner gasket.

elerner61 · 03-26-2018, 08:45 AM

One final add. When I replaced the o-Ring with the Viton one I also changed the CPV. It's cheap and since it's a slotted screwdriver head (??) I figured newer would be better.

racerbruce · 03-26-2018, 10:07 AM

UPDATE:
I did replace with a new OEM CPV last Mar (yr ago); still tracking my very small oil leak.

coh661 · 03-30-2018, 01:55 PM

I discovered a leak last fall, at first I was worried it was from the head gasket but upon closer look I believe it's the VANOS gasket. So this summer I'm doing a VANOS overhaul which will include a gasket replacement.

03-21-2018, 09:18 PM	#1
racerbruce Brigadier General 3854 Rep 3,004 Posts Drives: 21 X3 & 13 335is E93 Join Date: Dec 2009 Location: Seattle iTrader: (1)	Historical condition of small oil leak at head / block area.... During today's scheduled oil change using Castrol the OEM spec 10w/60w, it was noted that a very small oil leak was occurring at the head / block area. There is no compression leak - no other issues, and the leak is VERY small. My beloved Z4M Red Roadster has just over 65K miles....has anyone else experienced this?? The repair requires head gasket replacement - I was advised to monitor and assess, and not replace the head gasket at this time....your thoughts. __________________ Racerbruce
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03-21-2018, 09:48 PM	#2
StickMon My other car is on Mars 636 Rep 3,124 Posts Drives: 2006 MR Join Date: Feb 2011 Location: Lo-Cal iTrader: (1)	You sure it's coming from there? I thought that years ago and it was just my CPV. Any chocolate milk on the bottom of your oil fill cap? __________________ Warning: May contain traces of nuts.
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03-22-2018, 08:30 AM	#4
elerner61 Major 157 Rep 1,107 Posts Drives: '07 Z4M Roadster Join Date: May 2011 Location: Mount Kisco, NY iTrader: (0)	If you haven't yet changed your CPV O-ring it may very well be that. If it's not leaking yet, it will. Why not change it and then re-assess.
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03-22-2018, 01:52 PM	#6
SaltyNC Captain 370 Rep 870 Posts Drives: 2006 BMW Z4M Roadster Join Date: Oct 2015 Location: NC iTrader: (2) Garage List 2006 BMW Z4M Roadst ... [0.00]	They make one out of Viton. You can probably find it googling, but if not, I'll try to find the link for ya. __________________ 2006 BMW Z4M Interlagos Blue/Black Aux Port\|LED Interior\|LED Strip Trunk\|Underseat First Aid Box\|Stubby Antenna\|Intravee II\|BMW Oil Change Kit\|Top Down Side Panels\|Vibra Technics Engine Mounts\|Rogue Trans Mounts\|Engine Mount Bolts Upgrade\|RS Windblocker\|Euro Front Plate\|M5 Illum Shift Knob\|Supersprint Powerloop Exhaust\|Gruppe-M Intake\|RPI Scoop\|Black Grills\|19x8.5 ET35 F 19x9.5 ET22 R Sportline 8s PSS\| Besian Vanos\|CDV Delete
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03-22-2018, 01:54 PM	#7
StickMon My other car is on Mars 636 Rep 3,124 Posts Drives: 2006 MR Join Date: Feb 2011 Location: Lo-Cal iTrader: (1)	They're on Amazon now (what isn't). https://www.amazon.com/BMW-S54-CPV-r.../dp/B00JD5V02K https://www.amazon.com/Service-Viton.../dp/B01ASP3XL4 __________________ Warning: May contain traces of nuts.
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03-22-2018, 05:42 PM	#8
racerbruce Brigadier General 3854 Rep 3,004 Posts Drives: 21 X3 & 13 335is E93 Join Date: Dec 2009 Location: Seattle iTrader: (1)	Thank you! __________________ Racerbruce
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03-23-2018, 12:59 PM	#10
polar Private 53 Rep 97 Posts Drives: Z4MC07 Join Date: Aug 2009 Location: sweden iTrader: (0)	If its at the front of the engine, ac-compressor-area and along the sump it can be the vanos steel gasket or the timing chain tensioner gasket. __________________ perdidit in spatio 18" Arc-8 - Michelin Cup2 - KW V3 - GC camberplates - RE trans mounts - VT engine mounts - Vorshlag RTAB shims - RPi - stubby - CDV del
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03-26-2018, 08:45 AM	#11
elerner61 Major 157 Rep 1,107 Posts Drives: '07 Z4M Roadster Join Date: May 2011 Location: Mount Kisco, NY iTrader: (0)	One final add. When I replaced the o-Ring with the Viton one I also changed the CPV. It's cheap and since it's a slotted screwdriver head (??) I figured newer would be better.
	Appreciate 0 Quote

03-26-2018, 10:07 AM	#12
racerbruce Brigadier General 3854 Rep 3,004 Posts Drives: 21 X3 & 13 335is E93 Join Date: Dec 2009 Location: Seattle iTrader: (1)	UPDATE: I did replace with a new OEM CPV last Mar (yr ago); still tracking my very small oil leak. __________________ Racerbruce
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03-30-2018, 01:55 PM	#13
coh661 Banned 191 Rep 453 Posts Drives: 2007 Z4M Coupe Join Date: Dec 2015 Location: WY iTrader: (4) Garage List 2007 Z4 M COUPE [8.00]	I discovered a leak last fall, at first I was worried it was from the head gasket but upon closer look I believe it's the VANOS gasket. So this summer I'm doing a VANOS overhaul which will include a gasket replacement.
	Appreciate 0 Quote