Quick VANOS question, what is this bolt?

T3AMFiSh · Thu, Apr-20-2017, 04:24:22 PM

There is a flat Allen head bolt on the top of the vanos, looks like a pressure bolt? Has an o-ring, I can't find any info on it, realOEM doesn't list it or the o-ring or it's torque spec.

Anyone chime in with some info on it?

nickpiper12 · Thu, Apr-20-2017, 04:35:53 PM

The only pressure bolt on top of the VANOS should be a 14mm hex banjo bolt.

http://www.realoem.com/bmw/enUS/show...94#07119905175

#9 on this diagram... should have a copper crush washer above and below the line. Runs from top of VANOS unit to the accumulator down below.

Torque spec - 13Nm or 9.5 ft-lb

If it's allen head, it doesn't belong. Maybe post a picture?

T3AMFiSh · Thu, Apr-20-2017, 04:49:21 PM

Yeah it's not that one, this one sits flush, I'll get a pic up

Slowmobile · Thu, Apr-20-2017, 04:52:34 PM

The goldish looking one right above the exhaust piston cap?

T3AMFiSh · Thu, Apr-20-2017, 04:53:24 PM

Yep that's it

M3_#67 · Thu, Apr-20-2017, 05:06:45 PM

That's nots a separate part. And does not need to be removed.

T3AMFiSh · Thu, Apr-20-2017, 05:21:48 PM

Ok, I removed mine do to needing to clean the vanos thoroughly, it's clearly a constant pressure type, like the one on the side of the engine block. It has an o-ring in there as well. NOw that I removed it, I just needed the know the torque spec to put it back. Guess I might have to contact Raj about it

M3_#67 · Thu, Apr-20-2017, 05:27:03 PM

Ah gotcha. It's not too common I see a reason to remove it. Except I do recall a member having his leak and need an O-ring.

T3AMFiSh · Fri, Apr-21-2017, 03:26:52 AM

Emailed Raj but he didn't know the torque spec either, most of the head uses 10-14Nm for external bolts to aluminum so I went with 13Nm

M_Parallel · Sat, Apr-22-2017, 06:27:54 PM

That's the inlet pressure regulator to the high pressure vanos pump. This regulates the pressure coming from the engine feed.

And then of course you have the 100bar pressure regulator after the pump.

Thu, Apr-20-2017, 04:24:22 PM	#1
T3AMFiSh Your mom goes to college Join Date: May 2008 Posts: 344 Reputation: 0	Quick VANOS question, what is this bolt? There is a flat Allen head bolt on the top of the vanos, looks like a pressure bolt? Has an o-ring, I can't find any info on it, realOEM doesn't list it or the o-ring or it's torque spec. Anyone chime in with some info on it?

Thu, Apr-20-2017, 04:35:53 PM	#2
nickpiper12 Registered User Join Date: Dec 2010 Posts: 3,643 In the garage: '04 BMW E46 M3 Reputation: 0 Location: Chicago	Re: Quick VANOS question, what is this bolt? The only pressure bolt on top of the VANOS should be a 14mm hex banjo bolt. http://www.realoem.com/bmw/enUS/show...94#07119905175 #9 on this diagram... should have a copper crush washer above and below the line. Runs from top of VANOS unit to the accumulator down below. Torque spec - 13Nm or 9.5 ft-lb If it's allen head, it doesn't belong. Maybe post a picture? __________________ 2003.5 E46 M3 SMG \| Alpine White/Black 2000 E46 "M3T" 6MT \| Steel Grey/Tanin Red 2011 E91 Touring Sport 6AT \| Alpine White/Chestnut Brown Journal

Thu, Apr-20-2017, 04:49:21 PM	#3
T3AMFiSh Your mom goes to college Join Date: May 2008 Posts: 344 Reputation: 0	Re: Quick VANOS question, what is this bolt? Yeah it's not that one, this one sits flush, I'll get a pic up

Thu, Apr-20-2017, 04:52:34 PM	#4
Slowmobile Na Na Na Na Na Na Na Na Join Date: Apr 2015 Posts: 423 In the garage: '06 BMW ///M3 Reputation: 0 Location: Los Angeles	Re: Quick VANOS question, what is this bolt? The goldish looking one right above the exhaust piston cap? __________________ Legen... Wait For It... ///M

Thu, Apr-20-2017, 04:53:24 PM	#5
T3AMFiSh Your mom goes to college Join Date: May 2008 Posts: 344 Reputation: 0	Re: Quick VANOS question, what is this bolt? Yep that's it

Thu, Apr-20-2017, 05:06:45 PM	#6
M3_#67 Registered User Join Date: Mar 2013 Posts: 335 In the garage: '02 BMW ///M3 Reputation: 0	Re: Quick VANOS question, what is this bolt? That's nots a separate part. And does not need to be removed. __________________ '02 Imola Red on Black

Thu, Apr-20-2017, 05:21:48 PM	#7
T3AMFiSh Your mom goes to college Join Date: May 2008 Posts: 344 Reputation: 0	Re: Quick VANOS question, what is this bolt? Ok, I removed mine do to needing to clean the vanos thoroughly, it's clearly a constant pressure type, like the one on the side of the engine block. It has an o-ring in there as well. NOw that I removed it, I just needed the know the torque spec to put it back. Guess I might have to contact Raj about it

Thu, Apr-20-2017, 05:27:03 PM	#8
M3_#67 Registered User Join Date: Mar 2013 Posts: 335 In the garage: '02 BMW ///M3 Reputation: 0	Re: Quick VANOS question, what is this bolt? Ah gotcha. It's not too common I see a reason to remove it. Except I do recall a member having his leak and need an O-ring. __________________ '02 Imola Red on Black

Fri, Apr-21-2017, 03:26:52 AM	#9
T3AMFiSh Your mom goes to college Join Date: May 2008 Posts: 344 Reputation: 0	Re: Quick VANOS question, what is this bolt? Emailed Raj but he didn't know the torque spec either, most of the head uses 10-14Nm for external bolts to aluminum so I went with 13Nm

Sat, Apr-22-2017, 06:27:54 PM	#10
M_Parallel Mr. OEM Join Date: May 2006 Posts: 2,150 Reputation: 0 Location: Home Court	Re: Quick VANOS question, what is this bolt? That's the inlet pressure regulator to the high pressure vanos pump. This regulates the pressure coming from the engine feed. And then of course you have the 100bar pressure regulator after the pump. __________________ '98 M3 3.2 SMG Cabrio • Alpinweiß III auf Schwarz • Deutschland-ausführung

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