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  #21  
Old 01-27-2020, 09:13 PM
jac jac is offline
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Well... Yes that was indeed a stupid question. It is the vanos that drives the cams?! At least according to this: https://www.bmwn54tuners.com/diagnos...-vanos-system/
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  #22  
Old 01-27-2020, 09:52 PM
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Yes that is the only job of the vanos.

The timing chain is locked to the outside of the vanos teeth, the cam shaft is locked to the inside of the vanos. There is a helical gear inside the vanos that changes the relative angle between the two to advance or retard the cam shaft. It's controlled by the vanos solinoid that uses oil pressure to change that angle.

On the M62tu, they have vanos only on the intake cam, the M54 has on intake and exhaust cam.

The N62 not only adjusts cam angles it also changes how far the valves open by modifying the fulcrum of the valve rockers. I don't know if that engine also adjustable cam on the exhaust.
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  #23  
Old 01-27-2020, 10:10 PM
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I have not yet ordered the timing kit. You are probably right in that because the timing is off the VANOS gets shut off... But... what is bugging me is that the VANOS was already showing as "OFF" in INPA and PASoft before I took the VANOS apart to replace its o-rings. So what caused it to go OFF in the first place?

If the VANOS indeed gets disabled (off) by the computer when the timing is wrong, that means the timing went wrong all on its own... Can the timing be messed up on its own? If so, what would cause that? Thinking broken chain or broken plastic guides or broken tentioner?
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  #24  
Old 01-27-2020, 10:28 PM
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People have reported reluctor rings getting loose on M62 but not the m54. Was anything loose when you took it apart.

Feels like a wiring problem to me.

Does the computer software report connectivity to vanos solinoid and is there a way to confirm they are getting power.
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  #25  
Old 01-27-2020, 10:54 PM
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Call me crazy, but I don't think I'd spend a bunch of time on why it happened vs you have it back together now and "know" (pretty much) that it needs timed, why not time it and see what happens after that?


My thought, everything goes green, you go on happy it's running again


It stays yellow but the truck runs amazing, you go on happy it's running again


They stay yellow and the truck runs like crap still, well... then you've got bigger issues to dive in to -> But now you know for sure that it's not the timing


And you can really start focusing on other things. Just a thought
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  #26  
Old 01-27-2020, 11:40 PM
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Thanks guys.

Yeah, I am gonna do the timing, but I can't get to it for a few weeks. It took me like 6 hours to do the vanos o-rings so I know the timing is going to take me at least that long. But life is getting in the way of working on it the next few weeks/weekends, so I was just exploring ideas of what else it could be.

I have been watching some videos explaining the VANOS and how the computer activates it (solely via the oil pressure generated by activating the solenoids), all very interesting. One guy on a video claimed that it is activated when you floor it... So, I went out and floored it... nothing... the monitors still showed vanos off.

My wife says I just need a new car... Lol... But I just invested a few hundred $$ on it, and a bunch of my time, so I refuse to throw the towel. But yeah, I am starting to run out of patience for it.
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  #27  
Old 01-27-2020, 11:57 PM
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Quote:
Originally Posted by Purplefade View Post
Call me crazy, but I don't think I'd spend a bunch of time on why it happened vs you have it back together now and "know" (pretty much) that it needs timed, why not time it and see what happens after that?


My thought, everything goes green, you go on happy it's running again


It stays yellow but the truck runs amazing, you go on happy it's running again


They stay yellow and the truck runs like crap still, well... then you've got bigger issues to dive in to -> But now you know for sure that it's not the timing


And you can really start focusing on other things. Just a thought




Since you never time a vanos engine before I would suggest that you bring it in and let a tech that know what he is doing perform the service. Buying all the special tool that is required to perform the job will not result in any cost saving. I have seen people do more harm to their car by trying to save some money and fix it themselves instead of bringing it in. Although I have a lot of tools and willing to buy more tools I sometime bring my cars in to have an experience tech perform the work.
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  #28  
Old 01-27-2020, 11:58 PM
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Quote:
Originally Posted by jac View Post
Thanks guys.

Yeah, I am gonna do the timing, but I can't get to it for a few weeks. It took me like 6 hours to do the vanos o-rings so I know the timing is going to take me at least that long. But life is getting in the way of working on it the next few weeks/weekends, so I was just exploring ideas of what else it could be.

I have been watching some videos explaining the VANOS and how the computer activates it (solely via the oil pressure generated by activating the solenoids), all very interesting. One guy on a video claimed that it is activated when you floor it... So, I went out and floored it... nothing... the monitors still showed vanos off.

My wife says I just need a new car... Lol... But I just invested a few hundred $$ on it, and a bunch of my time, so I refuse to throw the towel. But yeah, I am starting to run out of patience for it.
You should subscribe to that Proverb, "A Happy Wife make for a Happy Life" . LOL
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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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  #29  
Old 01-27-2020, 11:58 PM
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Quote:
Originally Posted by andrewwynn View Post
People have reported reluctor rings getting loose on M62 but not the m54. Was anything loose when you took it apart.
Nothing seemed to be lose. But then again I really did not want to touch much when I took the vanos housing off, so I avoided touching stuff. I did have a look at the guides, they seemed ok. I barely touched the chain and it looked alright.


Quote:
Originally Posted by andrewwynn View Post
Feels like a wiring problem to me.
Yes, I agree.

Quote:
Originally Posted by andrewwynn View Post
Does the computer software report connectivity to vanos solinoid and is there a way to confirm they are getting power.
I do not know where to check in the software about whether or not the VANOS solenoids are detected. Hmmm... One way to find out: disconnect the suckers and see if it throws new codes.

Confirming if they are getting power is trickier, I think. I don't think I can use a non-contact AC/DC voltage detector, though I might give it a try. And a current clamp would require separating the cables... hmmmm... maybe I will insert some cables between the male and female.
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  #30  
Old 01-28-2020, 12:04 AM
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