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E34 (1989 - 1995)

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  #76  
Old 08-29-2013, 11:08 AM
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Quote:
Originally Posted by Doktor Bert View Post
I don't know, but the solenoid is receiving some sort of command at idle...maybe to retract????
i really doubt its being told to open at idle. we cant know what its being told really.

guess we'll just have to see what you find when you pull the valve cover
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  #77  
Old 08-29-2013, 11:54 AM
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Quote:
Originally Posted by Monsignor View Post
AU CONTRAIRE!!!! VANOS is a fantasic system.
Because torque.
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  #78  
Old 08-29-2013, 12:05 PM
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Originally Posted by Drew's525i View Post
Because torque.
only NV motors i would run are M30s or etas.
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  #79  
Old 08-29-2013, 12:07 PM
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Quote:
Originally Posted by Monsignor View Post
i really doubt its being told to open at idle. we cant know what its being told really.

guess we'll just have to see what you find when you pull the valve cover
True, hopefully nothing serious....I only have about $500.00 invested so I can fix a few things....

Car is in nice shape though....
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  #80  
Old 08-29-2013, 12:08 PM
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Shes beautiful. whats color is that?

i would do both tensioners and rebuild the VANOS then.
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  #81  
Old 08-29-2013, 12:39 PM
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VANOS should have been called DTKT - Das Teufel-Klappe-Timing
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  #82  
Old 08-29-2013, 12:40 PM
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Quote:
Originally Posted by Monsignor View Post
Shes beautiful. whats color is that?

i would do both tensioners and rebuild the VANOS then.
die Farbe ist oxfordgrünes...
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  #83  
Old 08-29-2013, 12:56 PM
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die Farbe ist oxfordgrünes...
Really, i truly thought it was blue? Still nice looking other than the dust.
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  #84  
Old 08-29-2013, 01:03 PM
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Quote:
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die Farbe ist oxfordgrünes...
no fricken way.

Mine is oxford. i'm colorblind but that looks blue
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  #85  
Old 08-29-2013, 01:04 PM
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Quote:
Originally Posted by Doktor Bert View Post
VANOS should have been called DTKT - Das Teufel-Klappe-Timing
LOL witty

why do you say that? some more knowledge???
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  #86  
Old 08-29-2013, 01:28 PM
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Quote:
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LOL witty

why do you say that? some more knowledge???
LOL, no, just reading about all the little problems with VANOS....
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  #87  
Old 08-29-2013, 01:30 PM
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Quote:
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no fricken way.

Mine is oxford. i'm colorblind but that looks blue
My cell phone isn't the best and it has been color sanded, so that changes the look somewhat....
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  #88  
Old 08-29-2013, 01:57 PM
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Quote:
Originally Posted by Doktor Bert View Post
LOL, no, just reading about all the little problems with VANOS....
count me a VANOS-whore
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  #89  
Old 08-29-2013, 02:05 PM
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Quote:
Originally Posted by Monsignor View Post
count me a VANOS-whore
I think VANOS is a good system, I am just very unfamiliar with it....so, being a true American, I hate what I don't understand...
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  #90  
Old 08-29-2013, 02:54 PM
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Quote:
Originally Posted by Monsignor View Post
AU CONTRAIRE!!!! VANOS is a fantasic system.
Not saying they are a bad system, it's just one less thing that I have to worry about. My E34 is my DD - 400-800 miles per week. I don't need something extra that can break down and doesn't benefit me that much (because I'm a grandpa afterall and I tend to drive kinda like one )

Had it on the 325is and I agree, moar torque
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It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
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  #91  
Old 08-29-2013, 03:11 PM
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You shouldnt be in a bimmer via that logic steve!!!
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  #92  
Old 08-29-2013, 04:42 PM
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Some have suggested this is a cylinder wash issue, possibly from the 5/30 Mobil 1 oil being too thin/too slippery to stay on the rings and cylinder walls. I entertain this as possible, but I do not think it would cause the 'spitting' sound of compression being released into the intake during the periods of 'zero compression' (in the spark plug hole) cranking. This leads me to suspect valve timing, even if not a VANOS fault.

I can easily change the oil, add a bit to the cylinders, and get this thing running, then see what transpires from there.

I also plan on checking the camshaft timing and reporting my findings.....
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  #93  
Old 08-29-2013, 04:49 PM
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Now it is possible, I think, to have a cylinder wash issue (from thin Mobil 1 5/30) AND a VANOS problem that are both unrelated. I guess the verification of the camshaft timing will tell us something soon....
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  #94  
Old 08-29-2013, 05:07 PM
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Quote:
Originally Posted by Monsignor View Post
You shouldnt be in a bimmer via that logic steve!!!
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Most problems are usually something simple !

Quote:
Originally Posted by noego View Post
It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

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  #95  
Old 08-30-2013, 06:04 AM
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Quote:
Originally Posted by Doktor Bert View Post
Now it is possible, I think, to have a cylinder wash issue (from thin Mobil 1 5/30) AND a VANOS problem that are both unrelated. I guess the verification of the camshaft timing will tell us something soon....
what will you be looking for when you say "verify camshaft timing"? Bear in mind that the intake cam is variable and does adjust its timing.

Turn the key to accessories with the valve cover off and see in the intake cam rotates with the oil pump priming.
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  #96  
Old 08-30-2013, 06:58 AM
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Starting to test a few things as time permits....

No fuel dribble from any of the injectors....pistons are dry, port floors are also dry....
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  #97  
Old 08-30-2013, 07:02 AM
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My big question is why the VANOS is receiving a signal at idle. This should not get a signal until elevated rpm's, correct??? If I plug it in, with the engine at idle and fully warmed up, the engine begins to 'lope' as if it is about to stall, so I unplug the VANOS again.

However, leaving the car sit overnight with VANOS unplugged changed nothing. I still have zero compression when cold start is attempted...
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  #98  
Old 08-30-2013, 07:03 AM
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Truly, with all due respect, whats the relation of that to timing and compression?
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  #99  
Old 08-30-2013, 07:26 AM
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All things suspect must be examined. Camshaft advance, at the inappropriate time, could cause compression loss. I am curious to know three things about VANOS:

1. What is the total amount of advance in degrees possible with this system?

2. At what rpm does the system 'normally' activate?

3. What sensor/values does the DME read before issuing a VANOS activation command?

I have already verified there is no 'dribble' from the injectors and the port floors and cylinders are not wet with fuel. I will check and report other test conditions at lunch today...
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  #100  
Old 08-30-2013, 07:27 AM
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Quote:
Originally Posted by Monsignor View Post
Truly, with all due respect, whats the relation of that to timing and compression?
I am curious as to why a system that is said to activate only at elevated rpm's is advancing the camshaft timing at idle sufficiently to nearly stall the engine...
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