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Search: Keyword(s): ; Posts Made By: Fudman
Forum: E39 (1997 - 2003) Yesterday, 11:34 AM
Replies: 6
Views: 155
Posted By Fudman
Also check your DISA valve. Symptoms are...

Also check your DISA valve. Symptoms are consistent with a failing DISA. It may be failing in the warm condition but working OK in the cold condition. Do not ask me why but $hit happens :dunno:.
Forum: E39 (1997 - 2003) 03-24-2015, 11:08 AM
Replies: 11
Views: 292
Posted By Fudman
1) Double check to make certain you have the...

1) Double check to make certain you have the right P/N gasket.
2) It does not look like you have any RTV at the half-moon locations on your cylinder head. Did you do that?
3) The gasket will...
Forum: E39 (1997 - 2003) 03-20-2015, 05:59 PM
Replies: 46
Views: 1,748
Posted By Fudman
Since you must remove the valve cover to access...

Since you must remove the valve cover to access the Vanos, clearly the improvements to engine performance are generated by replacing the VCG and not the Vanos O-rings. Those new VCGs do a great job...
Forum: E39 (1997 - 2003) 03-20-2015, 11:37 AM
Replies: 6
Views: 207
Posted By Fudman
+1, changing the tie rods will improve your...

+1, changing the tie rods will improve your steering feel and feedback. Since you are already doing most everything, may as well do it all. Here's the DIY: ...
Forum: E39 (1997 - 2003) 03-20-2015, 11:32 AM
Replies: 12
Views: 445
Posted By Fudman
Springs do not typically wear out (get softer...

Springs do not typically wear out (get softer with age). The struts do wear out and determining when to change them is completely subjective. Your fronts will typically wear out faster than the...
Forum: E39 (1997 - 2003) 03-20-2015, 10:49 AM
Replies: 46
Views: 1,748
Posted By Fudman
Really... Teaches it to whom? At the local...

Really... Teaches it to whom? At the local vo-tech school? They sure don't teach Vanos design in engineering school. I, for one, am skeptical as to why a so-called "teacher of Vanos design" is...
Forum: E39 (1997 - 2003) 03-19-2015, 01:12 PM
Replies: 2
Views: 128
Posted By Fudman
When you remove the lower cooling hose, coolant...

When you remove the lower cooling hose, coolant will drain out. How much will depend upon how fast you can replace the new hose. I am betting the entire radiator will drain before you can put the...
Forum: E39 (1997 - 2003) 03-19-2015, 12:18 PM
Replies: 2
Views: 123
Posted By Fudman
Good luck. This is certainly cheaper than...

Good luck. This is certainly cheaper than replacing the actuator (~$60). However, the risk is if the actuator fails in the future in the locked position, you must drill through the door panel to...
Forum: E39 (1997 - 2003) 03-19-2015, 12:11 PM
Replies: 11
Views: 260
Posted By Fudman
The problem with just using a HID bulb adapter to...

The problem with just using a HID bulb adapter to replace an H7 bulb (they do exist) is that the position of the new HID bulb is not the same as the older H7 bulb. Bulb position within the headlamp...
Forum: E39 (1997 - 2003) 03-19-2015, 09:23 AM
Replies: 42
Views: 992
Posted By Fudman
I think there is a fundamental misunderstanding...

I think there is a fundamental misunderstanding of what is being sought here. I think everyone "UNDERSTAND how the VANOS works", e.g. the DME instructs the Vanos piston to move to advance or retard...
Forum: E39 (1997 - 2003) 03-19-2015, 05:03 AM
Replies: 21
Views: 360
Posted By Fudman
A great reference. Clearly, not written by...

A great reference. Clearly, not written by marketing geeks. :thumbup:
Forum: E39 (1997 - 2003) 03-19-2015, 04:39 AM
Replies: 4
Views: 270
Posted By Fudman
I agree with everything except this article...

I agree with everything except this article suggests that the DME uses only the camshaft position signal from the CPS and initially adjusts timing based on RPM and throttle position. Subsequent to...
Forum: E39 (1997 - 2003) 03-19-2015, 04:03 AM
Replies: 7
Views: 296
Posted By Fudman
I used this DIY to install my M5 rear bar: ...

I used this DIY to install my M5 rear bar: http://www.bimmerforums.com/forum/showthread.php?835680-Rear-M5-sway-bar-install It all went smoothly but it does not provide instructions for removing...
Forum: E39 (1997 - 2003) 03-18-2015, 09:16 AM
Replies: 49
Views: 1,111
Posted By Fudman
I think our disagreement is due to different...

I think our disagreement is due to different operating conditions due to a warm or cold engine.

I think the better first question to ask is "Is there a difference in Vanos piston positions (which...
Forum: E39 (1997 - 2003) 03-18-2015, 05:48 AM
Replies: 49
Views: 1,111
Posted By Fudman
Most everything in the literature cited to date...

Most everything in the literature cited to date appears to assume that the engine is operating at the design temperature (warm). For those conditions, the DME has a program for specific camshaft...
Forum: E39 (1997 - 2003) 03-17-2015, 03:18 PM
Replies: 67
Views: 1,659
Posted By Fudman
An apology is not needed. I just didn't want to...

An apology is not needed. I just didn't want to be attributed to a position that I do not fully subscribe to. I do agree with your statement above. Better understanding leads to better decision...
Forum: E39 (1997 - 2003) 03-17-2015, 09:13 AM
Replies: 67
Views: 1,659
Posted By Fudman
I would like to be clear that I never made the...

I would like to be clear that I never made the statement above nor do I agree with it. Knowing anything about Vanos operation has nothing to do with stating that a replacement O-ring seal fixed a...
Forum: E39 (1997 - 2003) 03-17-2015, 05:45 AM
Replies: 67
Views: 1,659
Posted By Fudman
I think you are correct. The Vanos piston...

I think you are correct. The Vanos piston operates using an ON/OFF signal from the DME. Each Vanos piston is at fully advanced or at default (no advance) at any given moment. Given how the...
Forum: E39 (1997 - 2003) 03-17-2015, 05:26 AM
Replies: 42
Views: 992
Posted By Fudman
This is probably what they (BMW Marketing) mean...

This is probably what they (BMW Marketing) mean by increased lift. :thumbup:
Forum: E39 (1997 - 2003) 03-17-2015, 05:17 AM
Replies: 5
Views: 225
Posted By Fudman
This is the picture of the Vanos piston bearings...

This is the picture of the Vanos piston bearings that I should have referenced.
Forum: E39 (1997 - 2003) 03-17-2015, 05:10 AM
Replies: 5
Views: 225
Posted By Fudman
Short answer: No. Long answer: The pistons...

Short answer: No.

Long answer: The pistons are inside the Vanos unit. The piston interface with the piston cylinder walls are the teflon rings. These reduce the friction between the cylinder...
Forum: E39 (1997 - 2003) 03-17-2015, 04:42 AM
Replies: 42
Views: 992
Posted By Fudman
It cannot (and does not). Do not believe...

It cannot (and does not). Do not believe everything you read, especially on the internet.
Forum: E39 (1997 - 2003) 03-16-2015, 06:18 AM
Replies: 67
Views: 1,659
Posted By Fudman
A few things to consider: 1) You attribute...

A few things to consider:

1) You attribute much of the misinformation or misunderstanding about Vanos to BMW marketing. I am not entirely sure that is the case since the source of much of this...
Forum: E39 (1997 - 2003) 03-15-2015, 06:39 AM
Replies: 67
Views: 1,659
Posted By Fudman
Here is a Youtube video that best describes...

Here is a Youtube video that best describes single and double Vanos operation. https://www.youtube.com/watch?v=hW_1CBoLUCQ
And they use the term EGR and claim that Vanos helps the cats reach...
Forum: E39 (1997 - 2003) 03-14-2015, 07:54 AM
Replies: 12
Views: 323
Posted By Fudman
You do not need to replace all six coils. Ignore...

You do not need to replace all six coils. Ignore what the stealer has said. They are there to make money of you.
First, pull the codes (that will tell you where the problem is).
Second, swap...
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