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 What is this page for? (Good question)
People have been very generous teaching me things in the past, its nice to pass on what I've learned on my own, or been taught by others.
These are a collection of interesting questions from people with Euro motors that I've come across in forums where I'm not a sponsor or vendor, and feel inhibited from posting. I do not wish to have my posting in a forum to be regarded as advertising for ABL Original Parts.
So, here in no particular order will be a running list of posts I might have put up when the questions were asked.
S50B32 Group N Tuning
A recent post suggested that Group N tunes came from the factory without EWS enabled. While this may be true for some versions, I would not count on it. The DME on my desk is labeled 5.11.99 and has EWS intact, it is a true Group N DME. It is also labeled GN 04. If anyone has a different version, I'd love to update this, and include that information. I didn't post this in forums because I have offered the removal of EWS for such a DME in the past, and it may well be that the OP has or has seen one of my versions which has the GroupN code, as well as the EWS delete on it.
How to test vanos for proper operation (S50B32):
GT-1 or a Modic system from the dealership will allow the diagnostic computer to run an engine through its paces and through the whole range of motion that the vanos allows for each cam sequentially. In effect, you'll be able to watch actual vs called-for angles, and by asking the engine to hold a certain position, you're also indirectly testing the function of the accumulator. If these tools are not available, a lot can be seen on the older Snap-On MT-2500 system using the 2002 cartridge for BMWs.
Chain Tensioners
The S38 and S14 crowd were probably the first to jump on the new version of the chain tensioner found on the S50B32. Use it on your S50B30 as well. Very simple.
Harmonic Balancers
Unfortunately, these do not last forever, and can let go when stressed, particularly with heat. They are designed to disperse energy of vibration, and if they are not kept cool, they will fail. Reference PTG E36 race cars with an odd extra opening on passenger side. This was a cooling duct directed specifically at the harmonic balancer. If you drive your car very hard, consider it a part that will fail eventually, and should be cooled in some fashion, or replaced before it does. I've seen at least 3 fail on customer cars that are driven hard. Look for cracks and separation of the hard rubber section from the metal section.
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