Why OEM Isn’t Always ‘Right’

There I have been, touring the place in my W124. I know what you’re thinking. The poor M3 is in the unit, doing sod all, despite it being sunny outside with me sweating like mental in a non-AC’d W124! Up until a week ago you were right!

BUT, prior to it coming out I did actually do some rectification. What was it this time? The VANOS. Earlier on, some of you may recollect how I changed the pressure regulator seals along with the VANOS filter, changed the solenoid seals, cleaned out the valve body and also changed the solenoid pack, since mine seemed to be faulty. But what I forgot to say was that when I took the pressure regulator out for the VANOS refurbishment one of the seals, despite being a genuine BMW seal and having a total of 10,000 miles on it, was going square yet again!

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It was fair to say that I wasn’t best pleased. It seemed that their normal rubber couldn’t take the temperatures. But since I had a couple of Viton seals, courtesy of Hack Engineering I figured now was the time to fit them. This involved cutting off the old seal. Note how square the black seal has become:

With the new Viton items the whole assembly was prelubricated and refited. Has it made a difference? Not really but it will be interesting to see how these new items fare.

It’s just as well I got around to this as I would take the car to MotorPunk’s inaugral event. Now that was a great day out!

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