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Faults, Fixes and DIY Please share your experience and knowledge with other members by contributing your own DIY, or by helping another member find the elusive fix!

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Old Fri, May-03-2019, 06:29:11 PM   #141
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Default Re: S54 Vanos Info Thread

Did some more testing and discovered that I can scroll down in DIS vanos test. So response times are all "too long": intake 0ms and 0ms / exhaust advance 900ms and retardation around 400ms.

It is difficult to say how hard it pulls, as it is in a lighter chassis with short ratio diff, but it doesn't sound or feel bad. Sometimes it definetely pulls harder, but who hasn't felt that in their car I can see intake function code from DIS, but I am not sure about the codes appearance time, as there is no odometer or speedometer input and after clearing it seems like the old codes with old odometer readings are back after reset or something like that. Just got GT1 and DIS computer, so I am not very familiar with it.
It looks like Vanos piston seals are an option. Will order them from Beisan and try.
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Old Sun, May-12-2019, 04:23:41 PM   #142
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Default Re: S54 Vanos Info Thread

Getting to be time, subscribed.
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Old Fri, Feb-14-2020, 05:05:51 PM   #143
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Default Re: S54 Vanos Info Thread

Just did the full VANOS job. And a few takeaways that might help:

- Go slow and read instructions carefully. I followed Beisan with some inspiration from the Fat Boys Garage video.
- Follow the fat boys garage method of how to back off the hub bolts a quarter turn using a screwdriver as guide. Worked well for me.
- Loosen the coolant hard pipe mounting bracket bolt on the left side of the head when trying to remove the timing chain guide bolt. I would try loosening it and not removing it since getting it back on is a pain (ask me how i know)
- When tightening the hub bolts after pulling the vanos to the head, tie a string on your 10mm wrench in case it falls since there are no towels during that step.
- Check timing between each step of bringing the VANOS to the head. Don't tighten down the hub bolts of timing has drifted, pull vanos off and start over.
- Make sure VANOS is 5mm from head before tightening down the opposing bolts. Fat Boys use a caliper for this in place of the BMW spacer tool.
- While bolting the Vanos to the head to mate it up. Put two long-ish screwdrivers into the cam alignment holes. Movement of the screwdrivers will be easier to notice than the cams themselves moving slightly.
- If you're installing a rebuilt unit make sure to remove and reinstall the valve cover stud that's in the middle of the vanos.

Hope this helps someone tackling this job.
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Discussing S54 Vanos Info Thread in the Faults, Fixes and DIY Forum - Please share your experience and knowledge with other members by contributing your own DIY, or by helping another member find the elusive fix! at BMW M3 (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)