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E46 318i TI Low Compression

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Good Day Gentleman

I did a valve stem seal change on my TI N42 engine.

After doing this I struggles to get it started. After the TI started it was idling very rough. I took a compression test and found that Cylinder 3 had low to non compression and I believe that's the reason for the rough idling.

I do not have the tool but I followed basically all instructions found on youtube.

I set the trigger wheel in the front of the cam gears with the eye. A guy on some site said that the holes in the trigger wheels should be at around 2:00 on exhaust and 10:00 on intake.

Can this be the cause of my cylinder 3 having low compression?

Thanks

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