Tag Archives: N55

F30 N55 intake charge pipe

 What are the chances,,,I was working on a couple of different cars and both of them were 2014 3 series with N55,,,,both have them had check engine lights on ,,,,both of them had identical faults air mass rich and lean … Continue reading

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N55 eccentric shaft,valvetronic motor

 Ok this is going to be a long post with a lot of pictures,,,,N55 check engine light on,,,,faults were valvetronic motor and valvetronic won’t reach its limit,,,,performed the test plan,,,operated the valvetronic motor test which passed the test twice,,,but when … Continue reading

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N55 vanos bolt broken

 Do you notice anything wrong in this picture,,,take a closer look at the intake vanos unit,,,,the intake vanos unit not sitting straight,,,,car got towed in from an auto body shop,,,engine won’t start,,,,engine turned over ,,,,but no start,,,,I noticed when cranking … Continue reading

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N55 cylinder headgasket leaking

 We don’t see this very often on a N55 about 25k miles,,,,the cylinder head gasket leaking oil,,,,leaking from the rear of the head by cylinder 6,,,this was a pretty good leak at that,,,,running down the rear of the engine and … Continue reading

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N55 blow off valve

 This is a good one,,,we don’t see this to often,,,,F10 2012 N55 engine,,,,check engine light came on 1 time only,,,,fault was turbo over boost,,,,happen at 2600 rpms,,,,,we already replaced the electric pressure control valve which sits next to the valve … Continue reading

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N55 high pressure fuel pump long crank

 Picture of a high pressure fuel pump on a 2012 F10 N55 engine,,,customer complaints of long crank during start up,,,integrated fault memory,,,no faults,,,,I then performed fuel rail pressure test was ok,,,,performed fuel injector leakage test ok,,,performed fuel pressure holding pressure … Continue reading

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N55 eccentric sensor

 Picture of a eccentric camshaft sensor on a N55 F10 2012 with about 50k miles,,,,check engine light on,,,,also noticed the engine didn’t idle to good,,,it had a rough idle,,,,also the power of the engine was low,,,,when the eccentric camshaft sensor … Continue reading

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