Jump to content

BMW N47D20A repair manual


Recommended Posts

Could someone please provide a repair manual for my 2007 BMW E87 with an N47D20A engine? I am particularly interested in the section that covers the timing chain and its associated phase indications. I am also unsure about how the High-Pressure Fuel Pump (HPFP) should be adjusted.

Link to comment
Share on other sites

For the n47 engine, when setting the crank at 45 degrees after top dead centre, there is a specific tool available for this purpose. However, if you do not have the equipment, you may mark the crank sprocket at the top and then calculate 45 degrees anticlockwise from the flywheel end. The HPFP sprocket line should be aligned with the notch in the casing. Then, the chain, guides and tensioner should be fitted. After that, the crank should be rotated back to top dead centre (TDC) and the other timing pieces should be installed.

Link to comment
Share on other sites

Thank you for providing the solution. Due to the many readings I have come across, I am uncertain if the correct angle is 11° or 45°. However, I have gathered that devices produced before 2013, like mine, should be adjusted to a 45° angle after undergoing the necessary post-market surveillance (PMS) procedures. This adjustment is made using the instrument included in the kit, namely the crank used to spin the engine. What would be the outcome if I adjusted the High Pressure Fuel Pump (HPFP) timing to 11° in my engine? According to your perspective

Link to comment
Share on other sites

The High Pressure Fuel Pump (HPFP) primarily maintains a consistent fuel pressure, while its timing is primarily adjusted to minimise vibrations and ensure that the piston in the pump aligns with a certain time in the engine cycle.
Actually, you may adjust it precisely when the engine is at top dead centre (TDC) without any uncertainty.

Link to comment
Share on other sites

Apologies for the confusion. I need to purchase a timing kit for my engine, but I'm unsure whether to choose the 45 or 11 option. Could you advise me on if the 45 kit is OK for my engine?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...