Did you ever get an answer to your question about collar size, I just bought a kit with 9.6mm collar & mine are 6mm. I have an August 2005 E53 X5

Mark

I think the tapping at idle with oil cap off is normal for the 3.0l d. Its a flap under the oil filler area.

I had oil pressure /stop engine light come on once, shut down & restart but never came on again.

Does you light still stay on after reset?

Thanks for comments.

I am planning to strip & clean as I suspect that fault is caused by flame out (for whatever reason) so smoking after wards is a result of the fan motor being shut down & locked out?

Thanks for reply. Only happens when run in cold weather. I have no manual override. i.e do not power up pin1.

My E53 has had 3 failed glow plugs for a year now, with no starting problems. It appears that engine ok with no glow plugs down to very low temps. Big job to change as need intake manifold off.

I had a similar breakdown in Berwick last Easter but was fuel pump failure under LH floor. Always worth for codes first. Mine was low fuel pressure during cranki

I am a newbie to forum but have spent hours viewing above faults on my 55 plate E53 diesel heater. Read many posts about faulty PCB's, faulty resistors caused by capacitor sealing compound, etc. My 55 plate e53 will fire up but stop after 2 mins with erratic fan motor & then shut down then loads...

Hoppo, I'm a newbie to X drivers. Have you any contact details for French Mike. I have  a 2005 E53 Webasto heater which does just what your does/did. Starts up then fan runs erratically after about 2 mins & then shuts down with loads of smoke. Get INPA fault code fan error. We always restart whe...