Firstfives.org

I disassembled the throttle body and found shaft seals on either end that are both worn, and one is split. BMW must've done away with these on all later throttle bodies, I've never seen them before. These are NLA (13541257265) so I 3D printed some rubber replacements. https://i.ibb.co/m0RNPW6/IMG-13...

I built a smoke tester and have found a leak from the throttle butterfly pivot shaft. It leaks out through the TPS on one side, and the linkage on the other and is sufficient enough to probably be the cause of the whistle. It is more pronounced with the butterfly part open, so I would guess the shaf...

First off, really nice car dude. It does suggest a vacuum leak to me, also. Did you check for leaks around the intake runners? The lower plenum is easy to miss with the starter fluid test. I assume you've carefully checked the AFM boot that connects to the throttle body. Cracks in the bellows can c...

Hi all, Around 12 months ago I purchased a 1982 South African built e12/28 M535i which had been sitting in a shed for about a decade. Over this last 12 months I've been base lining the car and it's now registered, road legal and time for some proper shake down time. Overall it's now quite a solid dr...

I use these guys for this type of thing, they’re based here in Melbourne. Shoot them an email.

https://www.mackayrubber.com.au/