[Will_460cs]

Originally Posted by Phil325i

It's a while ago now, but as I recall the length of old and new were pretty close to the same, but the spring of the old tensioner was more easily compressed.

Thanks for confirming again I’ll post some pictures when I have it apart.

[Will_460cs]

Some pics of hub rebuild and rusty axle nuts

[Will_460cs]

Pics of bushes and hubs refurbed

[Schomosport]

Originally Posted by Will_460cs

As normal car failed 1st emissions check as lambda reading was 2.2, Mot advisor was good enough to allow me to select the correct engine for 2nd test where parameter for lambda unto 4 is allowed.

I goofed and presented the car at MOT with EML on (failed HPFP) since i needed a ticket to keep road testing it. Automatic fail of course. Also failed emissions check on both runs, high lambda. Cert showed E39 on emissions page but I let it go because the EML on was slam dunk fail anyway.

Went back couple weeks later armed with the relevant page for the N53 from the emissions manual 19th edition. Went back a few hours later, pass cert received showing the car passed against the 'standard' limits it had previously failed on. Didn't get to speak to tester but will certainly do so next time I present the car just to 'remind' them.

[Will_460cs]

Doesn’t surprise me I have had more than one argument about labda readings and fail on first check. One once suggested it must be because of a leak in the exhaust.

What is the document you are referring too mot 19th?

I usually take the bmw printout about emissions and lamda readings now just incase.

[Will_460cs]

aha found it!!! very useful if your MOT tester wants to debate Lambda!!

https://assets.publishing.service.go...th-edition.pdf

[Will_460cs]

i fitted a new tensioner and measured the spring force

chain tensioner


old spring force fully deployed =25lbs
new bmw genuine fully deployed 29lbs

+- 2lbs

[Will_460cs]

some paint on the rear bumper, front wing & new bmw performance sill covers.

all running well, currently have 216 motorsports on, like the 18" on this car.

sump gasket / rod bearing check coming soon
nox decat - comming soon