Howdy,
MOT time again for my e39 540i i bought about 5 years ago. Now with 211,000 miles on it - sailed through another MOT
I did have an advisory - an Oil leak.
I do know this because my rocker cover gaskets are leaking oil onto my manifold and causing a bit of smoke and smell. Most embarrassing sometimes!
All was going well until 2 days after the MOT it started missing all over the place and would not go over 20mph alongside loads of drama!
Turns out one cat had disintegrated, melted and blocked the exhaust, meaning that one whole bank would not ignite. On a v8 this is a bit of a problem!
So whipped off busted cat, replaced with new - sweet again.
While I was taking it apart, I also did the rocker cover gaskets.
All BMWs run hot, and this one especially. 4.4L creates quite a bit of heat, so much the engine will still be warm for days after a good run!
This had turned the rubber gaskets into hard brittle useless seals.
Here is the cover, with the gaskets which are obviously busted!
A shot of some engine bits.
All back together and working again.
Cost = parts.

MOT time again for my e39 540i i bought about 5 years ago. Now with 211,000 miles on it - sailed through another MOT

I did have an advisory - an Oil leak.
I do know this because my rocker cover gaskets are leaking oil onto my manifold and causing a bit of smoke and smell. Most embarrassing sometimes!
All was going well until 2 days after the MOT it started missing all over the place and would not go over 20mph alongside loads of drama!
Turns out one cat had disintegrated, melted and blocked the exhaust, meaning that one whole bank would not ignite. On a v8 this is a bit of a problem!
So whipped off busted cat, replaced with new - sweet again.
While I was taking it apart, I also did the rocker cover gaskets.
All BMWs run hot, and this one especially. 4.4L creates quite a bit of heat, so much the engine will still be warm for days after a good run!
This had turned the rubber gaskets into hard brittle useless seals.

Here is the cover, with the gaskets which are obviously busted!

A shot of some engine bits.
All back together and working again.
Cost = parts.
