I'm trying to find out what this cheeky chappie smothered in oil is called so that I can either replace the whole unit or at least the weeping gasket. The engine has had oil spilled all over it in a service which I've only just discovered and thankfully after a clean up it looks to be a weeping gasket. I've checked the engine bay diagrams and I can see the graphic for it but there's no name for it so I can do further research. Any pointers appreciated. The words "Mann Hummel" are embossed on the metal section. I don't necessarily have to do this myself as I have an extended warranty but I'm certainly curious.


Last edited by johnb8538 on 20th Oct 2021 8:13pm. Edited 2 times in total

I suspect TSOF - turbo shut off valve. Oil coming from a turbo? 405 AB exec seats Baltic and Cirrus
93 RR Classic efi

Remember it's easier to get forgiveness than permission!

Gone in order:
4.4 TDV8 SE - gone to a good home
93 Classic hard dash Plymouth Blue
03 L322 Oslo Blue
2000 Disco TD5 ES Epsom Green
98 P38 Rioja Red
89 Classic Cairngorm Brown

WOW thats an excellent response thank you. After a simple google search I compared a few diagrams with my photos and it looks to me you are 100% correct. Top chap!!





Apparently its a common problem on the three litre, great work.

 405 AB exec seats Baltic and Cirrus
93 RR Classic efi

Remember it's easier to get forgiveness than permission!

Gone in order:
4.4 TDV8 SE - gone to a good home
93 Classic hard dash Plymouth Blue
03 L322 Oslo Blue
2000 Disco TD5 ES Epsom Green
98 P38 Rioja Red
89 Classic Cairngorm Brown