Ian jones
Well-Known Member
I could not put it any better !Fink I found the cutting problem and posted pic's etc into Ming's original fred.
There is a small vertical rib inside the valve housing on some TD4's that does not line up with the small cut out in the web of the venturi plate of the BMW part.
There is not a lot of clearance around the web when installed.
Others checked and found theirs lined up but others did not like mine! Seems to depend on when the castings were made?
If you do have a misalignment then as you screw the top down it pushes the venturi plate to one side and it's possible it will become dislodged and fall off the rubber seal that holds it onto the top.
It won't work too well like that.
If it all fits then you are ok - if the small cut out and rib don't align then it may fall off.
Was all written up in Ming's (I mean Porky's) excellent fred.
Hope it helps??