And I thought you just might like to see this little job I did on a TEF diesel throttle venturi it was very worn on the main shaft and the main body , It had a massive air leak which is no good when your trying to set the engine up, what I do is strip the unit out and line bore it in the lathe , then make inserts that I press in to the main body and ream out to fit the shaft this picture below shows one of the inserts
and a bit of a close up
then I give the body a bit of a clean out they can get a bit grubby
you can see the insert
then I put it all back together and set it up
all done and no air leaks , by the way if you have problems with setting up the tick over on the TEF 20 you will find the throttle body is worn you can check this by grabbing hold of the end of the shaft end on the right in the picture above and lifting it up and down if you can the throttle body is worn and as you can see we can help you
all done good as new
And this is Fred the TEF 20 Diesel running again with that very same throttle body on , just click the little picture
And have a look at this to I dident do do
http://uk.youtube.com/watch?v=zXx6yNd_Yas&feature=related