Humber FV1600

[Richard Farrant]

Originally Posted by Richard Coutts-Smith

Been talking to another Aussy Humber owner who has a query:

"I suspect the valve guide seals on the vehicle are in poor shape. The Rolls manual on these engines seems to indicate that these are relatively easy to replace without removing the head. Are they rubber seals or something else?"


I note that the seal is referred to as an "0il Seal" in the workshop manual, and "Packing" in the spare parts book, and is on the inlet valve only?


It does appear (Rolls "B" Series Manual) that you can remove the inlet valve spring in situ, with the right tools to stop the valve dropping, but the Champ and Humber manuals both mention the oil seal replacement only with the head off.

Any one been down this path?
Rich.

Hi Rich,
The inlet valve seals or packings are made of a compressed asbestos cord, an archaic design even in 1950's terms. Apparantly there are modern alternatives, which the RR car owners have come up with an alternative, made of a "rubber type" material with a wiper lip. Perkins diesels used these types, amongst other makes of course.
I have renewed seals on a B60 insitu ( in a Ferret), by using a special tool that locks the inlet valve in the closed position. there is another tool to compress the valve spring to release the collets. Only did the task this way, the once, for a private owner, about 15 years ago, when done in army service we had to lift the heads if I recollect, as that was their procedure, and I do not recall these specail tools being available.

Only fitted to inlet valves, not needed on exhaust valves.

regards, Richard