Smiths PCV Valve Differences?

[RJS]

Hi,

Just curious if any of our resident experts can enlighten me as to the differences between some of the various Smith's pancake PCV valves. Here are the 4 models I am aware of:

FVP 2001/02 Listed application is 1964-65 TR4
FVP 2003/02 Listed application is 1966-68 TR4A
FVP 2003/10 Moss Motors lists this for all TR4A
FVP 2003/11 Listed application is early TR6

Thanks everyone,

Bob

 

[TR_Jim]

As far as I know, the only difference is the way they mount. Some use a hose connection at the bottom, some are threaded to screw into the intake manifold.

 

[Andrew Mace]

...and still others, such as those on the dual-SU Spitfire Mk3 manifold, are simply a press fit into the manifold.