A bit of music from the lamented Radio Blog Club

Le Français

Toujours, je suis désolé pour mes amis( et amies) français(es), mais il est difficile pour moi d'écire en français. Peut-être un jour...
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Wednesday, August 15, 2007

Promises, promises!

I have been promising on the Viva-Lancia forum to post pictures of two tools useful when working on Fulvia engines.
The first is a modified piston-ring compressor. With standard piston rings, normally a compressor is not necessary, but with the thin rings fitted on some pistons (1mm, 1,5mm and 3mm rather than 1.5mm, 2mm and 4mm) I have found that breakages are possible - especially with the very fragile oil control rings. You will see that the compressor has been cut (ground actually) to match the angle of the vee.

The cutter is used for widening the valve clearance pockets in pistons when larger valves are fitted. It is made from a spare valve, of a suitable size of course with the aid of an angle grinder. It is easy to use: just insert in the guide, mount the head onto the engine with a couple of dowel bolts and with a battery drill apply rotation and very gentle pressure. Less than 30 seconds is usually plenty to provide a new pocket in exactly the right place. There is not normally any need to deepen the pocket. It is a good idea to smear a little grease to catch the small amount of swarf created, so that it may be collected afterwards.

One problem might be to find a suitable valve to make the cutter. I was lucky: I found a 40mm valve with the necessary 7mm stem. Most modern 7mm stem valves are for four-valves-per-cylinder engines and tend to be too small.


Anonymous said...

Cheers Paul, clever stuff, as usual :)

Michael Beattie

Paul said...

Thanks Michael

Sod the Law!


New Internet Speed test

Music and Radio Blog Club

Radio Blog Club, a good friend for a while appears to be in some legislative difficulty...

However, in tribute to its brave effort, I shall leave the existing track on this page (which amazingly still works)

Sadly my Playlist no longer works (hence its removal) thanks to the absurd "Hadopi" legislation in France. Apologies to all.