I'm sure I saw a piston ring compressor but can't rememebr where. What was special about it was that instead of being a spring steel cylinder, it was step shaped cylinder (like you would get if you took a square profile roofing sheet and made a tube from it ; this had advantage that there is less friction on the ring plus you can poke a screwdriver or other implement in the raised steps to help prod the ring into place.

Anyone make sense of this and if I did not imagine this, where can I buy one?

Look up part number JSL21700 at www.burtonpower.com

Is this what you're looking for?

Cheers,
Bill

This the fella?


Part No: JSL21700
Status: Available from stock.
Item Price: £13.53
Surcharge: £0.00
Price: £15.90 (inc.Vat)
Description: WRINKLE BAND RING COMPRESSOR
Other Info: RANGE: 76.2mm - 127mm
Rescued attachment JSL21700.jpg

got the catalogue so probably where I saw it

has anyone used one of these and found it is better than the band type (not exactly as locost as a big jubille clip )

I made my own - worked OK with a bit of care.
Rescued attachment img_10.jpg

I have a long serving piece of tin and jubilee clip, always worked ok so far, splash of EP90 helps things along.

i have the crinkle band type, the tool had lots of burrs and sharp edges to score pistons. it works very well one the edges have been dressed.

Paul

I always used a bean can cut down the side and a jubilee clip but a few years ago I invested in a proper one, only about £5. I used lots of engine oil with STP round the inside while I knocked the piston down with the hammer shaft and never had any problems.