By joining you will help ensure that we can continue to provide this service
JOIN HERE!
Thoughts on my pistons/cylinders/heads?
Thoughts on my pistons/cylinders/heads?
R60/2, R65 LS
1973 Norton 850, 1973 RD 350
- Micha
- Posts: 763
- Joined: Fri Oct 12, 2007 2:24 am
- Location: Israel
- Has thanked: 10 times
- Been thanked: 5 times
Re: Thoughts on my pistons/cylinders/heads?
Everything looks fine. You can even see the honing marks.
If I were you, I would buy honing stones, connect to my drill and perform an easy renewal of the honing (use a correct oil solution for this). Then clean the heads and reassemble (It is of course better on this occasion to use new piston rings).
Before assembling, insert a piston ring into the bore, and with a filler gage make sure that you are in the correct specs.
R51/3 1952
Engine Nr. 529466
-
- Posts: 81
- Joined: Sun Oct 13, 2019 2:47 pm
Re: Thoughts on my pistons/cylinders/heads?
From your pictures my impression is it is not rings. When I have had leaking rings they will start to clean the face of the piston starting at the edge. Your pictures show a carbon coating all the way to the edge of the pistons.
I would check the valves and guides for the low compression and oil getting by the guides. Also looking at the pictures it looks like oil may be leaking from the oil return line at the bottom of the cylinder/head on the left cylinder.
I would still pull the cylinders to check everything I could and hone with new rings.
Jim.