21-09-2020, 07:18 AM
David and Squeak: thank you for the information, advice and suggestions.
I have yet to start cleaning the crankcase or checking the oil ways, so I shall do as you suggest. It is odd the the front and rear bearings are poorly, yet the centre main and the big end shells and all of the journals are in fine fettle. Judging by the existence of modern sealants, helicoils and some judicious use of silicon sealant, three con rods with shells and one with a white metal bearing, the engine has been worked on at some time in the none too distant past.
The engine came to me as a sound, quiet runner, but well down on power. Initial checks showed that the head gasket had gone and the bores were in a very poor state. The cam follower adjusters were also quite substantially different in their adjustments, two especially so, suggesting that the valves were not likely to be opening and closing fully.
The fun continues...........
Jamie.
Jamie.
I have yet to start cleaning the crankcase or checking the oil ways, so I shall do as you suggest. It is odd the the front and rear bearings are poorly, yet the centre main and the big end shells and all of the journals are in fine fettle. Judging by the existence of modern sealants, helicoils and some judicious use of silicon sealant, three con rods with shells and one with a white metal bearing, the engine has been worked on at some time in the none too distant past.
The engine came to me as a sound, quiet runner, but well down on power. Initial checks showed that the head gasket had gone and the bores were in a very poor state. The cam follower adjusters were also quite substantially different in their adjustments, two especially so, suggesting that the valves were not likely to be opening and closing fully.
The fun continues...........
Jamie.
Jamie.