19-04-2023, 06:07 PM
Ivor, following your posts and Ruairidh’s earlier comment regarding gapping of piston rings I contacted the honing man this afternoon.
Fearing a complaint about to hit him he was somewhat guarded in his response, but after much discussion and talking thro’ my problem he confirmed that as they had supplied the rings they would have set them square in the bore and gapped to “suit”. However they do not keep records of that level of detail but as they are specialist rebore unit, and seeing some of the engines they were working on, they should know what they were doing.
I had match marked each piston to its relevant bore before leaving them with the machine shop and he confirmed the rings would have been set for each individual piston/bore supplied.
On my receipt all pistons still had my markings and all rings were fitted into their relevant grooves.
He also commented that had the rings been too tight, I would not have been able to fit them into the bores, someone with more experience could judge that comment.
As noted previously we initially thought it was a possible problem with lack of oil in the bores and I did squirt oil into each bore via the plug holes, this was left overnight and the engine turned many times now on the handle but this made no difference to the noise.
Went to the local A7 centre meet up today, no new ideas sprung to light.
Fearing a complaint about to hit him he was somewhat guarded in his response, but after much discussion and talking thro’ my problem he confirmed that as they had supplied the rings they would have set them square in the bore and gapped to “suit”. However they do not keep records of that level of detail but as they are specialist rebore unit, and seeing some of the engines they were working on, they should know what they were doing.
I had match marked each piston to its relevant bore before leaving them with the machine shop and he confirmed the rings would have been set for each individual piston/bore supplied.
On my receipt all pistons still had my markings and all rings were fitted into their relevant grooves.
He also commented that had the rings been too tight, I would not have been able to fit them into the bores, someone with more experience could judge that comment.
As noted previously we initially thought it was a possible problem with lack of oil in the bores and I did squirt oil into each bore via the plug holes, this was left overnight and the engine turned many times now on the handle but this made no difference to the noise.
Went to the local A7 centre meet up today, no new ideas sprung to light.