Re: need advice removing injector on Petter PJ1 diesel

rcavictim wrote:

> After my deglazing job with a drill powered 3-stone medium grit
> deglazing hone I note that the cylinder diameter is smaller at the top
> of the bore where the poston rings never reached to the dimension at
> the bottom of the stroke where the rings do the reversal in travel.
> There was absolutely no ring ridge BYW. There was much corosion to
> clean up mid cylinder as the piston had been welded stuck at BDC with
> rust. The cylinder is shaped somewhat like a cone or perhaps a wooden
> wine barrel. The circumference deviation along it's length is not
> large however. The ring gap grows about 0.010" as the piston is
> pushed to the bottom of the stroke. The bore is therefore about 0.0032"
> larger there. What I was trying to say was that at this larger
> dimension the ring gap was still measuring within the engine
> manufacturer's spec for standard bore size.
>
> I am not going to worry about the minor bore irregularity, I am not
> tooled adequately as a engine rebuilder nor set up to bore with the
> cylinder under pressure as in using a head plate and this is a slow
> speed engine. With luck the ring exercise during each stroke will help
> keep them from becoming paralized wth the usual carbonization. I had
> to make my own tool to machine the valve seats. This rebuild is on a
> very tight budget.

"What I was trying to say was that at this larger dimension the ring gap
was still measuring within the engine manufacturer's spec for standard
bore size."

I suggest you give this some more thought.




.

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