Wanted: Piston for Chev Engine

[wreckingchief]

the engine number N541606P was stamped on by NSW Police when a new engine was fitted with no number.
N for NSW
54 for 1954
1606 for engine
P for Police

Dave

[Willanthry]

Geez, this engine gets more and more mysterious! There must be a story that goes along with it.

Mike, the engine just has a dipper setup. This engine is proving difficult to find pistons for as well!

[jim sewell]

Toby
Your engine sounds like an early 50's splash feed , and if it has a 3. 9/16 bore then it probably would be a 235 cubic inch chev engine.
Parts should be available from Automotive Surplus in Melbourne .
Have a piston measured at 90 degrees to the gudgeon near the bottom of the skirt with a micrometer or digital vernier.
It's highly likely that it will be of std size.
Regards
Jim S.

[Phil Waterman]

I'm sure that you have thought of this but wanted to raise the issue, once you find a replacement piston and rod assembly consider having them all checked to see how well they match in weight.

I don't know what the tolerance for difference in piston weight is, though it has to change with how many RPMs the engine is turning. I've heard of low speed marine engines running with one piston assembly missing.

The Stovebolt 6 engine was extremely tolerant of mix and match assembly, I've found them running, if not always well, that appeared to have been assemble from the spare parts bin if not the junk bin, different types of valves, one that I rebuilt had 3 different types of pistons, (though not having a precision scale I don't know how different in weight) this same engine had a mix of bearings as well.

The last two engines I rebuilt (235 and 261) we did replace all the pistons as we had the engines bored out. So those engines got the crank and pistons balanced up as a set.

Keep us posted on the progress.

Cheers Phil