Wanted: Piston for Chev Engine

Willanthry · #1 14-07-09, 03:33

Rightio, further research by myself and John Mackie has revealed that this engine is one that he didn't know even existed! According to him, the engine is a Chev 224 cubic inch; the piston is a 3 and 9/16 flat-topped piston, for a standard bore, with the Repco parts number "HX 1632", which Repco says did indeed exist, but is not made anymore.

Mike K · #2 14-07-09, 05:50

Quote:

Originally Posted by Willanthry

Rightio, further research by myself and John Mackie has revealed that this engine is one that he didn't know even existed! According to him, the engine is a Chev 224 cubic inch; the piston is a 3 and 9/16 flat-topped piston, for a standard bore, with the Repco parts number "HX 1632", which Repco says did indeed exist, but is not made anymore.

It could be a GMC motor, a 1940's contemporary of the Chev 216..both made at the same period. Does it have full pressure big end lubrication, instead of the dipper setup ? If so, it may well be a GMC motor .

Just looked up the 1940 GMH manual.....the GMC motors were the 1600H and 9600H one of these was 248 ci by the look of it

Mike

wreckingchief · #3 14-07-09, 12:15

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 · #4 15-07-09, 03:17

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 · #5 15-07-09, 03:45

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 · #6 15-07-09, 14:40

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