Chev 216 loose piston pin - which one ?

[Grant Bowker]

I took photos as being faster than finding files. The unattached plate is courtesy of Bob Carriere, comes from a cab 11 or 12. The plate on the brown background is facing the driver on a Chev Cab 13 doghouse.

[Mike K]

Been for a little drive in the C8 up/down the road.

Lack of power was noticed . I discovered , the timing was retarded by quite a lot, so a quick twiddle of the dissy fixed that .

I connected my old vintage ECHLIN vacuum gauge to the wiper motor pipe , it shows 20" of vacuum at idle , with a steady needle on the gauge and a blip down when I rev the engine . So I guess that's a good sign .

I've always had a strange squeaky noise coming from the engine , I thought it was bad generator bearing ? Well turns out it's the fan belt . The modern fan belt V section does not match the old V ways exactly , it rubs on the sides of the V . I think I will try a Industrial B section belt .

[Allan L]

I'm not an expert - but I thought V-belts did run on the sides of the V, not on the bottom?

[Mike K]

Originally Posted by Allan L

I'm not an expert - but I thought V-belts did run on the sides of the V, not on the bottom?

In my case, the V angles of the belt and pullies don't match as I have already stated

[Mike K]

Been doing some more testing. The valve rockers appear to be running dry, I can hear the noise of rattling valve springs . A peek in through the cap in the rocker cover reveals no oil anywhere . There should be some oil in there surely ?

Maybe the oil line coming up through the block to the rocker shafts is blocked ?

I will have to unscrew the pipe at the shafts and see if any oil comes through .

[cletrac (RIP)]

Rub some soap on a squeaky belt and it will stop squeaking. Liquid soap works too.

[Phil Waterman]

Hi Mike

The noise from the belt has a couple of causes that Ive found:
1. Rust or rust pits on the pulleys
2. Misaligned pulleys, particularly the generator
3. Old belts, they look OK but they get hard
4. Unusual load such as water pump or generator getting hard to turn
5. Belt tension too loose or too tight

If you are ever driving a Chevrolet CMP with the six blade fan and the engine gets quite, pull over you just lost belt.

As to the oil to the rocker assembly remove the cover and run the engine you sold see oil running out every where. Take look at some of the videos on my Web page. Look at the bottom of this page http://canadianmilitarypattern.com/EngineTesting.htm to see example of no oil. If there is no oil getting to the top then check the lifter gallery may be dry or you may find that is where the oil is broken. Take look at https://m.youtube.com/watch?v=bzq0JV...ature=youtu.be 235 engine but same idea.

Cheers Phil