Motor and transmission?

[Pedro Bedard]

So, it turns out that the motor in my CMP has no compression. At all.
That, and the transmission has a rather large hole in it.

Is this project finished? Is there any replacement out there that will bring this beast back to life?
Any advice about this is welcome.

[rob love]

Is it the rings are worn or dry, or is it possibly the valves stuck open? Remove the spark plugs and put 3 or 4 squirts of oil in each cylinder. Try your compression test again. If compression goes up, then it may be that the cylinders are worn, or it could just have been that they were so dried out they weren't sealing.
If compression is at pretty much zero, even with the oil, then you may have stuck valves. Remove the valve cover, and you can pull any that are obviously down, back up with a small slide hammer. Turn the engine over and repeat the process until they all freely goe down and up. Worst case you have to pull the head and get a valve job, or at least a cleanup.


Chev transmissions are not particularly rare. There is some variation to them with regard to sunchros. All will work.



You can also keep an eye on kijiji or even place an ad looking for a 216 with transmission, or even make the jump to a 235 or a 261. https://www.kijiji.ca/v-engines-and-...ads/1082366768
The 235 is a fairly direct changeover, the 261 can be a little more complicated unless you are converting the truck to 12V. The ring gears are different between the 6v and the 12 volt vehicles. I have turned the flywheels on the 12 volt to accept the 6 volt ring gear.

[Phil Waterman]

Hi Pedro

As Rob points out and engine that turns but dosen't have compression may just be stuck valves. Many of us have rebuilt some really ugly engines.

As for the transmission when you say hole, how about a picture, these 4 speed transmissions were use on a lot of civilian and military vehicles. Yes parts are harder to get now than 40 years ago but they are still out there.

It really boils down to is the rest of the truck reasonably to restorable?

I've restored one very complete but lumpy HUP, one less than complete Pattern 13 C60S and one really rusty and uncomplete Pattern 12 C60L. They are now all good runners and I enjoy using and driving them.

Keep us posted on your progress.

Cheers Phil

[rob love]

Here is a cheap enough motor down in Baldur : https://ebrandon.ca/ItemView.aspx?it...1591&cat_id=67


Ad just went on a half hour ago.