Re: Farmall A Series Cylinder Compression Ratings

Posted by dunniteowl on April 23, 2007 at 20:12:48 from (207.69.137.22):

In Reply to: Re: Farmall A Series Cylinder Compression Ratings posted by Janicholson on April 23, 2007 at 17:47:10:

Great advice, Janicholson! I will keep updating this as I go along. This comes from an original post called: Help Need the (Farmall) A Team! Where I reported that I had an overheat issue, found a blown head gasket, then couldn't get the compression done well, found I didn't install gasket correctly (no sealing compound-- oops!) and then couldn't seem to get compression in the cylinders to match too well. I ended up starting all over with the gasket (removed it, scraped off compound, lightly sanded head and block surfaces, reinstalled and re-torqued in 5 pound increments from 10 pounds up to the new standard of 80 with the new gaskets.)

During that time there were a few times I tried to check compression without the rocker arm assembly installed. I know, stupid thing to do, but ultimately, I figured it couldn't really hurt as the pistons don't go to the top of the cylinder sleeve and the valves don't depress anywhere near the top of the cylinder wall/sleeve. Also I realize the cam-shaft is mated to the crank from below and not having the rocker arm assembly in place on top should not have any net negative effect. I am sure this could be wrong, but it logically seems sound from the perspective of construction.

I do believe, however, that this could seriously affect the timing and again admit I am happy to be wrong about that.

I am going to try the gas in the cylinder trick and if that doesn't do it, I will indeed be making sure the timing is set the way you suggest. From there I am sure new information will be coming.

Once again, thanks for the tips and I will be posting new stuff as soon as I have daylight, dry ground and no other distractions (I have no garage or actual workspace for my tractor and I just have to 'rough' it where she currently is in the yard -- which is growing ever higher as I attempt to satisfy the conditions that will get her to operate again.)

Replies:

• An Alternative View A. Bohemian 06:49:48 04/24/07 (1)
  • Re: An Alternative View Janicholson 07:21:58 04/24/07 (0)

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