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Yes. 3-5. CRANKCASE VACUUM.3-5.1. General. The value depends to some extent on the type and size of air cleaner installed on tie engine.Regardless of type air cleaner used, vacuum with a clean air cleaner must not be less than a minimum of 0.79 in. (20mm) water gage (WG). The vacuum is measured...

What is the 'some other'? This engine is supposed to have a constant vacuum in the crankcase. There are 4 pistons and 2 move in sequence together as do the other two. Therefore, the piston movement cancells out any increase or decrease in pressure/vacuum, ie the internal space of the...

That I got. I just do not get the vacuum method to this engine.

Congrats. Any pictures of your set up and tie into the house?

Well, I know why there is a vacuum. It is because of the diesel fuel particulates in the crank case. If there is a sufficient amount of vaporized diesel fuel in the crankcase and you get it ignited by either heat or spark, you can have a primary and secondary explosion (like a back draft)...

I am having difficulty in finding that this broken rocker arm is responsible for the lack of either vacuum or pressure in the crankcase, What causes the vacuum in the crankcase (methology) and how do I restore it?

Parts on the way. Should be here by Thur. What to do till then.......

Not for a meer .002in. Just enough to make sure it's flat. Usually happens when you send the head out to be surfaced and rebuilt.

Replied.

This is his builder. I am going to speak about this. This is becoming pathetic at this time.

Blah Blah Blah......sometimes the keyboard says stupid things......

Some pictures of the head around the valve in question, the valve on intake 3 (3nd cylinder from the rear/flywheel 5th valve in sequence from the rear/flywheel), and the rocker arm break. Still looks like a fatigue break to me as it does not have the sharp surface of a clean break. but lighter...

Oil pressure does not spike. It did go from about 22psi cold (7psi warm/hot) to about 55psi cold, well within the limits, after the adjustment to the spring, but I knew that it was not a solid solution. At least it upped the 7psi at the end to 22 psi. But after a couple of minutes, the...

Well, after manually testing all the lifters, it appears that they are all working correctly. So the lifter is not the problem that caused the rocker arm to break. I had to use my drill press to press the lifter caps down to get the oil out of the lifters to test them. They were rock solid...

If that is the ONLY thing so far. I do not know if anything is wrong with the lifter. What take the chance that it could happen again by replacing the lifter? There does not appear to be anything wrong with the lifter sleeve or any othe4r part that would have caused the lifter to stick unless...

Think I am going to replace the lifter, push rod, and valve if it is damaged. Are you kidding me? The price for a single hydraulic valve lifter? Used one from $20, new one from $44 or buy all 8 lifters for $186. Dang, what are these things made of - GOLD? The lifter should be an off the...

This is going to be my new avatar....

Some pictures of what I did today after deciding to remove the head. Glad I did. Apparently intake valve 3 hit the piston. It just scuffed the piston top (not really anything) as you will see in the pictures. Both the piston and valve seem to be OK. No indicatikons of any abnormal wear in...