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Take a compression tester and hook it up. Could this set have bad rings? Stuck rings? Have been reassembled incorrectly? If you can turn it over by hand, somethings wrong. Valves or rings. can not be anything else. I wish I could be standing there with you. You said you had positive pressure on...

Fastback, First, if you want to turn the engine over without starting, use S-10, the Dead Crank Switch. No need to stuff rags into the intake. That's what the S-10 is for. Well, that and when you place it in the OFF position, you can not turn the engine over at the S-1, start switch. Its a...

You both are sounding like things are looking good! Keep it up.

Refer to my statement, "there are a lot of smart cats in this forum". Start a new thread, ask if anyone has done that, and if not, ask if anyone here might be able to gin one up. I could here, but it would work on 220 Volt, 50 Hertz/400 Volt, 50 Hertz. I know for a fact, that such things as an...

Here's my take on this question. The 002 and 003 engines are without a doubt, a better engine. Hands down. This engine will run without fail, for ever. The only real problem I ever saw, that is what I would call a show stopper, was the injector pump. I have only changed 4-5 in an almost 30 years...

The engine is made to run with a slight vacuum. Do you have manuals? Parts and maintenance procedures? What condition is your set in? If its seen better days, I often filled the oild sump up with dextron and ran it for two hours, no load. Drain and flush twice with cheap oil, change filters...

NSN is Army talk for National Stock Number. In the army, you dont order parts by part number, you order by NSN.

Now you got me. Its a closed system, so I think the pumping of oil from the sealed crankcase would create a vacuum. I remember that I used a water manometer to check to see if I had a pressure or vacuum. Cant remember how many inches displacement told me to get a new engine. Darn, I forget...

If you have pressure on the crankcase, indeed you probably have a ring problem. There should be a slight vacuum on the crankcase if I remember correctly. That's why there is no crankcase vent. The fuel rail is, and has been a problem the entire life cycle of the MEP-802 and 803 existence. Both...

Well, its almost 23:00 here and this old soldier has to rest a bit. I will give it some thought while watching the news and we will see what the new day brings. Will the engine turn over by hand?

There is a previous thread that might help you out. I am trying to remember who started it. Several people in the forum have posted good information on the fuel rail and repairs. If you look in the manuals section, I posted manuals needed to repair the 802 and 803 sets. The last document in the...