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Re: 1984 Universal M18 wont start
Chances are pretty good the head warped so the engine has little or no compression. Unlike gas engines, diesel engines fire by compression and have nothing like a spark plug to make them fire. Glow plugs are not spark plugs.
Your friend will have to pull the head, have it milled flat again and with a new head gasket, reinstalled. Depending on the amount of milling, you may need to put in shorter rods, as well.
Big job, so while you're at it, I'd change the rings, main bearings, have the valve seats ground, check the cam, have the fuel distribution pump, injectors and oil pump serviced. You'll also need to readjust the valve train (rocker arms) and if you aren't very careful, the timing. New front and rear main seals would be good, too.
If the block is rusty, send it out for an acid bath, cleaning both the water and oil passages and have it painted professionally. If the engine is rusty, the engine mounts probably are too, those should be changed too, so you can align the engine when it goes back in.
If you do it right, it will be like a new engine for half the price of a replacement.
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows
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Last edited by capta; 03-22-2020 at 07:07 PM.