Posted by Hugh MacKay on March 11, 2009 at 04:08:24 from (216.208.58.178):
In Reply to: Bleedin' a 504 Diesel posted by Wild Bill Caldwell on March 10, 2009 at 19:54:35:
Bill: those early D-188 and D-282 could be a pig to get all the air out. I have a tendancy to say the same as 504-2, however if you have it running cracked each injector, one at a time for 2-3 minutes each and still getting air bubbles, I have to think you have an air suction leak somewhere between fuel tank and injection pump. These can be damn hard to find. I've seen cracked lines, cracked filter canisters, sediment bowl leak, etc.
I'd try letting it run for an hour or so at brisk idle, probably 1,200-1,500 rpm. If that doesn't cure it, turn fuel off at sediment bowl, take fuel line off at pump and apply about 20 psi back pressure through filters, lines and sediment bowl. I've seen air suck in, where fuel will not leak by graviety from tank. I've seen these older diesels run forever and a day, you know all is not perfect, and bingo that running out of fuel, brings out the worst.
I wouldn't rule out pump either, sometimes running out of fuel puts an end to a well worn old pump. I would do the other two ideas first.
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