Posted by David Sherman on Saturday, September 03, 2005 at 4:54PM :
In Reply to: Moving 180?? Lines on right? Bad valves? posted by chriscase on Saturday, September 03, 2005 at 11:09AM :
More good suggestions, thanks. The "whump whumps" are faily even, which I sure hope they would be after overhauling the engine. I had the valves ground when I had the head off, but they weren't too bad. I assume they're adjusted right because I adjusted them after I put the engine back together, but it's kind of hard to check because I have to remove the fuel tank and some other stuff to remove the cast-iron valve cover.
I've thought a lot about the injector lines being wrong. All I can do is go by what it shows in the manual, and I've checked many times and they appear to be right. The firing order is 1-3-4-2, and "No. 1" is clearly marked on the injector pump, so even ignoring the manual, they seem to be in the right order.
I have tried loosening each injector line a little while the engine is running, and each time I loosen one it makes the engine run much worse, so I assume that means each cylinder is carrying part of the load.
I'm pretty sure that this engine will run, more or less, regardless of the timing, since it sort of runs with the pump in 180 degrees from where it should be, and it will start and run a little while if I spray wd-40 into the intake, even with the fuel shut off.
The fact that it's overheating and gutless makes me think it's either injecting way too soon (in one or more cylinders) or is injecting on the exhaust stroke and then some of the fuel burns on the next compression stroke when the piston is part-way up. It also smokes quite a bit (gray smoke), but I figure that's just because it's a naturally-aspirated diesel. It may be something more than that, though.
This one really has me baffled. I wish it was easy to try moving the oil pump drive gear one tooth either direction, but it's not, since I'd have to remove the oil pan for each adjustment.
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