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8550 engine
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TrentH View Drop Down
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Joined: 05 Mar 2025
Location: Minnesota
Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TrentH Quote  Post ReplyReply Direct Link To This Post Topic: 8550 engine
    Posted: 17 hours 9 minutes ago at 7:34pm
We have a 8550 that the rear turbo started smoking and will not clear out even when it’s at operating temp and has what we think is a miss on one of the rear cylinders. Is it worth fixing the Allis engine or repower with a Cummins.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21458 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 16 hours 39 minutes ago at 8:04pm
If it was as simple as changing out one injector, why wouldn't you fix it ?? Looks like some good diagnosis is needed.
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TrentH View Drop Down
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Joined: 05 Mar 2025
Location: Minnesota
Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TrentH Quote  Post ReplyReply Direct Link To This Post Posted: 16 hours 28 minutes ago at 8:15pm
Haven’t dug to deep into it yet. It looked like more of blue smoke, like oil. I was thinking it was probably rings. Was going to check for bubbles in the antifreeze and make sure it wasn’t that to.
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Unit3 View Drop Down
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Joined: 17 Oct 2009
Location: NC Iowa
Points: 5575 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Unit3 Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 33 minutes ago at 11:10am
Dad had a 4w305 that started smoking out the front pipe. It was a lifter, cam lobe, blued and bent push rods, and adjusting screws.

On the rocker arm shaft, grind the smallest of grove from the oil holes @ 4:00 up to 2 & 10:00. That will make it easier for oil to come up and out the rockers and down to the adjusting screws, push rods, lifters, and cam. Also which to green dot rubbers on injector lines. Very best of luck!!!
2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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