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Re: 1550 Diesel Intake valve seals??

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01-03-2013 10:13:11

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OK so I did what J suggested. Removed intake as well as valve cover. Appears what problem is is that stud bolts that screw into block is where oil is coming out. Threaded holes go through to oil side of head and bolts are not sealed. Poured oil down one intake valve stem and it filled and started coming out threaded hole.(I had removed all studs at this point.) Obviously no seal at top of valve stem. I wondered if oil was entering cylinder when valve openned, so I turned engine over by hand didn't see oil level inhole change but I was on oppisite side of engine to turn over engine. Pulled fuel shut off and turned engine over with starter. Again didn't seem to change level in hole or oil pouring through rocker arm system for that matter. Every thing moving and looks well lubed but no noticable amount accumulating in 30 sec. or so. So I assuming that if there are seals at the bottem stopping oil from entering cylinders but below thread holes in head although my test was not overly scientific and I could well be wrong. Casting number on head inself is 180402K if thats of any use. Figure to seal studs with some kind of gasket sealer and put her back together as I will need it to feed again tommorow. Would still appreiciate any further input from you more knowledgable folks out there. Thanks again Rocko.

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J. Schwiebert

01-03-2013 18:56:12

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 Re: 1550 Diesel Intake valve seals?? in reply to Rocko, 01-03-2013 10:13:11  
What stud bolts? You took the valve cover off and there are 6 studs that hold the rocker arm shaft on. Is that what you are talking about? How oily were the valve stems when you looked at them through the intake ports. Are you thinking about working on the miss right now?

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01-04-2013 01:19:20

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 Re: 1550 Diesel Intake valve seals?? in reply to J. Schwiebert, 01-03-2013 18:56:12  
Hello J. I took the intake manifold off as you suggested. I also took the valve cover off. The six stud bolts I refered to are the intake manifold to HEAD (I mistakenly typed block other post) mounting studs. The threaded holes these thread into go straight into oil chamber of head and were loose and leaking. Valve stems are not visible from intake ports. Yes I am still chasing that miss and excesive smoking issue. I have previously taken the exhaust manifold off and watched which cylinders are smoking and it seems to move around and change as engine warms up. Thanks Rocko.

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