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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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585 Valve recession 2655 Oliver

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todd08

01-30-2005 11:26:33




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Anyone know the specs on the Valve height? Thanks




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J. Schwiebert

01-31-2005 05:39:33




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 Re: 585 Valve recession 2655 Oliver in reply to todd08, 01-30-2005 11:26:33  
Mr Starr has given you a wealth of information! One comment I would make on the piston clearance is stay on the LARGE side. We sold a new 2-150 and it scored one spot about the size of a silver dollar in about 30-40 hours. We called WFE and they told us to keep it on the high side of clearance because the casting on the inside can vary a little. I also when I did the diesel head classes had to find one of the local shops a set of seats and I have not checked dimensions lately but they were a little on the odd size dimension wise. May have been metric like some Deeres. Don't remember. Questions?

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bastar

01-30-2005 23:17:17




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 Re: 585 Valve recession 2655 Oliver in reply to todd08, 01-30-2005 11:26:33  
These 585 engines are different to service from most other engines. The valve "recess depth" in the cylinder head is as stated, .033" to .045". You want to be as close to the lower number as you can get. It may mean replacing valves and seats. The engine is made up of a stack of: crankcase, cylinder block and cylinder head with two gaskets involved. When assembling, take two pieces of lead (you can cut slices off of a wheel weight) and place them opposite of each other on top of the pistons. Install the cylinder head and torque the nuts to 170 -175 ft Lb. Now roll the engine over, remove the cylinder head and measure the lead thickness. You want to be .040" to .045" clearance between the piston and cylinder head. When it gets to full load operating temp. with less than .040" you will think that you have a blacksmith working inside, however you want to be in the deminisions stated for power and good starting. The company supplied a number of gaskets with variance of thickness or you may have to machine the block to get to the proper clearance. If you bore the blocks, you must have .011" to .013" piston to cylinder bore clearance to prevent scoring when loaded. When you assemble, install the cylinder head with the stud nuts finger to no more than 15 ft lb tightness, then install the intake & exhaust manifolds and water manifold if you have it off and torque them first to align the blocks and heads. -intake nuts are 20 to 25 Ft lb and exhaust 55 ft lb. The bore in the blocks and cylinder heads for the studs are larger than the studs. Installing the manifolds lines the blocks and heads up to seal the gaskets. Failure to do so will allow abrasives to enter through non sealed intake gaskets. If you install new gaskets between the water manifold and blocks, you will notice that the opening in the gaskets is much smaller than the passages in the mainfold and block. Do not enlarge the openings, the coolant flow is balanced by the small openings acting as a restrictor. If the openings are enlarged, the rear block and head will run too hot, can cause cylinder head to crack. Good luck

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Larry from MD

01-30-2005 15:50:03




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 Re: 585 Valve recession 2655 Oliver in reply to todd08, 01-30-2005 11:26:33  
I looked in my book but its not there.I hope you are useing the new style valves the old ones break constantly.



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todd08

01-30-2005 18:08:35




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 Re: 585 Valve recession 2655 Oliver in reply to Larry from MD, 01-30-2005 15:50:03  
My tractor has the later valves, so I will definitely use them, As for the valve recession, none of my books state it either, notice the adv compression is 15.3, kind of low isn't it, would definitely like to go for most compression possible as they tend to blue smoke on start up. What do you think?



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todd08

01-30-2005 18:13:31




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 Re: 585 Valve recession 2655 Oliver in reply to todd08, 01-30-2005 18:08:35  
I did finally find the valve depth in one of my books, states .033-.045 for all. I am going out to measure some of my spares.



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