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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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cyl. head valve recess spec.? 310T engine - 1855 tractor

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Author  [Modern View]

07-02-2014 10:24:07

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is there a spec. for valve recess for a 310 T. diesel engine , have a original shop manual and it says nothing on the subject , thanks for any help also does anyone know where you can buy new valves, having a heck of a time finding them after market , wouldnt think it would be so hard this is a common engine used in lots of industrial equipment , guess ill call Agco dealer & i know that will hurt the wallet

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B A Star

07-02-2014 14:55:26

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 Re: cyl. head valve recess spec.? 310T engine - 1855 tractor in reply to jasinpa, 07-02-2014 10:24:07  
Look at how much surface of the cylinder head is the intake and exhaust valves.  Turn the head upside down and install the valves.  Intake valve should project .014" to .029" Exhaust should project .026" to .034".  If you want it to start good run as it should the closer to the maximum numbers listed is better.  You may have to install new valve seats and/or new valves to get the proper measurements. Non AGCO parts have been giving us some problems.  After market cylinder head gaskets are too thick as compared to NOS.  Also if you are installing new aftermarket pistons we have seen some with the machined recession for the exhaust valve that are machined too deep.  these two items will reduces compression rato and causes hard starting and a poor running and performing engine.  Mesure everything before reassembly if you want it to run as a good Oliver should.

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07-02-2014 19:25:31

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 Re: cyl. head valve recess spec.? 310T engine - 1855 tractor in reply to B A Star, 07-02-2014 14:55:26  
was looking at buying a from , any input on there kits?

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07-03-2014 11:05:59

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 Re: cyl. head valve recess spec.? 310T engine - 1855 tractor in reply to jasinpa, 07-02-2014 19:25:31  
just did the 310 overhaul in 2013 and bought everything from agkits (red power brand). have 200 hours on the overhaul and still running great. also there is a service bulletin out there (cant think of it right off, so do a search on this site) for setting valve protrusion

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J. W. Schwiebert-2

07-02-2014 12:56:24

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 Re: cyl. head valve recess spec.? 310T engine - 1855 tractor in reply to jasinpa, 07-02-2014 10:24:07  
I have it downstairs on a sheet but it is important. It makes starting a lot better. I will double check but exhaust are 0.026 -0.041 Intakes 0.14 to 0.029 Keep them as close to the maximum as possible. When I got close I would swap valves to make sure I could get them all with in 0.005. You will need seats in all 12 ports and with a dial indicator mounted on the seat and guide machine you can do it. Head torque is also different than what is in some manuals. Intakes protrusion is important because of the larger surface area. I would also change the valve settings as well. Send me a phone number and I will explain it.

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07-02-2014 12:47:40

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 Re: cyl. head valve recess spec.? 310T engine - 1855 tractor in reply to jasinpa, 07-02-2014 10:24:07  
310 valve kit..includes guides in and ex valves, springs and keepers around $320 at

I would not worry about valve recess, take the head to a engine shop and have the seats ground...they'll tell ye if they are within specs or not,...they usually are but a hair to deep won't hurt a thing.

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