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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
Show Parts for Model:

Setting valves on Oliver 70

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raydex 234

05-26-2014 05:42:56
66.17.125.185



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I want to check the valve settings on my Oliver 70. What is the best method to do this. My machinist said when the exhaust valve opens and just starts to close, set intake. When the intake just starts to open, set exhaust. What are some other methods. Thanks.




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RWT

05-27-2014 19:16:29
50.45.25.164



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 Re: Setting valves on Oliver 70 in reply to raydex 234, 05-26-2014 05:42:56  
You're backward on the method. When the exhaust just starts to open set the intake.

Let the intake open and stop a little before it closes. Set the exhaust.

This method takes a little more turning but if you do it right you won't find yourself with one off and have to open it back up.

RT



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tom upton

05-26-2014 19:07:01
24.137.37.68



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 Re: Setting valves on Oliver 70 in reply to raydex 234, 05-26-2014 05:42:56  
I think your just a bit off, or your machinist is?. - when exhaust starts to open adjust intake. - when intake has opened and is almost all the way back closed adjust exhaust. when I built my first small block, about 40 yrs ago I had bought a crane cam for it and those instructions came with the cam. To this day I still set lash this way.



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hunt

05-26-2014 18:33:07
75.100.104.179



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 Re: Setting valves on Oliver 70 in reply to raydex 234, 05-26-2014 05:42:56  
There are several methods for adjusting valves depending on the make and model of engine. On engines were the manufacture does not give a specific sequence I always use the valve overlap method on companion cylinders. For example watch both valves on #6 cylinder as the exhaust is almost closed the intake will begin to open both valve rockers should be tight. That is valve overlap and the valves on #1 cylinder would be ready to adjust. Follow the firing order after this to determine what valves will be adjusted next. Number 5 cylinder will be next to be adjusted while valve overlap will take place on #2 cylinder. This method allows you to adjust all the valves in 2 revolutions of the crank. It basically puts the cylinder you are adjusting near top center compression stroke.

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Bison2010

05-26-2014 08:41:19
142.165.85.223



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 Re: Setting valves on Oliver 70 in reply to raydex 234, 05-26-2014 05:42:56  
That's the way I do it.



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