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Case Tractors Discussion Forum
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Re: Trying to find Top Dead Center

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Author  [Modern View]

01-08-2013 17:04:05

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Well since you said plug then I know it is a gas engine. Take a plastic soda straw and have all the plugs out. Place the straw in #1 cylinder and slowly turn the engine by hand. You should be able to feel the straw coming up and the moment it starts to go back down you know your just past TDC. From there you have a 50/50 chance your on the compression stroke. If 180 out just swap the plug wires across the cap. Reason for the soda straw is it you get it stuck or other such thing it will burn out and not hurt the engine

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01-08-2013 18:14:31

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 Re: Trying to find Top Dead Center in reply to old, 01-08-2013 17:04:05  
Thanks. So if I get the air form the cylinder it must be the compression stroke, right? Why only 50-50. Will the exhaust stroke feel the same?...slim

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01-09-2013 05:22:11

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 Re: Trying to find Top Dead Center in reply to denverslim, 01-08-2013 18:14:31  
you will get way more pressure on the comp. stroke as the ex valve is open on the ex. stroke

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Case Nutty 1660

01-08-2013 19:02:10

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 Re: Trying to find Top Dead Center in reply to denverslim, 01-08-2013 18:14:31  
when you get it on top dead center you can pull the valve cover and see if both pushrods are loose on #1 cylinder if not turn it one more time and they should be loose that tells you you are on the right 50/50

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01-08-2013 18:32:28

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 Re: Trying to find Top Dead Center in reply to denverslim, 01-08-2013 18:14:31  
Reason I say 50/50 is because on both compression and exhaust stroke you can get some air coming out since on compression it is there to fire and on exhaust it is there to expel the exhaust and if turning it by hand you do not feel much on either. If you turn it over with the starter by the time you get your finger off the button it is long past TDC

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