TDC Valve positions
Moderator: martauto
I am going to put my cylinder head back on to the engine today, m20b25, but I just want to make sure that the valve positions are right before I do so. No 1 and 6 pistons are up, so should the valves for no 1 and 6 be closed when I put the cylinder head back on?
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E30_Crazy
- E30 Zone Regular

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Just turn the crank about 25-30* clockwise and all pistons should be at some level of mid-bore. Then get the head on, and tightened down. Turn the cam gear until the notch and line are inline (TDC for cam) and then turn the crank back the 25-30* to TDC, and it will be all lined up for the cam belt.
- Brianmoooore
- E30 Zone Team Member

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One set or the other should be partly open.bluff467 wrote:should the valves for no 1 and 6 be closed when I put the cylinder head back on?
As said above, never put a head on with any piston completely up.
When I line the marks up on the cam does it matter which valves are open and which are close, or are the valves automatically in the right sequence when the marks are lines up?
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HairyScreech
- Engaged to the E30 Zone

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the timing marks should be tdc number one cylinder, thus if you put both the cam and crank to there timing marks you cant really get it wrong.
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m3.3.1 m20 thread - now running, chip needed - any volunteers?
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m3.3.1 m20 thread - now running, chip needed - any volunteers?
http://www.e30zone.net/modules.php?name ... =viewtopic&

