John,
To add to what Bill just said and to what I think Dick was getting at, if
the engine is on the rock but the marks on the crank pulley are not near
TDC, the timing chain may be your problem.
Peter
'68 TR250
>John
>I'll try to help you with the 'rock' business.
>
>What it means is that the exhaust valve is closing
>and the intake opening. This happens as the piston
>nears and passes top dead center. This means the
>cylinder is 180 deg out from firing - has just
>expelled exhaust and will be sucking fresh air
>fuel on the down stroke.
>
>In your area of interest when #6 is on rock the
>engine will be firing #1. Turn the engine over by
>hand. Watch #6 and when one valve closes and the
>other is opening you are there. It is called rock
>because if you rotate the crankshaft first one way
>and then the other the intake and ex. valve rocker
>arms will rock back and forth. Valves can be
>adjusted in this way. If 6 is on rock the engine
>is firing #1 and both valves can be adjusted as
>both valve lifters are on the back side of the
>cam. The sequence is 1-6,2-5,3-4. When one of
>these cyls is on rock the valves can be adjusted
>on the other of the pair.
>
>What you want to see is where the distributer
>rotor is pointing when the engine is firing #1. Is
>it pointing to where #1 should be n the normal
>dist. rotation or is it pointing 180 deg. out. If
>the rotor points the wrong way (to where 6 should
>be) the dist. drive gear may be installed 180 out.
>
>HTH
>Bill
>'70 6
________________________________________________________________________
Peter Macholdt
(609) 466-6458
(609) 466-6459 (fax)
117 West Prospect Street
Hopewell, New Jersey 08525
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