timing issue

I installed my distributor and had all the marks lined up correctly. The timing mark on the harmonic was at zero, the valves on #1 were closed and when I installed the distributor and spun the engine over, I
took off the cap and the timing was out 180 degrees. How is this possible? Again I lined up all the timing marks, the harmonic, #1 cylinder, dropped in the distributor. Truned over the engine and again it was 180 degrees out. Can anyone give any ideas?
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With the cap off just lift the distributor out, rotate it 180 degrees, then drop it back in.

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Gary - KQ6RT (NoMoreSpam) wrote:

it did that.
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67rs/ss man wrote:

distributer turn evenly with the engine? It sounds like it could be a gear problem with the camshaft.
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Cy Welch
89 Camaro RS 5.0 TBI
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The valves will be almost closed on the top dead center stroke of the exhaust stroke other than the overlap of the cam. If you have the valve cover off turn it over watch for intake valve to open, after it closes when the piston comes up to TDC it is ready to fire. Put the dist in then on number one and fire it up.
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Gary - KQ6RT (NoMoreSpam) wrote:

it did that.
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if you are only rotating the engine over once the dist will be 180 out the dist turns at half the speed of the crank

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The Jones' wrote:

Insure that your intake valve has closed and that the exhaust has not opened. This will put it at top dead center on the compression stroke.
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