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Pontiac Forum: Timing Chain install
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  #1  
Old February 23rd, 2018, 10:29 AM
spectrumad spectrumad is offline
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Timing Chain install

Debate going on here. When installing a timing chain on a 1971 Pontiac 350, do you install "dot to dot" or "dots on top"? I have seen and heard arguments both ways and I suppose if other adjustments are made, either way will work.
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Old February 23rd, 2018, 11:21 AM
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the 1971 factory service manual shows them dots on top which aligns everything at #1 TDC
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Old February 23rd, 2018, 03:07 PM
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With #1 cylinder on TDC compression stroke Pontiac engine is dots on top, Chevrolet engine is dot to dot.

On a Pontiac engine dot to dot is when #6 cylinder is at TDC on compression stroke.
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Last edited by Kraig1957; February 23rd, 2018 at 03:26 PM.
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Old February 26th, 2018, 09:43 PM
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either way works.tom
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Old April 17th, 2018, 07:56 AM
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I second it doesn't matter if you crank the engine around the dots will line up dot to dot , a good method is always line up the dots on the old gears before removal .
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Old September 4th, 2018, 09:14 AM
frankz frankz is offline
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The Pontiac Service Manual shows the Dots on Top.
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