LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What cylinder TDC when dot to dot on timing chain?

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Old Jan 14, 2004 | 07:51 AM
  #1  
DR.ZED's Avatar
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What cylinder TDC when dot to dot on timing chain?

I've removed all my valve train components to install a new top end.

When I line up dot to dot on the timing chain, what compression stroke will I be on? The reason is so that I can bring it back to #1 to start pulling out springs, with the hub on.

12 o'clock the arrow points at TDC compression stroke of #1.?
Old Jan 14, 2004 | 07:55 AM
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Dots together is #6 TDC compression stroke, but both #6 and #1 pistons are at the top of their travel (#1 being on the exhaust stroke). Clear as mud?
Old Jan 14, 2004 | 08:15 AM
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Like... take more than 15 seconds to answer my posts next time okay????



It is clear. I had a SBC engine builder explain it to me.

Take the firing order and write them down. Like this:

1 2 3 4
5 6 7 8

So, #1 at TDC will be #5 at TDC if the firing order went 1-2-3-4-5-6-7-8.

Actually Rob, I neglected to keep the valve train on and find TDC before I took everything off. Ahh well.

I'll rotate 90 degrees plus whatever firing order I need to get to #1, and then do the wrapped screwdriver in the cylinder trick to get TDC.

Thanks!
Old Jan 14, 2004 | 08:57 AM
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Actually it's

1 8 4 3
6 5 7 2

Old Jan 14, 2004 | 09:05 AM
  #5  
DR.ZED's Avatar
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Originally posted by InjectedSS
Actually it's

1 8 4 3
6 5 7 2

I KNOW!!!!!

LOL!

Old Jan 14, 2004 | 09:59 AM
  #6  
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"if the firing order went"....not "the firing order of an LT1 is"..hehe

Joe
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