2.4L Performance Tech 16 valve 172 hp EcoTec with 162 lb-ft of torque

Timing chain issues

Old Jul 5, 2016 | 05:50 PM
  #21  
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I thought we were talking about installing the chain, not re timing it
Old Jul 5, 2016 | 06:03 PM
  #22  
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I counted 74 links, meaning 148 positions for the gear cogs to reside. 23 cogs on the crankshaft gear. 23 is a prime number. I think you have to have 148 full crankshaft revolutions for them to line up again.
Old Jul 5, 2016 | 06:14 PM
  #23  
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Originally Posted by donbrew
You described "three black links one is flanked on either side by a copper link". That is 3 with one marked special?

Or, is the copy & paste from post #1 wrong?
You are correct. I was afraid that it was generic for several engines and it depended on which engine to use one of the three links.
Old Jul 5, 2016 | 06:17 PM
  #24  
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Originally Posted by RJ_RS_SS_350
I counted 74 links, meaning 148 positions for the gear cogs to reside. 23 cogs on the crankshaft gear. 23 is a prime number. I think you have to have 148 full crankshaft revolutions for them to line up again.

Thank you for the math I was concerned, my 71 alpha spider did not have that problem. Thank God for kids.
Old Jul 5, 2016 | 06:19 PM
  #25  
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Originally Posted by firemangeorge
If the total number of links are correct in Donbrews picture, this is the count I got of the links between the marks.

Attachment 19419
Thank you 14 is the magic number I was looking for. That makes the magic link the one in the middle colored black.
Old Jul 5, 2016 | 06:23 PM
  #26  
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Originally Posted by Scorangehhr
Thank you for the math I was concerned, my 71 alpha spider did not have that problem. Thank God for kids.
That is k.i.s.s. darn spell checker.
Old Jul 5, 2016 | 06:28 PM
  #27  
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Originally Posted by firemangeorge
If the total number of links are correct in Donbrews picture, this is the count I got of the links between the marks.

Attachment 19419
Mine is a vvt, so on the intake shaft my book shows the link like this diagram. My link will only go one cog to the left or to the right not center. But there is a diamond to the right so I think I can assume it should go there.
Old Jul 5, 2016 | 06:36 PM
  #28  
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I want to thank all for the help, I had been fighting it all 3 day weekend. My car has 240k miles on it. I am an Uber driver and I have two hhr's. Everyone who helped is wonderful. I am not afraid to complete this prodject! I am sure I will have more questions later. Most I find answers quickly here. Thanks again!😃
Old Jul 5, 2016 | 06:37 PM
  #29  
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Get into the wayback machine and look at the attachment in post #3. that's for VVT
Old Jul 5, 2016 | 06:46 PM
  #30  
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So the exhaust cam gear and the crank gear get the matching links and the intake cam gear gets the unique link.

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