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

Timing chain issues

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Old 07-04-2016, 05:20 PM
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Timing chain issues

I am trying to put my heads back on after replacing a bad exhaust valve. My problem is that a PO (previous owner) has put in a timing chain kit from Rock Auto. I know this because the picture on line shows the same chain markings. It has three black links one is flanked on either side by a copper link. It would be nice to know how many links between so I would know which one to use on the intake cam. I have tried all three and I cannot get a clear feeling. As I rotate by hand they never line up again. There appears to be only one position that feels like something is hitting. I have watched lots of videos on YouTube. They all use a chain with only three colored links. If any one could help I am at my wits end. It shouldn't be this hard!
2011 2.4l

Thanks

Last edited by Scorangehhr; 07-04-2016 at 05:21 PM. Reason: Forgot to tell engine type
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Old 07-04-2016, 05:52 PM
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Wow. That may be a tough one to find an answer to. Not sure if anyone has ever bothered to count the number of links between the marks.
Hopefully someone has one torn down and can get you a count.
Or, better yet, maybe someone has their old factory chain laying around and could help you out.

Last edited by firemangeorge; 07-04-2016 at 06:38 PM.
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Old 07-04-2016, 06:57 PM
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It only goes on one way. 2 go to the cam shafts and 1 goes to the crankshaft.

The crankshaft TDC mark is NOT at the top. It is at about 5o'clock. That is probably the specially marked link.

Here is the abridged procedure:
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Old 07-04-2016, 07:48 PM
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Thanks Don, I'd been trying to find that diagram, but you beat me to it...as always.

Folks, there's a reason donbrew is our Technical Moderator, he's got a brain the size of a planet.
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Old 07-04-2016, 08:16 PM
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If the total number of links are correct in Donbrews picture, this is the count I got of the links between the marks.

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Old 07-04-2016, 09:22 PM
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It only fits 1 way. Don't over think.

3 marks 3 marked links.
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Old 07-04-2016, 10:25 PM
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donbrew, do the timing marks on the balance shaft set need to align also?
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Old 07-05-2016, 06:51 AM
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This help

Timing Chain Service Procedures GM 2.2L L61 Ecotec, Camshaft Sprocket

Maybe this video

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Old 07-05-2016, 07:16 AM
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Originally Posted by RJ_RS_SS_350
donbrew, do the timing marks on the balance shaft set need to align also?
Yes, but that's the other chain.
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Old 07-05-2016, 07:32 AM
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Nice video find Steve.

One thing I've always done with timing chain replacements on any engine. I will give the components a light coat of clean engine oil right before putting the covers back on.
Just to make sure it's lubricated for that initial startup.
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