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Old 01-12-2020, 03:53 PM   #49
can0fspam
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Join Date: Mar 2019
Location: South Carolina
Posts: 58

1999 SL2
Default Re: Unknown engine noise when cold

We've got an update:
I pulled the valve cover again and checked for tension in the chain up top as well as down inside the timing cover.
There was significant enough play up top, and the chain was almost completely loose below the front cam gear.
Below the back cam gear, it was fully tight. This makes sense - I think the tensioner is on this side.
However this seems bad enough to me that I will put a new chain in it ASAP. There's enough movement around the front gear that it wouldn't be hard to jump a tooth.

Video (let me know if the quality is too poor):
https://www.youtube.com/watch?v=AEaEwo_BXxs

Unless this amount of play is in-spec, I think this tells me all I need to know about the condition of the chain/tensioner.
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