YotaTech Forums - 22RE passenger side timing chain guide clack

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22RE passenger side timing chain guide clack

hey so for a while my 92 pickup had developed an intermittent knock. I've been inside the timing cover a handful of times to diagnose but never found a smoking gun. The knock has since gotten progressively worse and is now a clacking. Went into the valve cover again because it sounded like a loose valve. That's when I notice the passenger side chain guide (side with the tensioner) has a fair amount of slop between it and the upper bolt. See video below.
This cant be normal right? I can get a 12mm wench down on that upper bolt and it's tight! Yet there's still slop in the guide, like it's worn down.
Part of me wants to back that bolt off a turn or two and get a shim down between it and the guide.

I know the drivers side guide is problematic when they're the plastic kind, but that one is the updated metal-backed kind. Other side is plastic and I've not heard of these being an issue.

Heres a video of the guide slopping around when I move it with my finger. You can see the bolt below remaining stationary while the guide moves underneath it.

It looks like the bolt that hold that guide in place either fell out or is loose. The guide should not move at all. If the timing set has a more than 100k on it I would just replace all of it.

There is no reason to guess where a sound eminates from

https://cimg6.ibsrv.net/gimg/www.yot...27a8953f09.jpg

Random image from Google..

See the slot at to top of the slackside guide?

You a mechanics stethoscope, it's right up there at the top of the must have tools for diagnosis.

Was the timing chain replaced before? Maybe it's time to remove the timing chain cover and see what's going on.

This a weird one for sure.

You mentioned that the top bolt is tight. You sure that bolt is flush with the top of the guide? The bolt that is installed could be too long. See if you can get something thin under that top bolt like a feeler gauge or something.

One possibility I can think of that if the chain was replaced and the top bolt was cross threaded and tightened to torque specs but not gripping the guide. Hope that's not true in this case.

Could call up LCE or Putney, ask them to check one they have on a build stand. But I'm pretty sure they are supposed to not be firmly afixed on the one end..

A much more important piece that would cause a clatter in that area is the tensioner itself, once the rubber goes they get real loud then explode (not dramatic, actually explode into several pieces). This will ruin lots of parts you don't want to have yo replace if it can be avoided.

Again, be sure where your noise is before you dive in. Use a stethoscope, a long screwdriver. I like a nice long wooden dowel myself, it keeps your hands out of the way, doesn't conduct heat

Quote:

Originally Posted by Co_94_PU (Post 52407101)

Could call up LCE or Putney, ask them to check one they have on a build stand. But I'm pretty sure they are supposed to not be firmly afixed on the one end..

Update.. Had the valve cover off for maintenance this weekend. It moves, not an issue unless it's broken in which case it's not just shifting but rotating.