I just spent about 45 minutes reading applicable portions of my FSM and studying the time chain related diagrams.

Although I'm not done with my preliminary (aka "in my own garage") investigations related to what I think is timing chain clatter, I'm trying to prep myself for that being case.

If this turns out actually be a timing chain issue, I thought I might go ahead and replace the timing chain tensioner(s) myself to see if that might remedy the situation.

However, I want to confirm couple/few things before I continue:

As far a "timing chain tensioner" goes ... we only have one (1), correct?

Based on my reading and diagram study we've got four (4) timing chain guides; two (2) camshaft chain tensioners; and a single (only one) actual timing chain tensioner that applies tension to the slack side chain guide only.

Also, the timing chain tensioner can be accessed and replaced through the "chain tensioner cover" with the motor still in the car and with the removal of pretty minimal other components?

I know this all might sound a little silly but I'm wanting to confirm real life information with what I think I'm reading and seeing in the FSM.

 

Everything you said is correct. However, I heard it is kinda difficult to replace the tensioner through that access port but it can be done. If you do a search you will find lots of instructions and how to's regarding replacing it. Just be very careful you don't drop something inside the timing cover or you may have to remove the timing cover if you can't get it back out with a magnet. That requires a lot of work.

 

I've heard that it usually isn't the tensioner but the guide, and that requires taking off the TC cover which is quite a job. Logically you'd replace the water pump at the same time.

 

Yeah ... I know ... but I thought I might try a new tensioner first before tackling the "huge" job in off chance that that might be the issue.

The water pump was changed out about 18 months ago.