how do you tell the right from left
 

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Perhaps these will help-

1-4:

https://webfiles.uci.edu/redwards/pu...installed..JPG5-8:


https://webfiles.uci.edu/redwards/pu...installed..JPG

Be careful when connecting the oil feed lines. They appear to fit both ways, but they don't. If it feels just a little bit off, flip it and try again.... (don't ask how I know LOL)..

Look at the photos in an old post of mine. Shift+Click any photo for way higher resolution version.

Note that the right side tensioner (with the countersinks for the mounting screws facing up, as it's mounted) has piston side up, while the left side tensioner (with the countersinks for the mounting screws facing up, as it's mounted) has piston side down.

Here are the same photos lifted from that post:

Right-side tensioner with new pads:

http://lh4.ggpht.com/_T5A7537WhI4/TJ...0-09-0392a.JPG

Left-side tensioner with new pads:

http://lh3.ggpht.com/_T5A7537WhI4/TK...0-09-0398a.JPG

The asymmetry of the pipes that Tom mentioned in the previous post is captured by this photo (at least for the right side; can't remember if the left side was the same and don't have any photos, unfortunately).

http://lh4.ggpht.com/_T5A7537WhI4/TJ...0-09-0387a.JPG

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The easier way to remember which is which is to look at the rotation of the engine.

The piston is always on the slack side side of the timing chain.
So if you look at the rotation you can easily see which is which.
If you reverse them you already know what happens.