Serpentine Belt-- Updated Thread, Clewitt System Install Photos Options

[Robarabian]

Ok, here is my stab at an installation thread.

1) I am a home mechanic, not the Red Barn. Please be constructive, I am sure there are several better ways, but this is what I did and it works... at least so far.

2) You will see a red fan and a silver fan. I had to switch them in the end, for alignment purposes. I haven't figured out why yet.

3) I love the way it turned out.

Here goes nothing...:

You start by removing your pulleys from both the fan and the crank. The crank one goes on easy, and I used a new bolt that I bought with the kit from Clewitt.


The instructions say to make sure there are no burrs on your fan. This is important. It was a tight fit, I ended up doing a bit of sanding and cleaning up the fan pulley area to get the Clewitt pulley to fit on and off. It says you can use shims to make sure everything is straight.

I used my 911 cam chain straight edge that I got from Stomski Racing to line up the pulleys.

Once you know they are in alignment, you need to mount the tensioner. In my case, I had to fabricate a bracket. On the left side, the tins would be in the way on my particular engine. I used the right side mount bolt.

Note: Clewitt's tensioner is on an eccentric, so it can be tensioned from either side, it is a universal as far as that goes. It works at about any angle.

I used a beefy angle mount I had, and a piece of straight / flat bar. After measuring it up, I mig welded both sides, and ground em down a bit since I am not a super welder.

I drilled the mounting holes and mounted it up. Once it is in place, I fiddled with where I wanted it. I notched my angle mount so it would sort of catch my engine mount and lock into place to avoid any rotation due to tension. I got lucky here.

After test fitting it and tensioning it, I shortened one end and then painted it black. Clewitt pre-threads it, so I noticed the tensioner wasn't in perfect alignment. I used a few washers between the mount I made and the tensioner to shim it forward slightly and it popped into perfect alignment.

It looks pretty slick and the belt change is as simple as loosening the eccentric bolt, rotating the tensioner either direction and removing the belt. You re-tension it and allow for 1/4 inch deflection. Richard Clewitt said not to over tension it, or you can either put wear on the alternator bearing or the tensioner, but he said it is designed that the tensioner will fail before an alternator bearing. Replacements are pretty cheap.

You shouldn't have to fabricate anything if you are using the Rich Johnson type mount, as it has the provisions for the tensioner to bolt directly to. This is just what I had to do.

See photos.

[live free & drive]

The Naro mount puts the engine 1/2” closer to the firewall

[mb911]

The Naro mount puts the engine 1/2” closer to the firewall

And also lower in the chassis so the engine seal doesn’t seal. Not a fan of that mount for those 2 reasons

[Montreal914]

The Naro mount puts the engine 1/2” closer to the firewall

And also lower in the chassis so the engine seal doesn’t seal. Not a fan of that mount for those 2 reasons

@live free & drive , @mb911

These are two very good piece of information. (IMG:style_emoticons/default/smilie_pokal.gif) I was wondering about how to know/set the mount to ensure the engine is precisely where it is supposed to be. (IMG:style_emoticons/default/sad.gif)

I guess one could bring the engine in the bay but that is quite an undertake. Are there any rereference points/distances that can be measure between engine and chassis that could help this engine mount positioning without the use of the actual engine?

Is there anything preventing shiming out the base of the Naro engine mount away from the firewall? Abeit 1/2" is a lot! (IMG:style_emoticons/default/blink.gif)

Is there anything preventing the mount to be installed higher so the tin can settle properly with the chassis seal?

I can't see my installation not fitting properly in that seal, this will not look right in my book. (IMG:style_emoticons/default/dry.gif)

Thank you for the input, sorry for the small drift in OPs thread. (IMG:style_emoticons/default/unsure.gif)
The Clewitt upgrade seems really nice but a few picture examples of 914s integration would be helpfull. Obviously designed for the 911 rear engine configuration, seems trickier on 914s especially with the various engine mount options on the market.