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Blog: "replacing Cam belt on Esprit S2 1978" - Engine/Ancilliaries - The Lotus Forums #ForTheOwners Jump to content


Blog: "replacing Cam belt on Esprit S2 1978"


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Excellent post, thank you :)

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Well done Mark. It's an entertaining job but gets easier after the first time!

I use one of these to tension the cambelt 50-55lb for the standard belt

https://www.ebay.co.uk/itm/Gates-91107-Krikit-I-V-Belt-tension-gauge-tool/253218257274?epid=21017021517&hash=item3af4fbf97a:g:eqQAAOSwNchZ6j9- 

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  • 2 weeks later...
On 01/06/2018 at 14:50, Widget said:

With the new belt, I transferred the marks over from the old belt making sure that the “direction” of the belts matched.

Do the belts have a direction? I wasn't aware that they did.

Lotus Esprit [meaning] a 1:1 scale Airfix kit with a propensity to catch fire

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I have seen some belts with direction of rotation marks, always three little arrows.

Most things are clockwise thankfully bar Honda engines.

The main thing I check on a new Cambelt is I count the old teeth on the old belt and count the teeth on the new belt to make sure they are the same !

More often when using non gen, you can be surprised how parts people can mix up, give you totally the wrong part.

A

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31 minutes ago, silverfrost said:

I have seen some belts with direction of rotation marks, always three little arrows.

Most things are clockwise thankfully bar Honda engines.

The main thing I check on a new Cambelt is I count the old teeth on the old belt and count the teeth on the new belt to make sure they are the same !

More often when using non gen, you can be surprised how parts people can mix up, give you totally the wrong part.

Sure but I've not seen them on a 907 belt?

Lotus Esprit [meaning] a 1:1 scale Airfix kit with a propensity to catch fire

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On 19/06/2018 at 09:21, Paul Coleman said:

Do the belts have a direction? I wasn't aware that they did.

Here is a pic of the new belt with arrows pointing to the front of the engine. I dug the old lotus supplied belt out of the bin and there are no direction markings, however the text would be the right around if you were standing in front of the engine. I have always assumed that flat belts have a direction, guessing that when made, the belt would be layered in a kind of spiral and then cut to width so the layers would either naturally tighten or loosen in use. I have no idea if that is fact, just kind of feels right.

DSC_0168.jpg

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  • Gold FFM

There is no direction.  But it's handy if you intend to reuse the belt.

However, I always try to fit with the arrows in the right orientation as owners get very nervous about it!

British Fart to Florida, Nude to New York, Dunce to Denmark, Numpty to Newfoundland.  And Shitfaced Silly Sod to Sweden.

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What is considered the front of the engine.  Coincidentally I put a cambelt on yesterday but the engine is out and on a stand.  I put the arrows pointing to  the front of the car as if the engine was fitted.

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11 hours ago, Steve4012 said:

It says on the gates website there is no direction. The arrows are simply an aid to line up with pulley markings.

https://www.gatestechzone.com/en/news/2017-03-direction-of-belt-rotation

Thanks Steve, there is the definitive answer! I think when I do this job again, I will follow convention as I know it would bug me seeing arrows pointing the wrong way and I would still have a tints y-wintsy amount of irrational doubt every time I see it😃

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11 hours ago, PhilW said:

What is considered the front of the engine.  Coincidentally I put a cambelt on yesterday but the engine is out and on a stand.  I put the arrows pointing to  the front of the car as if the engine was fitted.

Good point! I have looked around on the internet and can't find a specific convention. However I was taught that the front of the engine is where piston one is and according to the Lotus-Big-Black-Book-Of-Curiosity this is the one nearest the water pump.

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  • 2 years later...

the strange thing is, at a Excel/Elite/Eclat you take a look to the front of the Cams "marks/dots"

and by a esprit you take a look from behind 😉

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