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Lotus Europa Forums => Garage => Topic started by: Bart on Wednesday,January 15, 2020, 07:22:43 AM

Title: Cam Shaft Pulley
Post by: Bart on Wednesday,January 15, 2020, 07:22:43 AM

Good morning all,

I need to buy/make a cam shaft pulley that turns the belt to drive the alternator, as I don't have the original pulley I was hoping someone could let me know its outside diameter and belt section/profile. I wanted to use an aluminium pulley to reduce the rotating mass, RD has them on their site but has no stock or plans to get more and Banks only have a 4" diameter one that will turn the alternator too slowly (or at least slower that the original).

I measured the shaft and its 7/8ths with a keyway, McMaster has a cast aluminium pulley at 4-5-6-7" OD for a 7/8ths shaft that will take 3L or 4L section belts not sure this is suitable or will work...

As usual thanks for any help.

Title: Re: Cam Shaft Pulley
Post by: Pfreen on Wednesday,January 15, 2020, 08:10:35 AM

Bart,

I assume you have a twincam engine.

I have an oem pulley I am willing to part with.  It is 7” in diameter and has a keyway in the approximately 7/8” bore to fit the cam.   An off the shelf pulley will need some machining to fit on the cam properly.

Let me know.

Title: Re: Cam Shaft Pulley
Post by: BDA on Wednesday,January 15, 2020, 09:05:46 AM

There was a guy on the yahoo group who made them for several TC owners. He did a great job. He even made a custom one for my engine (see attached photo). I don't know if he's still doing them but you can email him at markdinkens2000 at yahoo dot com.

Title: Re: Cam Shaft Pulley
Post by: literarymadness on Wednesday,January 15, 2020, 09:55:51 AM

There is also a used one on ebay for $29.98

https://www.ebay.com/p/1525180772?iid=312811471085&chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=312811471085&targetid=858506155824&device=c&mktype=pla&googleloc=9051808&poi=&campaignid=8080423831&mkgroupid=85786197301&rlsatarget=pla-858506155824&abcId=1139446&merchantid=6296724&gclid=Cj0KCQiAjfvwBRCkARIsAIqSWlOb0Ofg3dr6asL2cIEfQibEEstMs0M-7nhAPhVzvhYTBEpqEbWkmcIaAodpEALw_wcB

Title: Re: Cam Shaft Pulley
Post by: EuropaTC on Wednesday,January 15, 2020, 01:41:41 PM

Aren't the aluminium ones for the crankshaft, the ones at the front of the engine driving the waterpump ?

Brian

Title: Re: Cam Shaft Pulley
Post by: jbcollier on Wednesday,January 15, 2020, 02:02:40 PM

The link to the aluminium pulley is indeed for a crankshaft pulley.  The top link is to the pulley he is looking for.

Title: Re: Cam Shaft Pulley
Post by: literarymadness on Wednesday,January 15, 2020, 02:39:12 PM

I removed it. Sorry My mistake!