Lotus Elan

Crankshaft pulley size

PostPost by: ericbushby » Fri Apr 06, 2012 6:36 pm

Hello,
Am I seeing things or what. I am just ready to put the engine back in my Series 3 and I saw that the pulley covers the timing marks. I didn`t notice this when I was setting the timing but that is done from a different angle. The pulley outside diameter is 4.75". When I look in various books the timing marks are clearly visible from the front.
Has this engine got the wrong pulley on. Please will someone tell me the correct diameter for this pulley.
I`m puzzled
Eric in Burnley
1967 type 45 S3SE (off the road)
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lotus crankshaft pulley.jpg and
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PostPost by: nebogipfel » Fri Apr 06, 2012 6:42 pm

Evening Eric,

I don't recognise what you have there but it's certainly not a standard twincam pulley

The standard pulley is smaller and doesn't have the holes around it

http://qedmotorsport.co.uk/qed-shop/vie ... ft%20pully
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PostPost by: ericbushby » Fri Apr 06, 2012 6:53 pm

Thankyou John,
Now you have confirmed that it is wrong I can correct it.
Every time I put one thing right on this car, I find two others which need sorting out. It must be getting better, musn`t it?
Eric in Burnley
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PostPost by: nebogipfel » Fri Apr 06, 2012 7:02 pm

ericbushby wrote:Thankyou John,
Now you have confirmed that it is wrong I can correct it.
Every time I put one thing right on this car, I find two others which need sorting out. It must be getting better, musn`t it?
Eric in Burnley



Don't fret Eric, you own one of the best cars in the world :wink:
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PostPost by: Mazzini » Fri Apr 06, 2012 7:44 pm

Isn't that a pre-xflow pulley?
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PostPost by: MickG » Fri Apr 06, 2012 8:19 pm

Just measured my spare and it's 4 inches Dia.
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PostPost by: ericbushby » Fri Apr 06, 2012 11:11 pm

Hello Mick
Thanks for that. It confirms what John said and gives me detail as well. I will now go ahead with confidence.
I will update when it is replaced.
Eric in Burnley
1967 Type 45 S3SE (off the road)
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PostPost by: bast0n » Sat Apr 07, 2012 12:25 pm

Eric - from what little I can see of it your waterpump pulley looks enormous. Worth checking that whilst you are at it.
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PostPost by: ericbushby » Sat Apr 07, 2012 3:43 pm

Thankyou David,
Thewater pump pulley is 4.25" outside diameter and while we are here the alternator pulley is 2 9/16 "or 65mm if that reads better on the page.
Can you say if they are right? I don`t trust anything anymore.
Regards
Eric in Burnley
1967 S3SE Type 45 (not running)
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PostPost by: bast0n » Sat Apr 07, 2012 3:52 pm

Eric

I have just measured my spare water pump pulley and it is 4 and a quarter so something looks right!!

Good luck and keep going - it is worth it :D
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PostPost by: ericbushby » Sat Apr 07, 2012 4:37 pm

Thankyou David, John, Mazzini and Mick,
This forum is brilliant. If you can`t find it in the books it seems you just have to ask and you usually get an answer.
Regards
Eric
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PostPost by: ericbushby » Sun Apr 15, 2012 5:51 pm

Update,
Correct pulley bought on ebay and fitted. I changed the front oil seal while I was there.
Thanks for your help. I just need a shorter fan belt now!
Engine going back in.
Eric in Burnley,
1967 S3SE Type 45 (up on stands, until next week.)
Brian Buckland says the engine will come out in two hours. His book is essential and brilliant but I wonder how long it took him the first time.
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