crankshaft pulley hole size

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FaanP
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crankshaft pulley hole size

Post by FaanP » Sat Apr 14, 2018 6:21 pm

Hi,

Can anybody please tell me what is the size of the hole where the threaded part of you crank pulley goes in? Mine is 50,5mm and my threads on the pulley is 50mm. Is this my hole size correct or to big?

It is a 1600 TP



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fourier
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Re: crankshaft pulley hole size

Post by fourier » Sat Apr 14, 2018 8:24 pm

Did a quick check on my engine casing. It measures 50.03mm.

At 50.5mm, you will probably end up with a bad oil leak.
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Re: crankshaft pulley hole size

Post by FaanP » Sun Apr 15, 2018 6:11 am

fourier wrote:
Sat Apr 14, 2018 8:24 pm
Did a quick check on my engine casing. It measures 50.03mm.

At 50.5mm, you will probably end up with a bad oil leak.
Thank you Sir ... and that is exactly the problem. The question now is how do fix it? I can't seems to find 50.5 mm Crank pulley

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Tony Z
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Re: crankshaft pulley hole size

Post by Tony Z » Sun Apr 15, 2018 7:54 am

VW did make a bigger pulley for the 0.5mm bigger hole.... you just have to dig through old spares until you find one

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Re: crankshaft pulley hole size

Post by FaanP » Sun Apr 15, 2018 8:47 am

Tony Z wrote:
Sun Apr 15, 2018 7:54 am
VW did make a bigger pulley for the 0.5mm bigger hole.... you just have to dig through old spares until you find one
I have a old aluminium pulley. Will it possible to get it welded up and machined to the correct size?

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Tony Z
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Re: crankshaft pulley hole size

Post by Tony Z » Sun Apr 15, 2018 8:49 am

anything is possible with the right amount of money
I'd rather suggest a sandseal pulley approach - this has a seal which you insert into the case and the pulley has a stainless ring on it to prevent wearing on the seal

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Re: crankshaft pulley hole size

Post by Tony Z » Sun Apr 15, 2018 8:50 am

and then, who is going to cut the thread correctly????

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Re: crankshaft pulley hole size

Post by fourier » Sun Apr 15, 2018 8:43 pm

Tony is correct, VW made oversized pulleys (111 105 253B) to solve this problem, but good luck finding one...

Easiest fix, is probability the sand seal route. You may need a custom OD seal holder to fit into the case ID, and a sleeved pulley as Tony suggested. This will be much cheaper than having a custom pulley made, to fit your case.
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Re: crankshaft pulley hole size

Post by slak » Mon Apr 16, 2018 8:04 am

Best is to get in touch with Bennie(VW Oldies) in Vereeniging and ask him if he might have one for U he has alot of parts
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Re: crankshaft pulley hole size

Post by FaanP » Mon Apr 16, 2018 3:37 pm

Thank you all for the help. I found 0.5mm oversize pulley with the help of the friendly guys at volksieworld. Hope that it will mean the end of my oil leak.

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Re: crankshaft pulley hole size

Post by fourier » Mon Apr 16, 2018 4:29 pm

Glad you found the correct pulley! Let us know if it solved your problem.
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