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Author Topic: Crankshaft Pulley - S3 Beta 1600 HPE  (Read 998 times)
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A1.6HPE
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« on: February 09, 2023, 08:34:11 PM »

Hello all,
About to tackle a timing belt change on my Series 3 1600 Beta HPE (long bumpers and power steering).

I have got it into my head that some crankshaft pulleys have a bolt fitting and some have a nut fitting and that one type is a left-hand thread.
Perhaps I am thinking about Delta engines having a bolt?
I have this aide-memoire in my mind that Nut = Normal and BoLt = left-hand thread.

Can anyone give a definitive verdict on my troubled thoughts? 

Photograph of this nut on my car engine is attached.

TIA, Leo




* Crankshaft_Pulley_1.jpg (98.91 KB, 792x756 - viewed 191 times.)
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peteracs
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Peter Stokes


« Reply #1 on: February 09, 2023, 08:55:56 PM »

Hi

The nut is definitely normal thread, never seen a bolt.

Peter
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Beta Spyder S2 pre F/L 1600
Beta HPE S2 pre F/L 1600
Nigel
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« Reply #2 on: February 09, 2023, 10:52:31 PM »

Leo,
You don't need to disturb that to change the belt. It's fiddly
to work the belt gently past the 'safety' guide, but
perfectly do-able.
Unless there's another reason....

Nigel
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1984 2.0 Carb HPE [ex Aus] Grigio Finanza.
2007 Mazda 6 2.3 [current daily, highly recommended]
The past:
1980 2.0 HPE White in South Africa [hope it survives!]
1976 1.6 Coupe Lancia Blu [PFG 76R] [probably deceased]
oh,and an Uno Turbo 1997 also in SA [stolen,never recovered]
A1.6HPE
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« Reply #3 on: February 11, 2023, 03:40:24 PM »

Hi

The nut is definitely normal thread, never seen a bolt.

Peter

Cheers Peter, thank you for your response.

Leo
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A1.6HPE
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« Reply #4 on: February 11, 2023, 03:41:44 PM »

Leo,
You don't need to disturb that to change the belt. It's fiddly
to work the belt gently past the 'safety' guide, but
perfectly do-able.
Unless there's another reason....

Nigel

Cheers Nigel,
I believe that "best practice" is to remove the pulley.

Leo
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peteracs
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Peter Stokes


« Reply #5 on: February 11, 2023, 04:52:46 PM »

Hi Leo

As Nigel says, it is possible, but having done both ways, I prefer to take the pulley off.

Peter
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Beta Spyder S2 pre F/L 1600
Beta HPE S2 pre F/L 1600
A1.6HPE
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« Reply #6 on: February 12, 2023, 12:56:58 AM »

Hello Peter,
Agreed, I feel its best to remove the pulley so that removing old and fitting the new belt does not disturb anything. I know that a lot of people/garages simply cut the old belt but again, I prefer to reduce the risk of disturbing the pulley alignments once set up.

Each to their own of course, we all have our own way of working.

Leo
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A1.6HPE
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« Reply #7 on: March 07, 2023, 12:36:31 AM »

Just to round off this conversation, I removed the nut today and as above it is a normal thread and therefore released by anti-clockwise rotation.

Leo

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