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Title: Crankshaft Pulley - S3 Beta 1600 HPE Post by: A1.6HPE 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 Title: Re: Crankshaft Pulley - S3 Beta 1600 HPE Post by: peteracs on February 09, 2023, 08:55:56 PM Hi
The nut is definitely normal thread, never seen a bolt. Peter Title: Re: Crankshaft Pulley - S3 Beta 1600 HPE Post by: Nigel 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 Title: Re: Crankshaft Pulley - S3 Beta 1600 HPE Post by: A1.6HPE 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 Title: Re: Crankshaft Pulley - S3 Beta 1600 HPE Post by: A1.6HPE 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 Title: Re: Crankshaft Pulley - S3 Beta 1600 HPE Post by: peteracs 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 Title: Re: Crankshaft Pulley - S3 Beta 1600 HPE Post by: A1.6HPE 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 Title: Re: Crankshaft Pulley - S3 Beta 1600 HPE Post by: A1.6HPE 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 |