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EarlyBay Forums
Technical
Scat bottom pulley Problem!
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<blockquote data-quote="matt-me" data-source="post: 435470" data-attributes="member: 3817"><p>I think the old scat pulleys had a slight raised 1.5mm or so lip both sides of the pulley. I had a newer one (bought about 5 years ago) fitted and it didn't have this lip, so it pulled closer to the block. This was kept and used when i had a new engine built. </p><p></p><p>All good for a while but over time my engine developed this 'ticking' noise, especially at low revs. It was found that due to this lack of 'lip' the pulley loosened very slightly and had caused a very slight movement on the woodruff key, hence the noise. Pulley chucked in the bin, older model with lip found by builder and used. No problems found. No damage done but i was worried for a while and it would only have got worse.</p><p></p><p>So keep an eye on these pulleys without the raised lip. I think the fact the lip was not there, whilst it seemed to tighten up, it wasn't quite 'proper' tight if you know what i mean.</p><p></p><p>Al</p></blockquote><p></p>
[QUOTE="matt-me, post: 435470, member: 3817"] I think the old scat pulleys had a slight raised 1.5mm or so lip both sides of the pulley. I had a newer one (bought about 5 years ago) fitted and it didn't have this lip, so it pulled closer to the block. This was kept and used when i had a new engine built. All good for a while but over time my engine developed this 'ticking' noise, especially at low revs. It was found that due to this lack of 'lip' the pulley loosened very slightly and had caused a very slight movement on the woodruff key, hence the noise. Pulley chucked in the bin, older model with lip found by builder and used. No problems found. No damage done but i was worried for a while and it would only have got worse. So keep an eye on these pulleys without the raised lip. I think the fact the lip was not there, whilst it seemed to tighten up, it wasn't quite 'proper' tight if you know what i mean. Al [/QUOTE]
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Scat bottom pulley Problem!
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