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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Catastrophic camshaft and follower failure - any ideas?
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<blockquote data-quote="macvette" data-source="post: 6003" data-attributes="member: 262"><p>Hi, This thing about slow idle speed and kicking the engine over without running it rang a bell with me</p><p>Some years ago I rebuilt the engine in my old car (see avatar). It's V8 ohv pushrod so there are some similarities although the cr is 11.25 to 1!</p><p>I put an Edelbrock camshaft in and I just dug out the instructions (no I'm not an anorak). They are very adamant on two points. You MUST use the special start up lubricant supplied with the cam, I think it's MOS2 by what's left of it and you MUST NOT allow the engine to run below 2000 rpm for the first half an hour. The instructions contain the warning that slow idle speed on first start up will cause severe cam and lifter wear. They don't give any explanation of why this is so. Edelbrocks are well known and unlikely to suffer from manufacturing/ metallurgical inconsistency so whilst this doesn't rule out these factors in the case of the Vincent engine here, it does point up the possiblity that lubrication and slow running on start up were contributing factors.</p><p>Regards Mac</p></blockquote><p></p>
[QUOTE="macvette, post: 6003, member: 262"] Hi, This thing about slow idle speed and kicking the engine over without running it rang a bell with me Some years ago I rebuilt the engine in my old car (see avatar). It's V8 ohv pushrod so there are some similarities although the cr is 11.25 to 1! I put an Edelbrock camshaft in and I just dug out the instructions (no I'm not an anorak). They are very adamant on two points. You MUST use the special start up lubricant supplied with the cam, I think it's MOS2 by what's left of it and you MUST NOT allow the engine to run below 2000 rpm for the first half an hour. The instructions contain the warning that slow idle speed on first start up will cause severe cam and lifter wear. They don't give any explanation of why this is so. Edelbrocks are well known and unlikely to suffer from manufacturing/ metallurgical inconsistency so whilst this doesn't rule out these factors in the case of the Vincent engine here, it does point up the possiblity that lubrication and slow running on start up were contributing factors. Regards Mac [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Catastrophic camshaft and follower failure - any ideas?
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