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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Oil Filter Woes
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<blockquote data-quote="davidd" data-source="post: 39220" data-attributes="member: 1177"><p>Martyn,</p><p></p><p>I have written about this before, but it must be over a decade. The casting at the base of the Comet oil filter is not as consistent as that of the twin. It varies quite a bit. On my racer the width of the circle that the paper element rests on is zero at one point, thus there is no seal. I considered a different paper element that could seal on a spindle and custom making the oil fitting, but it was too much work when I could simply use the original rag filter that seals on the floor of the oil chamber rather than the unreliable pad surrounding the oil fitting. I concluded that the paper element filters were not suitable for singles without some investigation. </p><p></p><p>Having never run the paper element I did not continue to investigate the width of the filter which you have done so well. I would argue that the best paper element filter should mimic the rag filter and seal on the floor of the oil chamber. This would allow the filter to always seal properly and would additionally resist crushing very well. This would in turn make the sealing at the cap much easier. </p><p></p><p>I presume that your leak might be caused by the lack of proper seating of the cap due to the excess length of the filter? I have never used sealer on the cap and I have no leaks so I see the cap as a reasonably reliable sealer in a stock application.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 39220, member: 1177"] Martyn, I have written about this before, but it must be over a decade. The casting at the base of the Comet oil filter is not as consistent as that of the twin. It varies quite a bit. On my racer the width of the circle that the paper element rests on is zero at one point, thus there is no seal. I considered a different paper element that could seal on a spindle and custom making the oil fitting, but it was too much work when I could simply use the original rag filter that seals on the floor of the oil chamber rather than the unreliable pad surrounding the oil fitting. I concluded that the paper element filters were not suitable for singles without some investigation. Having never run the paper element I did not continue to investigate the width of the filter which you have done so well. I would argue that the best paper element filter should mimic the rag filter and seal on the floor of the oil chamber. This would allow the filter to always seal properly and would additionally resist crushing very well. This would in turn make the sealing at the cap much easier. I presume that your leak might be caused by the lack of proper seating of the cap due to the excess length of the filter? I have never used sealer on the cap and I have no leaks so I see the cap as a reasonably reliable sealer in a stock application. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Oil Filter Woes
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