Top end noise - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 7 (permalink) Old 06-19-2017, 08:26 AM Thread Starter
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Top end noise

I bought a 83 shovelhead with less than 2k miles. When I got it I changed the oil just as a precaution. Shortly after I developed a top end noise and it doesn't want to take throttle. I'm guessing I have a collapsed lifter? Is this a common problem?

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post #2 of 7 (permalink) Old 06-19-2017, 09:49 AM
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Collapsed lifters are usually from crud getting inside them and with only 2K on the odometer it shouldnt have been too dirty even if the oil broke down from age. Im curious how the old oil was and how old it was too.
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post #3 of 7 (permalink) Old 06-19-2017, 10:08 AM Thread Starter
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Originally Posted by naknekpete View Post
Collapsed lifters are usually from crud getting inside them and with only 2K on the odometer it shouldnt have been too dirty even if the oil broke down from age. Im curious how the old oil was and how old it was too.
The oil looked good, recently changed. I was thinking since the bike sat more than not, if the lifter got dried out. Is there a seal of some sort that could've gone bad?
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Originally Posted by naknekpete View Post
Collapsed lifters are usually from crud getting inside them and with only 2K on the odometer it shouldnt have been too dirty even if the oil broke down from age. Im curious how the old oil was and how old it was too.

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post #4 of 7 (permalink) Old 06-19-2017, 02:43 PM
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The oil looked good, recently changed. I was thinking since the bike sat more than not, if the lifter got dried out. Is there a seal of some sort that could've gone bad?



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Not that I recall but its been a long time since I had one apart. They have very small oil passages that are usually the problem but its also not unknown for one to break a spring.
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post #5 of 7 (permalink) Old 06-20-2017, 07:59 AM Thread Starter
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Update. I tore it down and found one lifter collapsed. Are these serviceable or should I just replace it? Any suggestions on brand names for a replacement?

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post #6 of 7 (permalink) Old 06-20-2017, 09:39 AM
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Replace them. S&S sells very good products.

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post #7 of 7 (permalink) Old 06-20-2017, 09:52 AM
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Kind of spendy but S&s had a kit to change over to the evo lifters which are much more reliable
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