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Harley davidson troubleshooting?

Asked Sep 11, 2010, 12:27 PM — 3 Answers
I have a 1993 evo motor making a loud tapping noise when engine is warmed up, no performance loss or smoke

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cdad's Avatar
cdad Posts: 11,115, Reputation: 6615
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#2

Sep 11, 2010, 12:33 PM
Could be a valve tappet. And your just being lucky its staying alaigned. Have you checked that yet?
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twinharleys Posts: 2, Reputation: 10
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#3

Sep 11, 2010, 12:45 PM
Comment on califdadof3's post
Quote:
Originally Posted by cdad View Post
Could be a valve tappet. And your just being lucky its staying alaigned. Have you checked that yet?
I checked lifters and push rods all seem normal
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cdad's Avatar
cdad Posts: 11,115, Reputation: 6615
Internet Research Expert
  
#4

Sep 11, 2010, 01:31 PM
Is the sound coming from the top end? Have you been able to identify where its coming from? You can use a long screwdriver and hold the tip to various parts of the motor while its running and it should change how loud it gets when holding the other end to your ear. The other possibility is a wristpin is rattling around. Or your rod is coming loose. If its loud its serious.
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