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  #1  
Old 10th November 2019
DitchTBHSMM DitchTBHSMM is offline
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Default diagnose noise in engine after rebuild

2003 sportster 1200 - now a 1275. i just got it all back together and have a sound that has not gone away after 5 heat/cold cycles with this mornings run being the longest at 40 seconds. Anyone know what this noise is? How long does it take engine to run/warm up for oil to get everywhere it needs to be? i guess i cannot post video.
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Old 10th November 2019
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Quote:
Originally Posted by DitchTBHSMM View Post
Anyone know what this noise is? How long does it take engine to run/warm up for oil to get everywhere it needs to be?
I don't hear anything.
There is no way possible for us to even guess without at least audio.

Questions.
Did you lube Everything during installation including lifters, rocker arms and bushings, cams, bearings, rings, cylinders and etc.?
Did you prime the oil pump?
Does it sound like lifters not pumped up yet?
What area does it sound like it's coming from?
Is it hard or soft noise?
Steady or re-occurring?
If re-occurring, 1/4 engine speed, half engine speed, full engine speed?
Tap or a knock?
Can you upload a video to Youtube?
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Old 10th November 2019
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Even with a sound clip it's tough to diagnose online. Without one it's not even possible.
I suggest uploading a video to YouTube.
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Old 10th November 2019
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If it is a ticking noise, could be that lifters didn't built up enough preasure yet. But like others said, hard to diagnose even with the video, without it is impossible...
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Noises during initial startup seem to be common as the metal parts 'season' themselves.
It may not sound like you expect until the parts get used to each other.
But don't overlook obvious sounds of something not right.

Here is some ideas to look for in Hunting Down Noises in the XLF's Sportsterpedia.
http://sportsterpedia.com/doku.php/t...ortster_noises

Information on using a stethoscope or other listening device. The Critical Listening part can be crucial.
http://sportsterpedia.com/doku.php/t..._engine_noises

You can pick up one of these pretty easily instead of a stethoscope for listening.
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Old 11th November 2019
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this is my first build, so experience with this is practically none, but have ridden Harleys for 25 years. my plan was to post a video, but could not, so if problems persist I will post to youtube and do a link. thank you for the education in the answers, thus far. I appreciate the help. I took a 2' hollow metal jack handle with rubber hand grip on one end and listened to all 4 sides of each rocker box and the bottom of all 4 push rods. everything sounded consistent. nothing higher/lower pitched; nothing louder/quieter. so that is good i think. when i first posted, i think the problem was not enough oil had gone all the way through the engine, and maybe lifters. i soaked the lifters in oil for 40 minutes before install, but that was 2 months ago, as i am slow with limited time for project. after 6 heat/cold cycles, i got confident, or stupid, and rode it for first time to gas station, 1 mile away. the original noise was gone i thought, but i heard a new noise. maybe rockers hitting top of rocker boxes? i used Sharpie to mark over rockers, so if this noise keeps up i will pull rocker box tops and see if i see anything. any more thoughts from forum based on what i said are appreciated, again.
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It's good you marked the rocker boxes.
The lifters will raise Hell on startup until they get pumped up which is usually relatively quick.
It sounds worse than it is but they should have been soaked just prior to installation.
Rolling the engine over to complete installation usually drains them somewhat anyway.
So that much is normal as long as they are quiet now.
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Old 12th November 2019
DitchTBHSMM DitchTBHSMM is offline
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https://www.youtube.com/watch?v=GcLNMhizIN0

I hope this works. Or search Sportster Engine Rebuild Noise on Youtube, posted 11/12/19 by Tyson Krutsinger.

Thank you.
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Old 12th November 2019
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Sounds like there is some hitting inside the rocker.
High lift cams?

Keep in mind that sounds from the bottom can resonate more to the top.
Or from everywhere to everywhere else.

Have you taken that off yet to look for witness mark?
I assume with you concentrating on the front rocker, that's where you are thinking it is?
It doesn't sound like drained lifters anyway.
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Old 12th November 2019
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Mamma mia!
It remember me mine when i barely made it to the dealer with broken crankpin and seized cams...

I'm not an expert like many other here...
but i strongly suggest to tear down and check thoroughly everything...
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