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Author Topic: noise from front of engine  (Read 7542 times)

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fkjunkin

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Re: noise from front of engine
« Reply #15 on: October 14, 2013, 08:49:47 PM »

Thanks for the words of encouragement. Just started it up to listen and could not replicate it. Will try it hot in the am. Not sure what this means but motor was warm both times before.
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Mount'nman

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Re: noise from front of engine
« Reply #16 on: October 14, 2013, 10:46:47 PM »

Could be pinging...  mine did it and went away only after a good tune...
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cahdbiker

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Re: noise from front of engine
« Reply #17 on: October 15, 2013, 12:44:05 AM »

fkjunkin, I hope you get your issue taken care of and let us know. If you rev up your engine when it is at operating temp and you hear a knocking noise just before it reaches idle then my money is on piston slap based on an experience I had with my 95 Heritage with S&S 107. If you don't hear any knocking just off idle and only hear the ticking noise you described then I would go with some of what the other guys said regarding valve train issues. Good Luck.CAHDBIKER
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murphy

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Re: noise from front of engine
« Reply #18 on: October 15, 2013, 11:46:54 AM »

Detonation?

 :nixweiss:
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Badger Mike

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Re: noise from front of engine
« Reply #19 on: October 16, 2013, 07:49:23 AM »

Whatever it is, I hope you have better luck than me!  Same issues and when we took mine apart it was a mess in there. 
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fkjunkin

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Re: noise from front of engine
« Reply #20 on: October 16, 2013, 09:00:08 PM »

Well this is even stranger now, went for a ride to try to listen and warm it up and no racket. Rode about 40 miles no radio listening close, just before I got back it started again in the same rpm range. Whatever it is it is inside engine vibration and sound increase with throttle. Parked untill sat will pull cam cover then and peek inside. Hope for the best.
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Dan_Lockwood

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Re: noise from front of engine
« Reply #21 on: October 17, 2013, 12:22:50 PM »

Well this is even stranger now, went for a ride to try to listen and warm it up and no racket. Rode about 40 miles no radio listening close, just before I got back it started again in the same rpm range. Whatever it is it is inside engine vibration and sound increase with throttle. Parked untill sat will pull cam cover then and peek inside. Hope for the best.

I'm not sure when the rattles started, but it seemed to be more pronounced on the '07 110" and later engines.  I had an '08 SERK and it too had the rattle between 2500 to 3500, give or take a couple hundred rpms.  I now have an '09 SERG 110" and guess what, same rattle, same rpm range.  I think if you go back to some of the rattle threads for this specific rattle, they are all in the same rpm range, and there are plenty of complaints.

When I was in Sturgis '08, (Rapid City HD Civic Center) I talked to the tech guy at the parts desk about the rattle in my '08 110".  He knew what I was talking about and said that it's harmonics in the valve train.  Kind of like a loosely tuned tunning fork that get louder at certain vibration frequencies.  He said that the beehive valve springs would be where he would start if it were him.

Has anyone used the beehive springs and if so, did they help to quiet down the rattles?

I think that when people here have changed out their cams, lifters etc, that the noise in some has pretty much gone away.  This would lead me to harmonics as well.  Changing lift and duration will change vibration frequencies within the valve train.

I don't disagree with piston slap either, but from my old car days experience with cracked pistons or piston slap, I think that piston slap is a more pronounced knocking sound versus our 2500/3500 rpm rattles.

I'm just a layman and without any HD experience to speak of like the engine builders on our forum, and they know more about this than I do.  But it sure seems to me that with all the years that HD has made engines that they should by now be able to make one so quiet that you can't hear it running, at least from a motor noise standpoint.  This is one area that a true waterpumper would help insulate the rattles from us.

Good luck with your rattles and it sounds like you have the same rattle that most all of us has experienced with the 110" engines, but my noise is always there, it never goes away like you say yours does.  So you "may" have something defined causing your problem.  With what I've read here and in other places, the problems with the stock lifters is enough to make me want to replace them before they fail.  Once in the cam chest as others have suggested, change them out with the cam bearings.
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grc

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Re: noise from front of engine
« Reply #22 on: October 17, 2013, 01:33:09 PM »


True piston slap is normally most evident with a cold engine, not a hot one.  The piston to wall clearance is at it's maximum when cold.

Jerry
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fkjunkin

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Re: noise from front of engine
« Reply #23 on: October 17, 2013, 10:38:43 PM »

Got time to open cam chest today and it was ugly, don't know how it ever was quiet. It is over my head now. Can anyone suggest a good indie shop in south Mississippi or New Orleans area? Guess I can start with the cam questions now as well :bigcry:
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CVO2FIXUP

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Re: noise from front of engine
« Reply #24 on: October 17, 2013, 11:00:16 PM »

 What is damaged? What is your crank run out? Did you have a chance to measure that up yet? Once totally apart, would you post some picks of the scoring, and wear. As far as cam goes, S&S  551 for a stock comp 110.
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fkjunkin

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Re: noise from front of engine
« Reply #25 on: October 17, 2013, 11:05:38 PM »

I am thinking this is an excuse to leave very little stock. Wish I could make more sense of all this build talk but I am not a mechanic however I am now looking for someone who is. I have put the wrench down and picked up the glass for today.
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Boatman

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Re: noise from front of engine
« Reply #26 on: October 18, 2013, 09:43:11 AM »

Got time to open cam chest today and it was ugly, don't know how it ever was quiet. It is over my head now. Can anyone suggest a good indie shop in south Mississippi or New Orleans area? Guess I can start with the cam questions now as well :bigcry:

Can you post some pictures for us?
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fkjunkin

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Re: noise from front of engine
« Reply #27 on: October 18, 2013, 10:26:49 AM »

Pics maybe Sunday at work right now busy tomorrow
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phato1

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Re: noise from front of engine
« Reply #28 on: October 18, 2013, 08:37:04 PM »

Got time to open cam chest today and it was ugly, don't know how it ever was quiet. It is over my head now. Can anyone suggest a good indie shop in south Mississippi or New Orleans area? Guess I can start with the cam questions now as well :bigcry:

Welcome to the destroyed cam chest club, now about the dues payment....... :oops:

All kidding aside, that is unfortunate and I do know the feeling....

As far as cam choices - as well as other components -- that would depend on your goals for the engine and how far you have to take it down. After getting   the crank runout checked the situation may change.
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fkjunkin

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Re: noise from front of engine
« Reply #29 on: October 18, 2013, 09:24:50 PM »

Don't belive runout on the crank will be a problem in my future. Looks like I found someone to fix/build me a 124 with the s ans s kit.
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