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 Post subject: Engine rattle
 Post Posted: Sun Jan 20, 2019 8:12 pm 
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Hornet Baby
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Joined: Fri Oct 05, 2018 1:09 pm
Posts: 26
Back again with a headscratcher. I noticed I had the typical rattle from cam-chain, and quickly ascertained that it must be the automatic tensioner. Ordered the manual one, installed it and tighten the chain up in the correct way.

Rattle was still there! Started searching for possible faults and found that the rattle goes away when clutch is not engaged, and when clutch is engaged the rattle comes back. It appears to go away as soon as RPM goes up, but there is a terrible rattle at low rpm and during cold start. The sounds originates from the right side of the engine (clutch side)

Anyone has any idea? Clutch housing?


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 Post subject: Re: Engine rattle
 Post Posted: Sun Jan 20, 2019 8:34 pm 
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Victor Meldrew
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Joined: Thu Feb 27, 2003 10:51 pm
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Location: Worcester
http://www.hondahornet.org.uk/messageboard/viewtopic.php?f=59&t=24463

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And then one day you find
Ten years have got behind you
No one told you when to run
You missed the starting gun


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 Post subject: Re: Engine rattle
 Post Posted: Sun Jan 20, 2019 8:38 pm 
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Hornet Baby
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richard pitman wrote:


Yeah I read that before posting, but I'm not sure if he had as much rattle as mine does. It sounds like something is about to go boom inside the engine. If this is for example an issue with the clutch bearing, discs, etc. I want to open the engine up and fix it.


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 Post subject: Re: Engine rattle
 Post Posted: Sun May 12, 2019 1:31 am 
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Hornet Baby
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Posts: 26
richard pitman wrote:



Okay, so I still haven't figured out what the rattle is yet, so I made a video. Now, this is how it sounds when the engine is warm. When the engine is cold and is sputtering more it sounds like the engine is building a house inside the case, no joke.

We can conclude that I have freeplay somewhere, and the natural uneven idle of the engine makes the freeplay cause rattle sounds, but the question is where does it originate from?

Clutch bearing? Basket? Clutchdisks? Bad clutchsprings?

https://youtu.be/mGdG_vSa2LI


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 Post subject: Re: Engine rattle
 Post Posted: Sun May 12, 2019 11:42 pm 
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Hornet Baby
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Posts: 26
Solution:
Previous owner installed the clutch basket assembly the wrong way. It should go together in one specific way. If you install the baskets in the wrong orientation, the cogs will not lock up together, thus causing a clutch rattle.

https://www.youtube.com/watch?v=Oz53Ix87E40


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 Post subject: Re: Engine rattle
 Post Posted: Mon May 13, 2019 8:24 am 
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True Horneteer
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Location: In The Garage
Well done - good work narrowing the problem down to the clutch basket. :D


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 Post subject: Re: Engine rattle
 Post Posted: Tue May 14, 2019 12:09 am 
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Hornet Baby
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HOON98 wrote:
Well done - good work narrowing the problem down to the clutch basket. :D


Thanks mate :)


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 Post subject: Re: Engine rattle
 Post Posted: Tue Jun 11, 2019 7:04 pm 
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Hornet Baby
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Posts: 26
Back at it again.

My hornet project concluded today, and the first fire-up of the engine proved that it is NOT the clutch that is making the rattlesounds.

Any advice is much appreciated. Rattle comes from clutch-side, and goes away when clutchlever is engaged.


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 Post subject: Re: Engine rattle
 Post Posted: Thu Jun 13, 2019 6:55 am 
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Hornet Pilot

Joined: Fri Jan 17, 2014 10:07 am
Posts: 87
Location: Denmark
Use a screwdriver as a listening device to locate the rattle more precisely. Place the pointy end where you want to listen, and the handle on the bones right next to your ear - this way is is (can be) much easier to find the exact location of the noise.


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 Post subject: Re: Engine rattle
 Post Posted: Thu Jun 13, 2019 4:52 pm 
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Hornet Baby
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jacobask wrote:
Use a screwdriver as a listening device to locate the rattle more precisely. Place the pointy end where you want to listen, and the handle on the bones right next to your ear - this way is is (can be) much easier to find the exact location of the noise.


I'll give it a go. Used the screwdriver trick before, but not now. I'll come back with the results.


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