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Old 11-23-2012, 03:58 PM   #1
pcwirepro OP
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1150 Engine Knock Please Listen

I could use a little help getting to the bottom of a new knock. 2004 R1150GS with 74k on the odometer. I double checked the valves and rocker end play. Everything is ok there. I held the TB to rule out anything there. The knock shows up within 30 second of startup and seems to be more on the right side/ front. Any thoughts would be appreciated. Oil is Mobil 1 15/50
http://s1259.photobucket.com/albums/...psf0c74176.mp4

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pcwirepro screwed with this post 11-23-2012 at 07:00 PM
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Old 11-23-2012, 04:05 PM   #2
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maybe the cam chain tensioner?>
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Old 11-23-2012, 04:23 PM   #3
pcwirepro OP
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Considered that.

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Originally Posted by kubiak View Post
maybe the cam chain tensioner?>
Does the left side (the one that has a newer style) cause noise on the right side or front?
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Old 11-23-2012, 08:17 PM   #4
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They all do that

OK so my 04 GSA had a sound similar to that, I set the rocker arm end play to as close to minimum I could, adjusted the valves. noise was diminished but still there, replaced the t-chain tensioner GOT LOUDER Took the tnesioner out filled it with oil (both halves) reinstalled back to normal. But still makes a bit of clatter. I had previously checked the push rods both caps on each were OK. My next step will be to pull out the tappets and have a look at the cam. But it is much better and I will deal with it when I get the time.
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Old 11-23-2012, 09:29 PM   #5
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Mine does it on and off. What can you do? I'll ride it 'til it stops.
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Old 11-25-2012, 09:07 AM   #6
slartidbartfast
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Always very hard to diagnose from a recording but that sounds like a mechanical knock to me - thinking something major in bottom end and hoping for your sake I'm wrong.

Does the knock get louder or quieter if you hold it at 2K rpm?

What does it do as you pull away gently?

You might check that all your crash-bar bolts are tight before you get into any other troubleshooting.
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Old 11-25-2012, 09:15 AM   #7
pcwirepro OP
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Well that's not good

The noise is there even without the crash bars on. I'll have to check what it does at higher rpm. I seem to think it dies down and of course up to speed I can't hear a thing. I almost bought a stethoscope yesterday.
A few questions for those of you in the know.
Can fuel make that kind of deep knocking sound? Almost all E85 here.
Would the shortened rod make that sound?
Can a failed or tired cam chain tensioner on the left create that kind if noise on the right or center of the engine?
Just grasping at straws here, hoping its something simple. All that bearing, cam and follower stuff sounds expensive. I'll fix just about anything that doesn't require the motor coming out. Beyond that this thing is getting scrapped.
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Old 11-25-2012, 09:33 AM   #8
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Could be soot on the squish area, the piston will make contact on the exhaust stroke and rock over to make the skirt make sound.

Have seen it before, took the head off and more than 1mm of soot there, kleened up and the sound were gone.

Try some fuel additive and start reving that engine a bit more.
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Old 11-25-2012, 09:35 AM   #9
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what if

what if you have a look here http://www.advrider.com/forums/showt...=839695&page=2
post no. 19.
Later in the thread there are my photos too. I found the cam and cam folower damaged on the RH side.

G.
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Old 11-25-2012, 09:39 AM   #10
pcwirepro OP
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Yep that's what I fear.

Quote:
Originally Posted by Gintaronas View Post
what if you have a look here http://www.advrider.com/forums/showt...=839695&page=2
post no. 19.
Later in the thread there are my photos too. I found the cam and cam folower damaged on the RH side.

G.
That or a bearing issue.
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Old 11-25-2012, 03:47 PM   #11
pcwirepro OP
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More info

I went for a nice albeit cold ride today and paid close attention to the noise. Off idle it seems to get much lighter and at 3k and above it seems to go away or I can't hear it over the engine noise. Also, when I started the bike it was dead silent up there, within 30 seconds it was banging around. Any thoughts?
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