2004 gsxr 600 engine knock Help!!! - Suzuki GSX-R Motorcycle Forums Gixxer.com

 
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post #1 of 14 (permalink) Old 06-11-2019, 03:39 AM Thread Starter
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2004 gsxr 600 engine knock Help!!!

I was riding on the hwy today and all the sudden I heard a loud knock, I pulled over and towed home, I’ve only owned the bike for a month now. It has 9700 miles on it, oil is good and spark plugs are tight ( a co-worker) said to see if a plug had backed out. Could it be the cct with that low of miles? Here’s the YouTube link, any help is greatly appreciated!!!
https://youtu.be/NlCpUr5T4aQ
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post #2 of 14 (permalink) Old 06-11-2019, 06:47 AM
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Re: 2004 gsxr 600 engine knock Help!!!

Cam chain tensioners were a problem on the older bikes, not these. Sounds like it's running on three cylinders. Take the body work off and let it warm up a little. Put a little water on the four exhaust headers. One will be cooler than the rest. That's your problem cylinder. I does sound like a blown out plug, but it's hard to tell on a video. Find the bad cylinder and go from there. If the plug looks ok, do a compression test on that cylinder.
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post #3 of 14 (permalink) Old 06-11-2019, 11:14 AM Thread Starter
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Thank you! I’ll try that and go from there.
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post #4 of 14 (permalink) Old 06-11-2019, 01:09 PM Thread Starter
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Quick update, I have a buddy bringing a compression tester over this weekend, I pulled the plugs out and they all look normal, I did pour water on the headers and all 4 are hot, I also started the bike and pulled the coil packs out individually and they are all sparking. Until the compression tester gets here I don’t think I have anything else to check. I recorded another small clip too.
https://youtu.be/QI7FljBOmgI
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post #5 of 14 (permalink) Old 06-11-2019, 05:48 PM
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Damn, sounds like a valve hitting the cylinder man. Perhaps the cam chain jumped some teeth. Hope I'm totally wrong. The only other culprit for that noise is the cam chain being super loose. Hope it ain't any of that.

Last edited by nosurrenda; 06-11-2019 at 11:40 PM.
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post #6 of 14 (permalink) Old 06-12-2019, 02:09 AM Thread Starter
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Ended up getting a hold of a compression tester and cylinder 1,3 and 4 are 145-150 psi and cylinder 2 is at 95 psi. So looks like I’m going to need a new head
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post #7 of 14 (permalink) Old 06-12-2019, 02:34 AM
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Re: 2004 gsxr 600 engine knock Help!!!

Sorry to hear it, dude! :/ Off to eBay!
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post #8 of 14 (permalink) Old 06-12-2019, 07:07 AM
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Re: 2004 gsxr 600 engine knock Help!!!

Quote:
Originally Posted by Danthemannw View Post
Ended up getting a hold of a compression tester and cylinder 1,3 and 4 are 145-150 psi and cylinder 2 is at 95 psi. So looks like I’m going to need a new head
Why do you think it's the head? Think the valves are leaking? It could be rings too.
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post #9 of 14 (permalink) Old 06-12-2019, 07:10 AM
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Re: 2004 gsxr 600 engine knock Help!!!

Sounds like classic spun bearing on the bottom end. Check your oil and filter for metal.
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post #10 of 14 (permalink) Old 06-12-2019, 01:57 PM Thread Starter
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I’m going to get a leak down tester and try to find out more, I’ve never worked on a motorcycle engine so this is all new to me. A local motorcycle shop told me to buy this Yamaha medic RX formula and pour some down each cylinder, wait 24 hours and start it. Possibly a stuck valve since it has such low miles. What other tests can I do to narrow down this issue?
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post #11 of 14 (permalink) Old 06-12-2019, 02:03 PM Thread Starter
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Okay, I’ll drain the oil. Also I should add when it is running the exhaust sounds great and like it’s running just fine, it’s just the engine that knocks

https://youtu.be/_YXoJbA795Y
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post #12 of 14 (permalink) Old 06-12-2019, 02:10 PM
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Re: 2004 gsxr 600 engine knock Help!!!

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Originally Posted by Danthemannw View Post
...a stuck valve...
Is that even possible? It's an interference engine, so won't either the cam lobe or the piston be smacking it?
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post #13 of 14 (permalink) Old 06-12-2019, 02:21 PM Thread Starter
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I’m not sure other than what info I’m getting from other people, trying to find the best way to diagnose it before I tear into anything
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post #14 of 14 (permalink) Old 06-12-2019, 06:31 PM
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Re: 2004 gsxr 600 engine knock Help!!!

Dude you totally have a spun bearing on the crankshaft end of one of your connecting rods. Each time you start your bike you are doing more damage, but to be honest you're probably looking at buying a used engine anyway at this point.

Let me know what your oil filter looks like. Dump the oil asap.
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