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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Engine Knocking! any ideas? /cgi-bin/YaBB.pl?num=1382707667 Message started by Alcohie on 10/25/13 at 06:27:46 |
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Title: Engine Knocking! any ideas? Post by Alcohie on 10/25/13 at 06:27:46 Ok this is my first post so bare with me, I have a 1996 Savage a litlle over 5000 miles on it, that I picked up for free a few years ago, the bike was just sitting I am guessing for about 10 years, had no title but managed to get a bonded title, changed throttle cable, cleaned carb, changed oil and spark plug! To my surpise it fired up then I let it sit for about two years now present day, still runs after another carb cleaning, but noticed a knocking sound in the bottom, first thought was the cam ten. that I have read some much about so pretty much ignored it and installed mac exhuast, now ready to figure out knocking so removed clutch cover to examine cam ten. its was extended 16 to 17mm but not fully extended so is it my source of knocking? Also I noticed the gear behind the clutch (which I believe is the oil pump gear)seems to have slack. Is this normal? I have a sound clip of the knocking but not sure of how to post. O almost forgot I started it yesterday before tearing in to it no knock with choke but after warm up and choke off at idle there it is! Open to any suggestions! |
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Title: Re: Engine Knocking! any ideas? Post by engineer on 10/25/13 at 06:53:38 Some people use Youtube videos to demonstrate strange sounds from their engine and then post a link here on the forum. |
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Title: Re: Engine Knocking! any ideas? Post by Dave on 10/25/13 at 07:10:53 It is hard to help locate a knock that we can't hear. Even when the bike right in front of us some of these things are hard to locate. My bike started knocking badly with only about 1,000 miles on it. For some reason my left crank bearing had some play, and the flywheel nut was only finger tight. The knocking most likely was from the flywheel being loose and banging on the crankshaft splines. My knock made less noise at higher rpm's....as the crank and flyweel momentum reduced the impact loads at higher speeds. The cam chain is supposed to make more of a grinding sound than a knock....although I have never heard it in person. My bike measured 15mm when it only had 1,000 miles on it.....so I believe the travel out to 20mm takes a while and at 16-17 you should not yet be in a problem. |
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Title: Re: Engine Knocking! any ideas? Post by verslagen1 on 10/25/13 at 08:16:39 I got a bike with a burned piston that knocked pretty good. The piston melted a bit and collapsed onto the rings locking them in place. I think the knocking was piston slap. Get a mechanics stethoscope and try to isolate where the knocking is coming from. |
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Title: Re: Engine Knocking! any ideas? Post by Serowbot on 10/25/13 at 09:07:37 4F626D6166676B0E0 wrote:
Is it possible that you have the idle speed set way too low?... It will knock if it is lugging at idle... :-?.. |
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Title: Re: Engine Knocking! any ideas? Post by Alcohie on 10/25/13 at 09:10:54 Heres a link to youtube of my bike http://youtu.be/9wMR9VzaB4E I am a idiot when it comes to forums |
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Title: Re: Engine Knocking! any ideas? Post by Serowbot on 10/25/13 at 09:13:52 Video is set to private viewing... we can't see it... :-?... |
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Title: Re: Engine Knocking! any ideas? Post by Alcohie on 10/25/13 at 09:24:12 Ok should be working now! I am doing all this from my cell phone! Its a pain |
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Title: Re: Engine Knocking! any ideas? Post by Rix on 10/25/13 at 09:50:27 Idle sounds too low. That's bad. Can't hear a knock really. If you don't have a mechanic's stethoscope, stick a screwdriver on various parts and your ear on the handle and see if you can narrow down the location of the noise. |
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Title: Re: Engine Knocking! any ideas? Post by Alcohie on 10/25/13 at 10:50:58 Low idle does make since, cause after the mac muffler install it dropped the idle even slower I will slap it back together, next week after I get the cam ten. mod done or bought, and try raising it a bit, I havent played with the carb adjustments any because its coming off anyways for a lancer carb kit I have |
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Title: Re: Engine Knocking! any ideas? Post by justin_o_guy2 on 10/25/13 at 12:37:13 Minimum 1,000 RPM. Low oil pressure system. Low Idle = ruined head. The cam will eat the aluminum w/o enough oil |
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Title: Re: Engine Knocking! any ideas? Post by Alcohie on 11/03/13 at 10:48:33 Did a cam ten. mod. Idled up a bit slapped it back together and the knocking seemed to have stopped |
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