SuzukiSavage.com - knocking in the top of engine

pinskas

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SuzukiSavage.com
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knocking in the top of engine - is it serious?
06/16/10 at 11:36:16

Hello,
there is a knocking in the top of the engine, sounds like metal to metal tapping, it doesn't matter if the engine is cold or hot, maybe it sounds louder when it is hot. It sounds like valves taping somewhere, but I've just adjusted them(made the gap 0.1mm).
I have no loose of power as it was before.
Is it serious problem? What I must look for?

My motocycle - Suzuki Savage Ls650 made 1986.

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28644 Tucson Az Gender:	Re: knocking in the top of engine - is it serious? Reply #1 - 06/16/10 at 11:55:56 valve clearance... gap should be 0.008 to 0.013mm, .003 - .005in... EDIT!... These numbers are incorrect!... Taken from Clymers manual. They are wrong in the manual! Sorry... Frickin' Clymers! ...
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spacepirates

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Igni Ferroque

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Re: knocking in the top of engine - is it serious?
Reply #2 - 06/16/10 at 11:57:24

the knocking is most likely the valves. I seem to remember a washer or two that loosens up and shuffles around a bit. it is hard to notice, but the knocking should get quieter as you roll on the throttle as the valves open up and take away the clearance of the washer.

if you've got the time, open her back up again and double check the clearances. if they're spot on the .1mm, then just get used to the knocking, it is normal and fine. else if they've opened up larger, something didn't get tightened down enough and you've got to do 'er over again...

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spacepirates Serious Thumper Offline Igni Ferroque Posts: 515 Pittsburgh, PA Gender:	Re: knocking in the top of engine - is it serious? Reply #3 - 06/16/10 at 11:58:43 Serowbot wrote on 06/16/10 at 11:55:56: valve clearance... gap should be 0.008 to 0.013mm, .003 - .005in... according to google, .005 inches is .127mm... http://www.google.com/search?hl=en&client=firefox-a&hs=C3I&rls=org.mozilla%3A... probably just missed a decimal place somewhere....
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28644 Tucson Az Gender:	Re: knocking in the top of engine - is it serious? Reply #4 - 06/16/10 at 12:14:39 Very sorry,... you are correct... I copied the numbers out of the Clymers manual. They state it wrong... I will ammend my previous post,... ...
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Phelonius Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1897	Re: knocking in the top of engine - is it serious? Reply #5 - 06/16/10 at 13:03:44 Some feeler gauge sets have both the metric size and the sae size printed on them. I like the ones that have both. the manual may have given a metric measure and labeled as sae. This can give a huge difference in clearance. Phelonius
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NickNZ YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 5 Nelson, New Zealand Gender:	Re: knocking in the top of engine - is it serious? Reply #6 - 06/16/10 at 20:32:26 Hi, could pay to check the decompression setting, mine had a knock after i first put it back together and it was the cam follower hitting the decomp lever, you could feel it by touching the lever. Nick
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: knocking in the top of engine - is it serious? Reply #7 - 06/16/10 at 21:04:47 check that you're setting them at the correct TDC. Should be at TDC of the compression stroke.
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serenity3743 Serious Thumper Offline Striving to better, oft we mar what's well Posts: 778 Black Mountain, NC Gender:	Re: knocking in the top of engine - is it serious? Reply #8 - 06/17/10 at 05:04:20 verslagen1 wrote on 06/16/10 at 21:04:47: check that you're setting them at the correct TDC. Should be at TDC of the compression stroke. I concur. I have some experience with setting them at the wrong TDC. And they do make extra noise.
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cursal Full Member Offline Daily Savage Rider Posts: 175 Eugene, OR Gender:	Re: knocking in the top of engine - is it serious? Reply #9 - 06/24/10 at 11:02:04 I am confused with the edits, can someone just post the correct numbers below. Thanks!
Back to top	1998 Savage, 18,700 Miles, Wind Shield, Tach, K&N Airbox Filter, Leather Bags, CYCLE-TRON II Battery, verslavy cam adjuster, Kevlar F Pads Black. Professional Web Developer: www.OregonPublishing.com IP Logged

Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28644 Tucson Az Gender:	Re: knocking in the top of engine - is it serious? Reply #10 - 06/24/10 at 11:14:56 Sorry... My screw up... the Clymers manual has the metric conversion wrong... These are correct... 0.003" to 0.005" inches... 0.076mm to 0.127mm... Shoot for the middle.... 0.004"inches or 0.1mm... same on all four valves...
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cursal Full Member Offline Daily Savage Rider Posts: 175 Eugene, OR Gender:	Re: knocking in the top of engine - is it serious? Reply #11 - 06/25/10 at 09:00:26 Thanks
Back to top	1998 Savage, 18,700 Miles, Wind Shield, Tach, K&N Airbox Filter, Leather Bags, CYCLE-TRON II Battery, verslavy cam adjuster, Kevlar F Pads Black. Professional Web Developer: www.OregonPublishing.com IP Logged

pinskas YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 4	Re: knocking in the top of engine - is it serious? Reply #12 - 07/04/10 at 04:46:25 Thank's for the coments. Now I see that this knocking is more on the left side of the top of the engine, and I also see that sound gets louder when I open the throttle. Maybe you can tell something more now?
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: knocking in the top of engine - is it serious? Reply #13 - 07/04/10 at 05:36:52 Till you check/adjust the valves, youre probably not gonna know what it is. Id eliminate that spot on the t-shootin list.
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