SuzukiSavage.com - Dropped left side exhaust valve head.

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Re: Dropped left side exhaust valve head.
Reply #15 - 07/07/16 at 14:52:23

Well....the spark plug has not been changed in about 18 months. Before then and up to recently the bike has been a 120 mile @ 5 days a week commuter.

So I suppose if any loose debris had gotten free on the last plug change, it may well of happened a while ago.

It's possible the side or center electrode may of deteriorated to the point of dropping in.

However, I have purchased a NGK plug in the past for another bike and whilst installing it outside of the store of purchase it sheered off with the amount of force taken to open an already opened pickle jar. Leaving the threads in the hole and the main body of the plug in the socket.

The stock reply from the store manager was that the plug was over torqued which was b.s. I told him that the head was Chinese aluminum and would of stripped the threads before shearing.

No recourse on that one, either way.

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robinsoncrusoe YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 13	Re: Dropped left side exhaust valve head. Reply #16 - 07/07/16 at 15:02:43 nm
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Re: Dropped left side exhaust valve head.
Reply #17 - 07/07/16 at 15:05:47

verslagen1 wrote on 07/07/16 at 14:49:42:

robinsoncrusoe wrote on 07/07/16 at 14:03:19:

The auto fuel valve mod. It solved the forgetfulness of leaving the main fuel petcock open and the nasty idea of a stuck carb float etc. etc...

I applaud your inventiveness but...
One of the key issues with the stock petcock is vacuum loss at high throttle settings.
At WFO there's no vacuum or at least not enough to open the valve all the way.
And this occurs even with a stock setup.

So... potentially, this maybe the issue.

Nice idea. Although no poblems through the gears at all rev ranges right up to no more guts. I believe any problems with this fuel valve would of become apparent a long time ago.

Also I'm a little lost as to how this could of caused the valve head to drop off.

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batman Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3806 osceola new york Gender:	Re: Dropped left side exhaust valve head. Reply #18 - 07/07/16 at 21:09:52 You were running at 70mph ,you might have been running on the lean side which means hotter,the valve needs to seat to transfer heat to the head to cool it, your 12mi. run to work and back would take the temps from cold to overheated(if you were running lean)some 20 time per wk,heat stressing the valve.
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18099 Camp Springs, Kentucky Gender:	Re: Dropped left side exhaust valve head. Reply #19 - 07/08/16 at 03:51:38 Unless the exhaust port got oil soaked from a hole in the piston in the last few seconds.....the exhaust port really doesn't look like the bike was running lean.....it look more like it was running rich. The valves are dark....not the ghostly white like a 70 mph ride would provide.
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batman Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3806 osceola new york Gender:	Re: Dropped left side exhaust valve head. Reply #20 - 07/08/16 at 14:17:56 Dave ,could running rich erode the valve?
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Re: Dropped left side exhaust valve head.
Reply #21 - 07/09/16 at 04:53:28

I really don't know what causes some of these bikes to lose the top of the valve.

When the VW beetle was in the last years of production, the fuel injection and lean mixtures caused very short exhaust valve life. The lean mixtures made the exhaust valves get very hot, and the stems would "stretch and neck down", and they could also burn around the hardened face.

Nobody who has lost a valve on the Savage has given us good photos or a reason to understand what caused the failure.

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robinsoncrusoe YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 13	Re: Dropped left side exhaust valve head. Reply #22 - 07/09/16 at 15:45:49 Thank you everyone for your constructive input. So is it engine in bike frame or engine out of bike frame for a rebuild? Any recommendations.
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robinsoncrusoe YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 13	Re: Dropped left side exhaust valve head. Reply #23 - 07/09/16 at 15:59:39 another pic
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18099 Camp Springs, Kentucky Gender:	Re: Dropped left side exhaust valve head. Reply #24 - 07/09/16 at 16:49:10 It is an engine out of frame rebuild. You can't get the cylinder off the crankcase with the engine in the frame.
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robinsoncrusoe YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 13	Re: Dropped left side exhaust valve head. Reply #25 - 07/09/16 at 18:52:50 Thanks Dave. Any ideas on flushing the crank case of aluminum grinds? Maybe used filtered oil mixed with gas 70/30? Then remove spark plug and spin the crank with a drill, then drain?
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Dropped left side exhaust valve head. Reply #26 - 07/09/16 at 20:44:19 I like diesel for flushing stuff..
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robinsoncrusoe YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 13	Re: Dropped left side exhaust valve head. Reply #27 - 07/09/16 at 21:38:50 justin_o_guy2 wrote on 07/09/16 at 20:44:19: I like diesel for flushing stuff.. That's a great idea.
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18099 Camp Springs, Kentucky Gender:	Re: Dropped left side exhaust valve head. Reply #28 - 07/10/16 at 03:21:53 justin_o_guy2 wrote on 07/09/16 at 20:44:19: I like diesel for flushing stuff.. Yep....Me too!
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: Dropped left side exhaust valve head. Reply #29 - 07/10/16 at 07:21:41 Just remember not to freak out the first time you fire it after washing it with diesel. It's gonna smoke!
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