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May Need Some Help Rebuilding A K341


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#1 BairleaFarm OFFLINE  

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Posted October 27, 2013 - 07:39 PM

I want to get a good engine so I can work this massey. This can't out of the tractor. The story goes that it broke a rod. The one he put in it was for a smaller hp engine and was too short. I tried starting it and it didn't have any compression. Piston and rod. There was still grease around the crank when I un bolted the rod.

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I didn't clean anything. All pictures are how it came apart.

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Rod and cap appear new.
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#2 BairleaFarm OFFLINE  

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Posted October 27, 2013 - 07:41 PM

There are alot a shaving and crude from somewhere.

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#3 BairleaFarm OFFLINE  

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Posted October 27, 2013 - 07:45 PM

Looks like the cylinder was honed. Head looks ok from what I can tell.

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Sorry for the blurry pics. If you seer anything broken or wrong let me know. I'd like to know where the metal shavings came from.
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#4 olcowhand ONLINE  

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Posted October 27, 2013 - 07:53 PM

Looks like they put it back together without cleaning anything!    I've no true idea where those shavings came from, but would appear to be from gear teeth.  I'd for sure take those balance gears out!  That rod looks to cross from a Magnum 12 through Magnum 16.  I thought the M16 used the same rods as your engine.  So your piston didn't reach flat to the top of the block?  If it did, then the rod is correct.  They may have had the cam timing off causing no compression.  Pics are too blurry to really tell anything by them.


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#5 BairleaFarm OFFLINE  

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Posted October 27, 2013 - 08:05 PM

I'll get clearer pics of anything you need. The piston goes above the block but seems to be level with the top of the spacer I pictured. Ill pull those gears if it's the best thing to do. Who would put the engine together without cleaning anything? I didn't notice things loose such as exhaust clamps.
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#6 superaben OFFLINE  

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Posted October 27, 2013 - 08:25 PM

Who would put an engine together without cleaning anything? 

 

Some people do some stupid things either through ignorance or... stupidity.

 

Ben W.


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#7 olcowhand ONLINE  

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Posted October 27, 2013 - 08:32 PM

Need to get a proper rod.  Using all those gaskets/spacer does take care of the piston area, but increases the volume at the valve side of things, which will lower compression.  There is still something else causing loss of compression though, as even with the spacers, it should have had decent compression.  Either valve issue, or cam timing.  


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#8 BairleaFarm OFFLINE  

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Posted October 27, 2013 - 08:58 PM

So those spacers aren't supposed to be there? I should be able to get parts I need from the engine that's on the tractor. I just remove the gears all together? That seems wrong.

Edited by BairleaFarm, October 27, 2013 - 08:58 PM.

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#9 Rock farmer OFFLINE  

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Posted October 27, 2013 - 09:04 PM

Are you saying it had three head gaskets on it?
The shavings may be from the old connecting rod. That would be where it hit the block after it broke.
Is the current connecting rod too long or too short?

Joe
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#10 bgkid2966 OFFLINE  

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Posted October 27, 2013 - 09:08 PM

Here is a link to the manual for the engine.  http://gardentractor...service-manual/

 

There are a lot of guys around to help with that one. I do not think the spacer should be in between the head and block. The shavings could be from just about anywhere.

 

 

 

Geno


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#11 BairleaFarm OFFLINE  

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Posted October 27, 2013 - 09:09 PM

It has two gaskets and a spacer. Supposedly the rod is to short per previous owner. All I know for sure is that there is no compression. Thanks for the manual. I downloaded it some time ago. I roughly thumbed through it tonight.

Edited by BairleaFarm, October 27, 2013 - 09:10 PM.

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#12 DH1 ONLINE  

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Posted October 27, 2013 - 09:14 PM

If you have no compression and the piston goes up and down then most likely there is a valve stuck open.


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#13 olcowhand ONLINE  

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Posted October 27, 2013 - 09:15 PM

So those spacers aren't supposed to be there? I should be able to get parts I need from the engine that's on the tractor. I just remove the gears all together? That seems wrong.

 

No on the spacer.  There should be a single head gasket, and the piston should come up flush with the block.  The rod is too long, not too short.  You can leave the balance gears in if you like, but they can grenade through your block, and give little benefit. 


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#14 BairleaFarm OFFLINE  

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Posted October 27, 2013 - 09:17 PM

If you have no compression and the piston goes up and down then most likely there is a valve stuck open.

I was reading about valve adjustment and that had crossed my mind.

I don't have a problem pulling the gears.

If the spacer isn't supposed to be here then why is it? Do certain engines use them? Or is it a custom piece?

Edited by BairleaFarm, October 27, 2013 - 09:19 PM.

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#15 WNYTractorTinkerer OFFLINE  

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Posted October 27, 2013 - 09:36 PM

That engine would scare the be-jezus outta me..  Wrong rod??  3 head gaskets??  What other mix & match parts were installed (CAM??)  I'd be taking part #s from everything and making extra-sure everything was right before reassembling..  As far as the metal goes when you get the correct rod use plasti-gage to check the fit..  Also-  If there is galling or aluminum on the crank journal, clean it up with Muriatic acid..  (will remove any aluminum deposits)  Good Luck!!


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