Kohler K361

Troubleshooting, rebuilding, repairing Kohler engines.
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Eugen Canada
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Re: Kohler K361

Post by Eugen »

Was in the mood to do something different today so I heated these guys up with the propane torch and added some material to make it thicker. The plan is to throw them in the lathe and turn to size for interference fit and cold/hot pressing in the head.

F4C6707A-47FD-480A-B96F-55B84C72D400.jpeg
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Re: Kohler K361

Post by DavidBarkey »

Eugen wrote: Thu Feb 02, 2023 8:50 pm Was in the mood to do something different today so I heated these guys up with the propane torch and added some material to make it thicker. The plan is to throw them in the lathe and turn to size for interference fit and cold/hot pressing in the head.


F4C6707A-47FD-480A-B96F-55B84C72D400.jpeg
You may have to ream them out after pressing in the head . The weld will contract and shrink the bore .
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Eugen Canada
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Re: Kohler K361

Post by Eugen »

DavidBarkey wrote: Thu Feb 02, 2023 9:14 pm You may have to ream them out after pressing in the head . The weld will contract and shrink the bore .
For sure!
Dim dim dim,
I scream
Spit the Jim Beam
I'm ready to ream
Weld with a light beam
Have no seam
Work like a team!

That's my morning rap. :D
Case 224, 444, 644, 680E
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Re: Kohler K361

Post by propane1 »

Eugen wrote: Fri Feb 03, 2023 7:56 am
DavidBarkey wrote: Thu Feb 02, 2023 9:14 pm You may have to ream them out after pressing in the head . The weld will contract and shrink the bore .
For sure!
Dim dim dim,
I scream
Spit the Jim Beam
I'm ready to ream
Weld with a light beam
Have no seam
Work like a team!

That's my morning rap. :D
:rolleyes: :giggle:

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Re: Kohler K361

Post by JSinMO »

Eugen wrote: Fri Feb 03, 2023 7:56 am
DavidBarkey wrote: Thu Feb 02, 2023 9:14 pm You may have to ream them out after pressing in the head . The weld will contract and shrink the bore .
For sure!
Dim dim dim,
I scream
Spit the Jim Beam
I'm ready to ream
Weld with a light beam
Have no seam
Work like a team!

That's my morning rap. :D
I’m glad you were just rapping. I was worried you were having a stroke! :rofl:
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Eugen Canada
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Re: Kohler K361

Post by Eugen »

After doing it once I noticed the "new" lathe chuck was not centred somehow and the turning was not right. So weld again, put the old chuck in, turn again. Kinda ready for the press. I'm debating whether to use jb weld too or not.
57EC83B5-A522-497D-92F5-A89529A6E49E.jpeg
Last edited by Eugen on Sun Feb 05, 2023 2:08 pm, edited 2 times in total.
Case 224, 444, 644, 680E
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Re: Kohler K361

Post by Eugen »

Oven heating the head and icy cold guides turned 3 mil larger diameter than the holes in the head. Didn't go in easy, hope it's a sign they don't come loose easily. Left a tiny collar of larger diameter on the inner end, because on the other side there's a snap ring. Hopefully that blocks the guides in the head from both sides.

Reamed too.


65FB139B-CAAA-434E-A746-B2CA6B0B6333.jpeg



I'd be a lot happier with new bronze sleeves in the guides. Maybe next time.


Forgot if I said already, but I measured the bore. It's standard at the edge of wear tolerance. If the head and valves turn out to be working well I will entertain the idea of going for a 001 over rebuild.
Case 224, 444, 644, 680E
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Re: Kohler K361

Post by DavidBarkey »

@Eugen I will have to drop over when it is running in something . Curious to hear the difference between flat head and ohv Kohlers under load .
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Re: Kohler K361

Post by Eugen »

DavidBarkey wrote: Sun Feb 05, 2023 2:53 pm @Eugen I will have to drop over when it is running in something . Curious to hear the difference between flat head and ohv Kohlers under load .
Great idea! :cheers:
Case 224, 444, 644, 680E
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Re: Kohler K361

Post by Eugen »

With the valve guides firmly grafted into the head, I was wondering what state the seats are in. What do you know, one of the seats started turning in the head together with the seat cutter. Bad seat! -- says I. Proceeded to peen it, and then done that to the other for good measure. Cutting then went better, of course.

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0E2F05D0-18AD-4DA9-9FA7-6E6936526BD9.jpeg

Next would be the valves.
Case 224, 444, 644, 680E
Kubota B26 :blush:
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