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  #1  
Old 04-01-2013, 06:33 PM
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Default kubota D640 head oil leak

Well the 1782 has had some interesting po mods and a few things that had to be taken care of and one being the oil leak at the back of the head between the block and head closest to the water pump. Found that from the manual that there is a rubber o ring that is supposed to be around a metal nipple for oil transportation to the head. When taken apart it was confirmed that it wasn't there. Looks like the bottom end was recently rebuilt. Not sure that it was a bit aggressive rebuild as the piston is stamped .050 but the cross hatching is still very noticeable and very little normal wear!! Kinda excited about that but a little concerned about the 50 over.

On to the pics
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Old 04-01-2013, 06:57 PM
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Wow wonder why they had to go all the way to 50 over? Sucks that you have to get into it already. Upside is you will probably never have to do it again.
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Old 04-01-2013, 08:31 PM
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Yeah hopefully not to be touched again!! No idea why 50 over i have a diesel mechanic for aa friend and will ask if it makes any since to him.
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1782 smoker!!, 169 and parts 128
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Old 04-01-2013, 09:00 PM
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It's probably better to know whats in there. For piece of mind anyway. I wonder how many cc displacement now with it 50 over.
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  #5  
Old 04-02-2013, 01:07 AM
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Got it all buttoned back up and running good!! I'm beginning to really like this diesel! Can't wait to actually work with it a little.
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1782 smoker!!, 169 and parts 128
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Old 04-02-2013, 08:14 AM
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Quote:
Originally Posted by ajcombs View Post
Got it all buttoned back up and running good!! I'm beginning to really like this diesel! Can't wait to actually work with it a little.
Now you are an “Official Diesel Mechanic “
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Old 04-02-2013, 11:06 AM
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Glad it's running good for you!
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Old 04-02-2013, 11:09 AM
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Adam I'm glad you got it fixed! Sucks that a silly o-ring had worried about the engine.
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Old 04-02-2013, 10:53 PM
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I'm thinking since it is metric, it is oversize .50 MM about .010 tho'
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Old 04-03-2013, 01:01 AM
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I'm thinking since it is metric, it is oversize .50 MM about .010 tho'
Oh nice catch i bet you are right.
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