Bad engine

[rdsaustintx]

Why (oh why) would Bota use a rubber plug rather than a conventional, cup-shaped metal "dutch" plug??

 

[First one]

Wouldn't you think that Kubota knowing this could happen would have made good on repairs do to this defect? Sorry to hear what happend ,hope they'll help you out somehow!!

 

[irvingj]

That sounds scary! Has anyone --can anyone-- get some pics of this plug? Anybody seen or heard of its use on any other engines?

 

[IH3444]

When I first read this, knew exactly what it was, and what had happened. An oil gallery plug has popped or blown out. Have seen this before. You need to contact Kubota, and find out if they are going to help you with this. This usually occurs on a very cold morning start up, with the possibly of the oil pressure relief valve sticking in it's bore also, due to extreme cold weather shrinking the bore. This causes the oil pressure to rocket well over 100psi. This has also been know to blow off oil filter gaskets, and pumping oil out of sump rapidly. These plugs are driven in at the factory, and are a plug to close off a passage which was drilled into the block to route the oil to front of engine for areas up front which need oiling. An old "hot rodder" trick is to remove all plugs, tap holes and install red loctited allen plugs, so there is no way the engine can blow the plugs out. Good Luck with Kubota. I personally think if no human error on your part can be found, then the factory should stand behind their workmanship on plug installation.
It would be good to know what area you are located in, and what was the weather for the day it happened. Pictures?

 

[pdowling1]

It is common practice to tap such holes and seal them with socket head plugs. They NEVER fall out. For the factory to seal it with a drive in plug seems very foolish to me.

 

[First one]

TRACTORMAN-DOWN,
I'm sure I'm not the only one wanting to know if you got a hold of Kubota to see if there going to help you out ,or what they say about your problem with that plug coming out.If you do get a answer back from them, would you be so kind to let the rest of us know how you make out? Hope everything goes good for you!!!

 

[IH3444]

It is common practice to tap such holes and seal them with socket head plugs. They NEVER fall out. For the factory to seal it with a drive in plug seems very foolish to me.

Standard practice for an engine manufacturer to do this. The rate of failure is extremely low, and the cost to tap every drilled passage, and install an allen hex head plug is expensive. They have cost accountants run the numbers, and it's cheaper to just plug them there blocks.

All's good until its your block that blows a plug. We all have this practice in all our engines......

 

[jimmer2880]

A good temporary fix, may be to get a boat drain plug. If I remember correctly, they are about 1" in diameter. Some of them are screw-compression style that should stay in for a little while until you get everything together for a more permenant solution (like drilling & taping as others have said).

 

[bstrom]

What happened to Tractorman -Down? You out there? You back up yet?

 

[bstrom]

When I first read this, knew exactly what it was, and what had happened. An oil gallery plug has popped or blown out. Have seen this before. You need to contact Kubota, and find out if they are going to help you with this. This usually occurs on a very cold morning start up, with the possibly of the oil pressure relief valve sticking in it's bore also, due to extreme cold weather shrinking the bore. This causes the oil pressure to rocket well over 100psi. This has also been know to blow off oil filter gaskets, and pumping oil out of sump rapidly. These plugs are driven in at the factory, and are a plug to close off a passage which was drilled into the block to route the oil to front of engine for areas up front which need oiling. An old "hot rodder" trick is to remove all plugs, tap holes and install red loctited allen plugs, so there is no way the engine can blow the plugs out. Good Luck with Kubota. I personally think if no human error on your part can be found, then the factory should stand behind their workmanship on plug installation.
It would be good to know what area you are located in, and what was the weather for the day it happened. Pictures?

Sounds like a good argument for using a block heater on those very cold startups too.

 

[bp fick]

What happened to Tractorman -Down? You out there? You back up yet?

Tractorman appears to be down.

 

[Kubota 2350]

I dunno who designed it that way, but they need a swift kick in the pills!

:thumbsup: