Engine oil leak

[Michigankubota]

My 2650 developed a oil leak last May at around 50-60 hours. I’ve cleaned it up and it comes back after about an hour of run time. I brought it in a week ago. Anyone have this oil leak like this? The oil filter is not the issue. A friend has the same tractor with more hours with the same leak but never brought it in.
I believe it’s the oil pan.

 

[Roadworthy]

You could try tightening your oil pan bolts. They don't have to be real tight but they should be the same tightness. Use a torque wrench for the operation. The Kubota specs should state the proper torque.

 

[Michigankubota]

You could try tightening your oil pan bolts. They don't have to be real tight but they should be the same tightness. Use a torque wrench for the operation. The Kubota specs should state the proper torque.

I did try this early on. No luck.

 

[Michigankubota]

Stopped by the dealer today to see if they looked at my tractor yet. After almost 3 weeks they said I’m the next one in line.
They had 2 used tractors like mine for sale with the same leak. That’s the 3rd one not including mine that leaks oil from the oil pan area that I’ve seen..

 

[NHSleddog]

How old is your tractor?

 

[Michigankubota]

How old is your tractor?

Was new in December.

 

[NHSleddog]

Was new in December.

Mine as well. I am going to be doing some work on it later and will look for a leak. I have 300+ hrs on it.

How much oil does it go through?

 

[Roadworthy]

You could demand a warranty fix. From the pictures it appears to be a stamped steel pan so they could have gotten a bad run of them. At the next oil change you could pull the pan for a close inspection paying close attention to whether the top surface it flat and true. It's also possible a new oil pan gasket would solve the problem. You could add a very thin bead of RTV.

 

[armylifer]

I have seen oil leaks like this develop due to the engine not being run for enough time to thoroughly warm up the oil. The pan gaskets don't get hot enough to seal properly. This was most common back when cork gaskets were used. The problem can still exhibit on newer engines for the same reason. My advise is to run the tractor for an extended period of time to get the engine operating at full normal temperature to ensure that the gaskets seal.

 

[Michigankubota]

I have seen oil leaks like this develop due to the engine not being run for enough time to thoroughly warm up the oil. The pan gaskets don't get hot enough to seal properly. This was most common back when cork gaskets were used. The problem can still exhibit on newer engines for the same reason. My advise is to run the tractor for an extended period of time to get the engine operating at full normal temperature to ensure that the gaskets seal.

The oil pan is sealed Using RVT. The front engine case does use some type of gasket.

 

[Michigankubota]

You could demand a warranty fix. From the pictures it appears to be a stamped steel pan so they could have gotten a bad run of them. At the next oil change you could pull the pan for a close inspection paying close attention to whether the top surface it flat and true. It's also possible a new oil pan gasket would solve the problem. You could add a very thin bead of RTV.

It’s in for the repair now. they've had the tractor going on 4 weeks next Monday. The front of the tractor needs to be disassembled somewhat to remove the pan. That’s a good point on the stamping of the pans.

 

[Michigankubota]

Mine as well. I am going to be doing some work on it later and will look for a leak. I have 300+ hrs on it.

How much oil does it go through?

I never had to add to it yet, but I didn’t want it to get that far.

 

[SidecarFlip]

Kubota don't use 'Blue Glue' (RTV) on anything, they use 'Grey Glue' (3 Bond), which actually is better. Not sure you pan has a gasket. Kubota substitutes 3 Bond for gaskets in many places. Sounds to me like the pan needs resealed.

 

[Michigankubota]

Kubota don't use 'Blue Glue' (RTV) on anything, they use 'Grey Glue' (3 Bond), which actually is better. Not sure you pan has a gasket. Kubota substitutes 3 Bond for gaskets in many places. Sounds to me like the pan needs resealed.

You are correct, it’s Grey or ultra Grey sealant.

 

[whitetiger]

You are correct, it’s Grey or ultra Grey sealant.

Its ThreeBond 1206C RTV silicone

 

[Michigankubota]

The dealer is replacing my oil pan. I’m assuming it was warped? I’m hopeful I’ll see it this week.

 

[Michigankubota]

After 6.5 weeks at the dealer and a new oil pan, I still have the same oil leak. I mentioned to the service writer it seemed the oil Was coming from the front engine cover. A $25 gasket.
Now they have to tear the tractor apart again. This time there lending me a free loaner with a blower while mine is getting fixed.

 

[Michigankubota]

Dropped my tractor off today to fix the oil leak again. The dealer gave me another B2650 to use while my repairs are being done. The unit I have now has 367 hrs and has the same engine leak. Is this normal on these B series tractors?

 

[sheepfarmer]

I have a B2650 so tend to read posts about them and don’t recall any others. Anyone else?

 

[whitetiger]

Dropped my tractor off today to fix the oil leak again. The dealer gave me another B2650 to use while my repairs are being done. The unit I have now has 367 hrs and has the same engine leak. Is this normal on these B series tractors?

The only engine oil leaks I ever see on a B series are the engine oil pressure sender and the tach drive gasket. I service on average 1 or more a week.