I Still Hate My Tractor II

[The Fred]

So I have 50 hours blowing snow with it and now running an 8 inch Woodmax chipper. Before the turbo install the tractor engine would die out on anything over 5 inches of wood diameter. Now with the turbo you can't kill the engine, in fact Saturday I got a large piece of Maple stuck in the flywheel and the engine kept the Rs up and smoked the belts in no time, I love the new power.


Sunday morning I was checking the fluids and found engine oil in the radiator :blacksmith:

Back to the drawing board!

Fred

[video]http://s1373.photobucket.com/user/Frednation/media/IMGP0187_zps0ad89d01.mp4.html[/video]

 

[RetiredCarGuy]

Sorry to hear this. It seems as it just could not take the boost. All of it, looks like great work, a fine machine and a real nice shop too!

Sometimes we just can't win, no matter how hard we try.

 

[kuboman]

So did you ever check the boost pressures? Obviously the head gasket let go.

 

[The Fred]

No I didn't check the pressure but the wastegate was set at factory 7 psi. Also this oil is clean, does not look like the usual combustion gas garbage, and this design cylinder head has no oil passage going to the valvetrain through an oil galley. It uses the pushrods to move oil up to the valvetrain.

The intake pipe (pressure) side of the turbo stays cold during blowing and I can hold my hand on it no problem on the hottest , hardest day I used the chipper (60f degrees ambient). My guess is a crack in the block or faulty new oil cooler.

Open to suggestions, Fred

 

[Cherokee140]

No I didn't check the pressure but the wastegate was set at factory 7 psi. Also this oil is clean, does not look like the usual combustion gas garbage, and this design cylinder head has no oil passage going to the valvetrain through an oil galley. It uses the pushrods to move oil up to the valvetrain.

The intake pipe (pressure) side of the turbo stays cold during blowing and I can hold my hand on it no problem on the hottest , hardest day I used the chipper (60f degrees ambient). My guess is a crack in the block or faulty new oil cooler.

Open to suggestions, Fred

I assume the oil cooler is inside the rad....if so, put the oil lines into a bucket of water, pressurize the rad and look for bubbles.

Also on a race car I had the oil pump and regulator went nutty and was pounding out too much pressure....I guess the weakest link was that oil cooler....this one was air.

Two things off the top of my head.

PS...I like the lights.

 

[dodge man]

7 psi isn't much, I'd look at the oil cooler first. Is the turbo water and oil cooled?

 

[The Fred]

Turbo is a factory unit from a Bobcat S-160, V-2003t engine.

My oil cooler is from a VW 1.8 turbo, I bought new. My parts supplier sold 1100 of this part number oil cooler last year and had 110 returned defective; 1% defect rate. I can only hope the cooler leaked oil into the coolant.

Gotta find time, still cleaning up the yard from all the stone I blew onto the lawn :clover::greenthumb:ha ha.

Fred

 

[bumperm]

Sold 1100, returned 110?? I think that'd be around 10%!!

Nice work, BTW.

bumper

 

[sd455dan]

Turbo is a factory unit from a Bobcat S-160, V-2003t engine.

My oil cooler is from a VW 1.8 turbo, I bought new. My parts supplier sold 1100 of this part number oil cooler last year and had 110 returned defective; 1% defect rate. I can only hope the cooler leaked oil into the coolant.

Gotta find time, still cleaning up the yard from all the stone I blew onto the lawn :clover::greenthumb:ha ha.

Fred

Well if it isn't the head gasket is it possible that it has pushed oil through a seal in the turbo and into the coolant line?? Isn't the oil cooler completely separate??

 

[kuboman]

Do you know the wastegate is working properly. 7 psi will not hurt anything so something went haywire. I know those turbos will boost well over 20 psi if allowed to.

 

[The Fred]

Sold 1100, returned 110?? I think that'd be around 10%!!

Nice work, BTW.

bumper

11 were returned defective, not 110, MYbad.

I'll check the wastegate again but I had initially checked it with a Mityvac vacuum/pressure pump and the gate opened at 7 psi. I have no reason to believe the boost is any higher.

I have to check for combustion gasses in the radiator with a sniffer still haven't done that.

The oil in the rad looks so clean I hope it is simply a bad cooler. The turbo is only oil cooled no engine coolant passage there either.

This Saturday's job, Fred

 

[rsallen]

You say the oil in the rad is clean like fresh.
Is the crank case oil also clean like out of the can?
If not how could the oil present in the rad have come from the crank case?

How much oil are we talking about?

 

[The Fred]

Maybe 1/4 cup. Oil is lighter than coolant so it all finds it's way out into the overflow tank.
I keep my engine oil clean.

Fred

 

[rsallen]

And no pressure feed past/through the head gasket for the rock train.

Bummer.

 

[sd455dan]

11 were returned defective, not 110, MYbad.

I'll check the wastegate again but I had initially checked it with a Mityvac vacuum/pressure pump and the gate opened at 7 psi. I have no reason to believe the boost is any higher.

I have to check for combustion gasses in the radiator with a sniffer still haven't done that.

The oil in the rad looks so clean I hope it is simply a bad cooler. The turbo is only oil cooled no engine coolant passage there either.

This Saturday's job, Fred

i should have looked a little closer for coolant lines in and out of the turbo in the pictures you posted

Glad to hear that the Kubota is making respectable and acceptable power for you now :thumbsup:, hopefully the fix isn't a big deal


the sniffer test next should eliminate any combustion cross over contamination to radiator- but if it shows no gasses are found then i guess the question remains -where is the oil from? - can the oil present in the radiator be tested (compared) against the crankcase oil to determine if they are even the same oil?

 

[Bluegill2]

Hi Fred.

 

[The Fred]

:stirthepot:


Hey nobody said "I told you so" yet.......just sayin.

Fred, I have a sweet 5.3 aluminum engine sitting in the corner with 5K miles on it maybe that would work.

 

[dodge man]

We didn't have to, we just waited for you to say it. I'm pulling for you to find an easy fix. I'm more or less just thinking out loud here but if you never went over 7 psi of boost, I just don't see how you could have hurt anything.

 

[TexasBoy]

:stirthepot:


Hey nobody said "I told you so" yet.......just sayin.

Operative word here is, "yet".

 

[wmonroe]

It's disappointing that the tractor was putting out the power you wanted and now this. Hoping it is a simple fix.