Design issue

KiotiJohn · May 19, 2006

The only thing I can think is that the glow plug timer must not be cutting off properly and leading to burn out. I'm not sure what you would need to repair it, but I can't imagine anything else causing it.

Maybe using a block heater instead would work better.
Yep, that engine is going to smoke if it's not warm. I think that has to do more with the turbo, but I'm not sure of that.
John

KiotiJohn · May 19, 2006

The only thing I can think is that the glow plug timer must not be cutting off properly and leading to burn out. I'm not sure what you would need to repair it, but I can't imagine anything else causing it.

Maybe using a block heater instead would work better.
Yep, that engine is going to smoke if it's not warm. I think that has to do more with the turbo, but I'm not sure of that.
John

JerryG · May 19, 2006

The turbo shouldn't have anything to do with the start-up smoke unless the seals are out.

JerryG · May 19, 2006

The turbo shouldn't have anything to do with the start-up smoke unless the seals are out.

KiotiJohn · May 19, 2006

( The turbo shouldn't have anything to do with the start-up smoke unless the seals are out. )
Don't turbos require more warming and cool down than other engines? I would think they would smoke for a little longer on start up than others, and that has been what I've seen on turbos, but I've never owned one.

It seems they smoke, white, for a while longer than mine, for sure.

Any engine is going to smoke if the valve seats are leaking or seals are bad, but this is a newer tractor and shouldn't have that problem.

Any thoughts Jerry, on what is causing his burn out problem? I can't think of anything else, unless maybe an intermittent short that is not breaking the circuit? It's baffling.
John

KiotiJohn · May 19, 2006

( The turbo shouldn't have anything to do with the start-up smoke unless the seals are out. )
Don't turbos require more warming and cool down than other engines? I would think they would smoke for a little longer on start up than others, and that has been what I've seen on turbos, but I've never owned one.

It seems they smoke, white, for a while longer than mine, for sure.

Any engine is going to smoke if the valve seats are leaking or seals are bad, but this is a newer tractor and shouldn't have that problem.

Any thoughts Jerry, on what is causing his burn out problem? I can't think of anything else, unless maybe an intermittent short that is not breaking the circuit? It's baffling.
John

Highbeam · May 19, 2006

Well I can at least share truck engine experience. A non-turbo engine runs a compression ratio in the 27:1 area on say a ford or chevy non-turbo truck engine. The turbo versions of these engines run a 17:1 or so compression ratio. You can add a turbo to a non-turbo diesel engine but the cylinder pressures end up very high and can lead to early failure.

Perhaps this is the same deal with the compression ratios of our tractor engines being lower on the turbo versions. Less compression means less heat, less heat means a colder and less complete combustion of diesel, and that leads to smoke until the enigne heats up.

Highbeam · May 19, 2006

Well I can at least share truck engine experience. A non-turbo engine runs a compression ratio in the 27:1 area on say a ford or chevy non-turbo truck engine. The turbo versions of these engines run a 17:1 or so compression ratio. You can add a turbo to a non-turbo diesel engine but the cylinder pressures end up very high and can lead to early failure.

Perhaps this is the same deal with the compression ratios of our tractor engines being lower on the turbo versions. Less compression means less heat, less heat means a colder and less complete combustion of diesel, and that leads to smoke until the enigne heats up.

Dmace · May 20, 2006

Highbeam has a very good analogy of the engine types. Now the question is how soon does the turbo spool and build boost on these tractors. The compression ratio is lower on turbocharged engines because once the turbo builds boost (compressed air) and forces it into the cylinders, it raises the compression ratio. So do these diesels build enough exhaust pressure at idle to spool the turbo or are they stagnant until higher rpms ?

Dmace · May 20, 2006

Highbeam has a very good analogy of the engine types. Now the question is how soon does the turbo spool and build boost on these tractors. The compression ratio is lower on turbocharged engines because once the turbo builds boost (compressed air) and forces it into the cylinders, it raises the compression ratio. So do these diesels build enough exhaust pressure at idle to spool the turbo or are they stagnant until higher rpms ?