Kubota V1702 engine - Is 200-250 PSI too low compression to run?

[Bob435]

I have several Kubota engines various equipment some with several thousand hours on it. My skid loader has the V1702 engine. Only had to rebuild one - an eBay special Onan genset due to overheating.

First make sure valves adjusted to spec.

If you are using proper compression (injector/glow plug) adapter and getting these pressure results 200, 230, 230, 250PSI. Most likely cylinder bore, rings and piston worn out. If you pressurized a cylinder with compress air, you should heard air leaking into the crank case.

How many hours on the engine? If the air filter failed or no filter - it will wear out the cylinder bore (taper), rings (excessive ring gap), piston (excessive piston/bore clearance). Possible overheated at some time thus scored piston/bore.

Do all the testing first before you start tearing into engine.

Some of the USB borescopes have a very small camera may take a peek inside.

Not sure of your abilities in engine repairs but will know cause after pulling the head off.

Let us know what you find out.

Bob G.

 

[AnotherBueller]

Stop so much starter fluid! It's washing the oil from the cylinder walls.

In a compression ignition engine WITH a GLOW PLUG, using ether AKA starting fluid, is asking for damage to to the piston, valves and the head. NEVER EVER do it.

 

[AnotherBueller]

I have several Kubota engines various equipment some with several thousand hours on it. My skid loader has the V1702 engine. Only had to rebuild one - an eBay special Onan genset due to overheating.

First make sure valves adjusted to spec.

If you are using proper compression (injector/glow plug) adapter and getting these pressure results 200, 230, 230, 250PSI. Most likely cylinder bore, rings and piston worn out. If you pressurized a cylinder with compress air, you should heard air leaking into the crank case.

How many hours on the engine? If the air filter failed or no filter - it will wear out the cylinder bore (taper), rings (excessive ring gap), piston (excessive piston/bore clearance). Possible overheated at some time thus scored piston/bore.

Do all the testing first before you start tearing into engine.

Some of the USB borescopes have a very small camera may take a peek inside.

Not sure of your abilities in engine repairs but will know cause after pulling the head off.

Let us know what you find out.

Bob G.

While you are doing everything above listen for air leaks in the adjoining cylinders. This can help diagnose head gasket issues.