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General Motors Industrial Powertrain Vortec 5.0 L Engine Engine
The General Motors Industrial Powertrain Vortec 5.0 L is a 5 L 8-cylinder natural aspiration engine rated at 1800 rpm. It powers generator sets from Kohler, including the 48RCL, 50REZG and 50RZG. It holds 6.2 L (1.6 gal) of oil and 20.8 L (5.5 gal) of coolant.
Also known as: General Motors Industrial Powertrain Vortec 5.0 L
Engine specifications
| Oil capacity | 6.2 L |
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| Coolant capacity | 20.8 L |
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| Displacement | 5.0 L |
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| Cylinders | 8 |
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| Aspiration | Natural Aspiration |
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| Rated speed | 1800 rpm |
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Generator sets powered by this engine
3Common problems
9- Rough operation
Cause: Electromagnetic interference (EMI) - Lack of Communication with Generator RBUS Accessories
Cause: An internal failure of a component in the controller can cause this communication problem.
Fix: Verify the presence of 12 VDC on the RBUS line terminals PWR and COM. Check connections and then replace the controller assembly if 12 VDC is not present on these terminals. - L1-L2 Low Voltage Shutdown during Exercise
Fix: Update the controller with software version 4.07 or higher. - Gas fuel leaks
Fix: Check the LPG vapor or natural gas fuel system for leakage by using a soap and water solution with the fuel system test pressurized to 6--8 ounces per square inch (10--14 inches water column). Do not operate the generator set in the presence of fuel leaks, fuel accumulation, or sparks. - Engine Hunting
Cause: A number of factors can result in engine hunting.
Fix: Perform the following steps: 1. Disconnect ATS to prevent automatic starting. 2. Confirm under what conditions the generator hunts. 3. Update firmware and install vent tubes on the fuel regulator as described. 4-11. Follow additional troubleshooting steps including checking Engine Speed Gain Adjustment, air intake tube, fuel source setup, fuel pressure, solenoid valve operation, and throttle plate movement. - Display Errors
Fix: Install controller software version - Cooling Fans Cycle at Low Temperatures (48RCL only)
Fix: Update the controller with software version 4.05 or higher. - Controller reset
Cause: Electromagnetic interference (EMI)
Fix: Inspect the distributor cap and rotor for specific features. Replace them if necessary with updated parts. - Battery short circuits
Fix: Disconnect the battery before generator set installation or maintenance.
Compiled from service & troubleshooting documentation across every generator set that uses the General Motors Industrial Powertrain Vortec 5.0 L.
Maintenance schedule
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Common questions
What is the oil capacity of the General Motors Industrial Powertrain Vortec 5.0 L?
The General Motors Industrial Powertrain Vortec 5.0 L engine has an oil capacity of 6.2 liters.
What is the displacement of the General Motors Industrial Powertrain Vortec 5.0 L?
The General Motors Industrial Powertrain Vortec 5.0 L has a displacement of 5.0 liters with 8 cylinders.
Which generators use the General Motors Industrial Powertrain Vortec 5.0 L engine?
The General Motors Industrial Powertrain Vortec 5.0 L powers 3 generator set(s), including Kohler 48RCL, Kohler 50REZG, Kohler 50RZG.
How often should you change the oil in the General Motors Industrial Powertrain Vortec 5.0 L?
The General Motors Industrial Powertrain Vortec 5.0 L oil change interval is every 150 hours.
What is a common problem with the General Motors Industrial Powertrain Vortec 5.0 L engine?
A commonly reported issue on generators using the General Motors Industrial Powertrain Vortec 5.0 L is: Rough operation. Cause: Electromagnetic interference (EMI).