To set the timing on an Isuzu KB250, first ensure the engine is at top dead center (TDC) on the compression stroke for cylinder one. Then, align the timing marks on the crankshaft and the camshaft as specified in the service manual. Adjust the distributor position to align with the specified timing mark, usually found on the front of the engine or on the timing cover. Finally, secure the distributor and check the timing with a timing light, making any necessary adjustments.
To fix the heater in a 2012 Isuzu KB250, start by checking the coolant level, as low coolant can prevent proper heating. Inspect the thermostat to ensure it's functioning correctly; if it's stuck open or closed, it may need replacement. Additionally, check the heater core for blockages or leaks and ensure the heater control valve is operating properly. If these components are in good condition, consider checking the blower motor and electrical connections for any issues.