19000-05270 PUMP ASSY, INJECTI Denso Cross

Do not use more than 55 kPa (8 psi) of air pressure in the fuel tank or damage to the tank may result.
Check for leakage at the connections between the fuel tank and the fuel transfer pump. If leaks are found, tighten the connections or replace the lines. If there are no visual leaks, remove the fuel supply line from the tank and connect it to an outside fuel supply. If this corrects the problem, the suction line (standpipe) inside the fuel tank has a leak. Fuel Injection Timing Not CorrectCheck and make necessary adjustments as in Testing and Adjusting Section of this Service Manual. Valve Adjustment Not CorrectCheck and make necessary adjustments as in Testing and Adjusting Section of this Service Manual. Intake valve lash is 0.38 mm (.015 in) and exhaust valve lash is 0.64 mm (.025 in). Defective Fuel Nozzle(s)Defective fuel nozzles will normally cause the engine to "misfire" and run rough, but can cause too much smoke with the engine still running smooth. Remove the fuel nozzles and test as in Testing and Adjusting Section of this Service Manual. Misfiring Cylinder(s)See "Misfiring And Running Rough". Coolant Leakage Into Combustion ChamberCoolant in the combustion chamber can cause white smoke. A cracked cylinder head or liner, also a defective cylinder head gasket are possible causes for this condition. Low CompressionWorn piston rings and cylinder liners lower compression pressures, this can cause white exhaust smoke.Blue Smoke
Possible Causes/Corrections Engine Oil Level Too HighDo not put too much oil in the crankcase. If the oil level in the crankcase goes up as the engine is used, check for fuel in the crankcase. See "Fuel In Crankcase Oil". Worn Valve GuidesSee the Specifications Section of this Service Manual for the maximum permissible wear of the valve guides. Worn Piston Rings And/Or Cylinder WallsWorn piston rings and/or cylinder walls can be the cause of blue smoke and can cause a loss of compression. Make a visual inspection of the cylinder walls and piston rings. If necessary, measure the cylinder walls and piston rings. For the cylinder and piston ring specifications, see the Specifications Section of this Service Manual. High wear at low mileage is normally caused by dirt coming into the engine with the inlet air. Wear Or Damage To PistonsCheck the piston ring grooves for wear. This engine has piston grooves and rings of the Keystone (taper) design. A 1U6431 Keystone Piston Ring Groove Gauge is available to check the top two ring grooves in the piston. For instruction on use of the gauge, see the subject, "Piston Rings" in the Testing And Adjusting Section of this Service Manual. Pistons which have worn grooves and pistons with damage or defects can cause blue smoke and too much oil consumption. Make sure the oil return holes under the oil ring are open.