From the end of the 2nd video sequence, the proceedure is to replace the valves/springs using the c-clamp. Then reattach the cylinder head to the engine block and reattach the rocker arm. Then place the engine cover on and replace the intake and exhaust manifolds. Reasssemble the timing gear and belts (2) (One belt connects the water and oil pump to the crankshaft, the other belt connects the injection pump camshaft rocker arm and crankshaft.
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1. Clean Parts
2. Check Parts 3. Replace parts if necessary 4. Machine parts if necessary Symptoms which suggest an overhaul is necessary 1. Smoky exhaust 2. Excessive oil Consumption 3. Loss of compression, hard to start (diesel) unstable or fluctuating idle speed (gasoline engine) 4. Excessive Fuel Consumption 5. Engine Knocking 6. Low Oil Pressure (65-80 psi is normal) 7. Overheating Low oil pressure may be because bearings are worn out, once the engine is hot the pressure drops because the viscosity of the oil is reduced. Measure piston ring gaps, should be 10 and 12 thousanths of an inch- if larger they need to be replaced. To remove intake and exhaust valves from cylinder head, use a c-clamp with a lever attached. Clamp on over the valve spring and pull lever to press down and release the nut and the spring and valves will be released. Grind intake and exhaust valves so they are flush , to prevent loss of compression. After Re-assembly 6-8hrs to break in the engine. Then need to retighten cylinder head bolts and reset valve gaps. Cylinder head (and also connecting rod and crank shaft) are tightened with a torque wrench. Check bearings and bearing shells. On crankshaft may need resurfacing in which case an undersize bearing may be needed. If the cylinders are re-bored or grinded (gasoline engines) then may need oversizes piston rings to ensure compression. Cylinder liners may be replaced also if required in diesel engines. When replacing piston rings, the openings must be on opposite sides (u.....n around the piston)) This shows the first part of the process, dismantling and cleaning the components. The engine is rusted up a bit as it was flooded in the Ondoy Typhoon 1 year ago, so a bit of a challenge ! Part 2, the rebiuld to follow next week |
Automotive Notes
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