EduFirm

Removal of Oil Pump, Replenishment of Engine Oil and Changing of Oil Filter

Removal of Oil Pump - Remove the drain plug fitted at the bottom of sump and drain the oil in a suitable container. Loosen and remove the sump securing bolt and take out the sump. Unlock the clamp securing strainer and remove bolts of strainer at the pump inlet. Loosen and remove the pump mounting bolts and take out pump. While removing oil pump, first remove distributor cover and note the position of distributor rotor so that, pump may be installed without disturbing the ignition timing.

Removal of Oil Pump

Oil Cooler - The oil cooler is held with four bolts in the brackets welded to the frame of the water radiator. Remove the oil cooler from the vehicle, wash it with a degreasing solvent, then with hot water, and check it for tightness. The tightness check should be conducted under air pressure of 4 Kg/Sq. cm in a water bath. Soldering to leaky point with soft solder should eliminate the discovered leak. Minor defects of radiator frame can be fixed by welding with subsequent dressing. The number of blocked tubes should not be exceeding more than three.

Replenishment of Engine Oil - For changing the oil, warm up the engine and drain the engine oil by opening the drain plug. After draining the engine oil tighten the drain plug. Pour the light flushing oil in the engine. Run the engine for few minutes with the flushing oil in the sump, then stop the engine and drain the flushing oil. Never use kerosene or gasoline for flushing purpose because of their low viscosity. Finally tighten the drain plug and refill with fresh lubricating oil of suitable specifications as recommended by the manufacturer of the vehicle.

Replacing of Engine Oil

After filling the engine oil, run the engine at medium speed until the lubricating system is filled with oil. Then stop the engine and wait for oil to settle down. Pull and wipe out the oil dipstick, insert it all the way back and pull out again. Determine the oil level by the marks on the dipstick. The oil level should be at the height of the top mark of the dipstick.

Checking of Oil Level

Changing of Oil Filter - Loosen the oil filter with the help of filter wrench. Discard old filter and replace with new one. Before fitting new filter lubricate oil seal of new filter with the layer of lubricating oil and fill the filter with lubricating oil.

Removal of Filter

Oil Filter

Filling of Filter

Removal & Installation of Oil Sump

One of the most important fluids in an engine. It lubricates and cools the moving parts of the engine. The oil change cycle for an engine is a function of driving conditions and should be changed as scheduled by the manufacturer of the vehicle. It is important to monitor oil properties to gauge the necessity of a decrease in the oil change interval.

Removal of Oil Sump. Drain out the engine oil. Unscrew bolts of clutch housing cover and take it off. Unscrew oil sump bolts, remove sump and gasket. If gasket fails to come off easily, detach it with a screwdriver or knife.

Engine Oil Drain

Oil Sump Bolt

Installation of Oil Sump. Before installing the oil sump, make sure that there are no foreign articles inside the engine. Coat the lower portion of the cylinder liberally with oil and lubricate the piston, pins, main and big end bearings on the outside.

Sump Removed Engine

Put the gasket on the joint between the cylinder block and the oil sump. Blow the sump with compressed air and install it on the cylinder block. Screw in the bolts washers by hand and tighten them with a socket wrench.

Installation of Oil Sump

Faults in Lubrication System (General)

Low Oil Pressure.

Causes	Remedy
Diluted or thin oil	Change oil
Oil pump strainer clogged	Clean strainer
Worn pump gear	Overhaul pump
Main and big end bearings badly worn	Replace bearings
Weak relief valve spring	Change the spring
Leak in the system	Trace and rectify
Engine over heating	Trace and rectify
Pressure gauge u/s	Replace

Excessive Oil Consumption

Causes	Remedy
External leaks	Trace and rectify
Burning oil in the combustion chamber	Check valve stem clearance, Check piston rings, change if worn out
Oil level too high	Maintain oil at correct level
Poor quality or improper viscosity of lubricating oil	Use correct grade of lubricating oil

High Oil Pressure

Causes	Remedy
Oil too thick (wrong grade)	Fill correct grade
Chocked passage of relief valve	Rectify
Relief valve pressure set too high	Set Correctly
Pressure gauge Faulty	Replace with new one

Crankcase Ventilation

It is quite possible that the product of combustion containing nitrogen, water and carbon dioxide may leak through piston rings into the crankcase. The crankcase ventilation is used in all automotive engines. It consists of passing through the crankcase a constant stream of air which picks up and carries away most of the fuel vapor and water vapor before they can condense out and dilute the lubricating oil. Air is drawn into the crankcase through the breather cap and is discharged through an outlet tube at the side of the engine. There are two type of crankcase ventilation used in automobile engines.

Open Crankcase Ventilation. In open crankcase ventilation, the crankcase vapors are exhausted into atmosphere.

Open Crankcase Ventilation

Positive Crankcase Ventilation. In positive crankcase ventilation, the crankcase vapors are returned to the engine through the intake manifold, instead of being exhausted into atmosphere. The crankcase out let tube is connected to the intake manifold just beneath the carburetor, so that the vapor are drawn into the intake manifold and utilized into the cylinder during the combustion.

Positive Crankcase Ventilation