Toyota 15103-31050 Rotor Set, Oil Pump

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First of all, detach the timing chain, crankshaft sprocket, and oil pump drive chain. Next, scrape off the sealant from the pump body and engine block. Also, check the oil pump and chain for damage. For installation, you can lubricate the pump cavity, place it with a new gasket, and tighten the bolts.

To remove the oil pump, relieve the valve plug, spring, and valve. Also, loosen and remove the oil pump cover bolts and cover, and remove the drive and driven rotor. Inspect all parts for damage. Also, apply petroleum jelly to the rotors and place them in the timing chain cover with pump marks out. Lubricate and insert the oil pressure relief valve and spring, tighten the plug, and reinstall the timing chain cover.

To begin with, to remove the oil pump, you can detach the timing chain and crankshaft sprocket. You can alter the crankshaft's position and undo the oil pump drive chain as well as the sprockets. Clean the pump body and engine block surfaces, removing old gasket material. Inspect the oil pump and drive chain for wear.

Before now, unscrew both of the timing chain cover mounting bolts and then uncouple the coupling of the oil pipe that is mounted between the timing chain cover and the block and get rid of the two worn out oil pipe O-rings. After that, use a spanner while holding the oil pump with another hand to loosen the oil pump cover bolts and thereafter, the oil pump cover, the oil pump drive rotor and the driven rotor. Remove oil pressure relief plug, valve spring and valve from the oil pump cover. Wipe all parts with solvent and have a close look at their status: the oil relief valve should move effortlessly inside its hole. Examine the contact face of the oil pressure relief valve and the valve spring; if either of the components is defective, replace them together. By using a feeler gauge measure the following; the clearance of the driven rotor to the body, the rotor side, and the rotor tip and record the values and compare. Tap out the worn out crankshaft seal by referring to the timing chain cover, and apply multi-purpose grease or engine oil on the outer lip of the new crank seal before moulding it in. Smear the seal lip with petroleum jelly and do the same for the pump drive and driven rotors and then fit these in the timing chain cover whereby the pump marks are outward. Petroleum jelly must then be packed into the pump cavity of the motor to assist in the priming process of the pump; then the cover and the bolts will have to be secured with the correct torque. Coat the rag with clean engine oil and insert the oil pressure relief valve and spring into the pump cover and tightened the plug to the right torque tightness. Last but not least, replace the timing chain cover, and after completing the installation in the reverse sequence of the removal, pour the oil into the engine, fit the new filter and start the engine for the check the signs of leakage.

Refill the engine oil and coolant. Start the engine and check for oil leaks.

Check the oil pressure relief valve sliding surface and valve spring. If either the spring or the valve is damaged, they must be replaced as a set.

Take out the oil pump drive rotor and driven rotor.

To install the oil pump:Lubricate the pump cavity with engine oil.Place the oil pump with a new gasket against the engine block.Secure it with the mounting bolts, tightening them in a criss-cross pattern.

Pack the pump cavity with petroleum jelly (this will help to prime the pump) and install the cover. Tighten the cover bolts to the torque.

During the inspection, you should clean all components with solvent and inspect for wear and damage, especially focusing on the oil pressure relief valve and its spring. Check clearances of various components using a feeler gauge as specified.

Check the oil pressure relief valve sliding surface and valve spring. If either is damaged, they must be replaced as a set.

Wrap the chain around each of the oil pump drive sprockets and measure the diameter of the sprockets across the chain rollers. If the measurement is less than the minimum sprocket diameter, the chain and the timing sprockets must be replaced.

The remainder of the installation is the reverse of removal. Add oil and install a new filter. When you're done, run the engine and check for leaks.

Lift the cover off and remove the pump rotors.

Remove the timing chain cover (the oil pump is mounted to the inside of the timing cover).