Toyota 15103-0P010 Rotor Set, Oil Pump

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First of all, to remove the oil pump, you can take off the oil pan, timing belt, lower timing belt idler pulley, and crankshaft sprocket. Also, remove the oil pick-up tube, alternator, compressor bracket, power steering pump adjusting bar, and lower timing belt idler pulley. Detach the oil pump, and remove the O-ring and oil pressure relief valve components. When you are installing the oil pump make sure you grease the seal's outer edge and insert it into place. Lubricate the oil pressure relief valve with engine oil and install the valve components.

On 2008 and later models, the oil pump cannot be serviced separately from the timing chain cover; if defective, both must be replaced as a unit. To remove the oil pump, first take off the timing chain and crankshaft sprocket, then remove the oil pump drive chain and sprockets by rotating the engine 90 degrees counterclockwise from TDC, setting the crankshaft key to the left horizontal position, and loosening the retaining bolt while locking the lower gear in place. Next, detach the oil pump body by removing three bolts, prying carefully if necessary, and clean all traces of sealant and old gasket material from the pump body and engine block. Inspect the oil pump and chain for wear and damage; if there are signs of wear, replacement is recommended. Measure the diameter of the sprockets across the chain rollers, and if below the minimum diameter, replace the chain and sprockets. Check the oil jet for blockages to prevent excessive wear. For installation, lubricate the pump cavity with clean engine oil, position the oil pump with a new gasket against the block, and install the mounting bolts, tightening them in a crisscross pattern. Install the drive chain and sprockets, ensuring the colored links align with the marks on the drive gears, then tighten the lower drive sprocket retaining bolt. Reinstall the remaining parts in reverse order, add oil to the proper level, start the engine, and check for oil pressure and leaks.

To remove the timing chain cover the first thing is to take off the oil pump is installed internally on the cover. There is a 27mm socket that is used to take off the reliefs valve plug followed by the removal of the spring and the relief valve. Then, the bolts of the oil pump cover and this cover, the oil pump drive rotor and the driven rotor are removed. Wipe all components with solvent and check parts for sign of wear and damage, make sure the oiled relief valve is free to move in its bore. Check the oil pressure relief valve sliding surface and its valve spring also, if they are bad, have to replace both together. Assess the amounts of the clearance of the driven rotor-to-body, rotor side, and rotor tip by applying a feeler gauge and do comparisons with the templates. Any worn out parts should be changed or the whole assembly of the oil pump in case it is damaged. To install pry out the old crankshaft seal from the timing chain cover and then lubricate the outer edge of the new crank seal with multi-purpose grease or engine oil and then slide in the seal. Using a grinder apply oil to the seal lip and for the pump, apply petroleum jelly to the pump drive and the driven rotors before aligning them in the timing chain cover with the pump marks facing outwards. Lubricate the pump cavity with petroleum jelly to ease the process of priming; put the cover and fasten the bolts. Coat the oil pressure relief valve with fresh engine oil, put the valve and its spring back to the top of the pump housing and the plug as well. Lastly, replace the timing chain cover; to put back all what you removed you do it in the sequence of the removal; add oil and put a new filter before starting the engine to check if there is any leakage.

Before installing the oil pump, you should use a scraper to remove any sealant or gasket material from the pump body and engine block. Additionally, clean the mating surfaces.

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.

To install the drive chain and sprockets:Align colored links on the chain with alignment marks on the drive gears.Tighten the lower drive sprocket retention bolt to the specified torque.

Take out the oil pump drive rotor and driven rotor.

Remove the old crankshaft seal from the timing chain cover and replace it with a new one, applying grease or oil to the outer edge and seal lip.

Apply a coat of petroleum jelly to the pump drive and driven rotors, then place the two rotors into position in the timing chain cover, ensuring that the pump marks (dimples) are facing out.

Position a new O-ring on the block.

Remove the oil pressure relief plug, valve spring, and valve from the oil pump cover.

Remove the power steering pump adjusting bar and pry the pump away from the oil pump body.

Pack the pump cavities with petroleum jelly - this will help prime the pump when the engine is first started. Install a new O-ring in the groove in the timing chain cover (Be sure to replace the O-ring in the bottom of the timing chain cover) and attach the pump, tightening the screws to the torque.

Tighten the cover screws securely following a criss-cross pattern.

Install the timing chain cover.