Hyundai 21310-3C300 Pump Assembly-Oil

For models from 1999 through 2005, begin by removing the timing belt, followed by the oil pan to access the oil pickup and its gasket. Next, remove the access plug on the left side of the engine block and use a screwdriver to lock the balance shaft into position. After that, take out the left balance shaft and oil pump sprocket bolt, then remove the front case and oil pump housing. Detach the oil pump cover and lift out the oil pump gears, ensuring to scrape off any sealant and old gasket material from the pump body and engine block, followed by cleaning the mating surfaces. Inspect the oil pump for wear; if there are any concerns, replacing it is advisable, and clearances can be measured with a feeler gauge. For installation, position the oil pump gears while aligning the timing marks, then prime the pump with petroleum jelly. Install new oil seals and gaskets, including the O-ring in the front case, and tighten the bolts in a criss-cross pattern to avoid warping. Secure the lower drive sprocket retaining bolt and reinstall the timing belts. Finally, add oil to the correct level, start the engine, and check for oil pressure and leaks. For models from 2006 and later, the oil pump is integrated into the balance shaft module, which must be removed as part of the timing chain removal procedure, and the entire module needs to be replaced since the oil pump is not serviced separately.

For removing the oil pump on 2.5L and 2.7L engines, it is required to loose the power supply by disconnecting the cable of the battery's negative terminal, proceed with the removal of timing belt, the oil filter, the oil filter bracket and gasket, the crankshaft sprocket, the oil pressure relief plug including the spring and valve plunger, and lastly, the oil pump case lying at the Subsequently, the cover of the oil pump should be unbolted and hence, removing the installer and outer gears as well as the pump rotors. That is why the body of the pump and the surface of the block of spare engines should be absolutely clean. For the 3.3L engine, secure the vehicle on jackstands, refer to the engine oil pan removal section and proceed to also remove the oil pump chain cover and the oil pump sprocket so as to remove the oil pump as a unit. Visually and by touch examine all the components for signs of wear and damage, paying special attention to the oil pressure relief valve and to the spring that goes with it should they need to be replaced, it is recommended that both are replaced simultaneously. You should then use dial indicators or other appropriate tools to measure the clearances of the driven rotor-to-body, rotor side, and rotor tip. In the case of each car with a 3.3L engine, if there are problems expected with the oil pump, change the pump. When installing the crankshaft seals on the 2.5L and 2.7L engines pry out the old one apply grease or oil to the new one than drive it in. Insert the driven and drive rotors into the body of the pump, fill the empty spaces with the petroleum jelly and place the cover that needs a new gasket or RTV sealant; fasten it by tightening the screws in a crosswise manner. Hell with the oil pressure relief valve and place it in the position of the engine case, then clean the cover of the case gasket and place the oil pump case on it, using a new gasket, and lock the bolt. For the 3.3 L engine, change the oil pump O-ring and tighten the bolts and also the drive chain sprocket. Reinstall all the remaining parts in a backward manner, install the oil and turn on the engine to check for possible leaking and the engine oil pressure, check the level of the engine oil.

Check the sliding surface and valve spring; if either is damaged, they must be replaced as a set.

Pour a small amount of clean engine oil into the inlet side of the oil pump and turn the drive gear shaft.