Hyundai 21310-3C300 Pump Assembly-Oil

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For the 2007 and earlier models, start with the removal of timing belt/chain; secondly the oil pan to install oil pickup and gasket. Next, loosen and then take out the access plug that is found on the left side of the engine block and then with a screwdriver, make sure it penetrates the block at least 2 ½ inch to balance the shaft. Subsequently, remove the endplate assembly, the balance shaft and oil pump sprocket bolt, the front case or oil pump housing. Subsequently, the oil pump cover, as well as the oil pump gears, should be pulled out from the assembly. Scrape of all existing sealant and the old gasket material from the pump body and engine block to the extent possible and clean the mating surfaces with brake system cleaner. Check the oil pump for signs of wear or damage; if so or there is doubt regarding the object's condition one should fit a new one. Feelers can be slipped under the two pieces of metal to get a measurement with which to compare the clearances. When installing, pack the pump chamber with a little fresh clean engine oil that is poured into the suction side of the oil pump and while doing so, the drive gear shaft is rotated. Align the two timing marks of the oil pump gears to face each other in the same straight line. If required fit new oil seals, and ensure proper gaskets are used new ones should be fitted especially the O-ring of the front case. Loosening of bolts should be done successively in stages, crossing across each bolt to prevent them from warping, and then tighten the lower drive sprocket retaining bolt. Replace all worn out timing belts, fill the engine to the required level, engage the engine, examine oil pressure, and leakage. However, on the models which are manufactured from 2010 and onwards, the oil pump is integrated within the balance shaft module and they are sold together; any of the two cannot be replaced independently of the other.

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.

Install the oil pump case with a new gasket, then install the mounting bolts and tighten them to the specified torque.

Raise the vehicle and support it securely on jackstands.