2020 Kia Optima Engine Parts

This table covers the connecting rods between each piston and the crankshaft. Read more

3 Connecting Rod parts for the 2020 Kia Optima come from TOPLINE.

This group includes TOPLINE CRHY22T, TOPLINE CRHY23L and TOPLINE CRHY20S.

This table covers the bearings in the connecting-rod big ends. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

10 Connecting Rod Bearing parts for the 2020 Kia Optima come from 4 brands — KING ENGINE BEARINGS, TOPLINE, ITM ENGINE COMPONENTS and 1 other brand. The "Popular" part is ITM ENGINE COMPONENTS 4B2024.

The High Performance section lists 1 option from KING ENGINE BEARINGS — engineered beyond original-equipment specification. KING ENGINE BEARINGS CR4634XP is listed in this group.

In the Standard Replacement grade, KING ENGINE BEARINGS, ITM ENGINE COMPONENTS and TOPLINE supply 4 parts: built to original-equipment specification. A representative part number is ITM ENGINE COMPONENTS 4B2024.

5 further parts sit outside the graded sections, with the same engine-level match.

This table covers lower / conversion gasket sets for oil-pan and related joints. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

8 Conversion / Lower Gasket Set parts for the 2020 Kia Optima come from 3 brands — AJUSA, TOPLINE and MAHLE / CLEVITE.

Listed part numbers: AJUSA 54244600, AJUSA 54308100 and AJUSA 54311100, plus the other parts above.

This table covers the crankshafts that turn piston motion into rotation. Read more

2 Crankshaft parts for the 2020 Kia Optima come from TOPLINE.

Listed part numbers: TOPLINE CSHY22T and TOPLINE CSHY23R.

This table covers the main bearings that support the crankshaft in the block. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

10 Crankshaft Main Bearing parts are listed for the 2020 Kia Optima, from TOPLINE, KING ENGINE BEARINGS and ENGINETECH.

High Performance: 1 part, from KING ENGINE BEARINGS. A representative part number is KING ENGINE BEARINGS MB5771XP.

The Standard Replacement section: 3 options from TOPLINE and KING ENGINE BEARINGS. KING ENGINE BEARINGS MB5707SI is listed in this group.

6 ungrouped parts are not assigned to a grade, with the same engine-level match.

This table covers the front and rear seals that keep oil in at the crankshaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

16 Crankshaft Seal parts are listed for the 2020 Kia Optima, from AJUSA, MAHLE / CLEVITE, VICTOR REINZ and 3 other brands. AJUSA 15052700 carries the "Popular" badge.

This table covers the bolts that clamp the cylinder head to the block. Read more

15 Cylinder Head Bolt parts for the 2020 Kia Optima come from 7 brands — FEL-PRO, AJUSA, TOPLINE and 4 other brands. The "Popular" part is ENGINETECH HB307.

This table covers the head gaskets that seal the block to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

9 Cylinder Head Gasket parts for the 2020 Kia Optima come from 4 brands — AJUSA, APEX, ELRING and 1 other brand.

This group includes AJUSA 10239000, AJUSA 10251400 and AJUSA 10252100 and the remaining parts above.

This table covers multi-piece gasket sets for a cylinder-head job. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

10 Cylinder Head Gasket Set parts for the 2020 Kia Optima come from 6 brands — AJUSA, MAHLE / CLEVITE, TOPLINE and 3 other brands.

This table covers the Engine covers. Read more

5 Engine Cover parts for the 2020 Kia Optima come from 2 brands — TECHPRO and VARIOUS MFR.

Listed part numbers: TECHPRO KI1228168, TECHPRO KI1228164 and TECHPRO KI1228163, plus the other parts above.

This table covers full gasket kits covering the joints opened in an engine rebuild. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

5 Engine Kit Gasket Set parts for the 2020 Kia Optima come from 2 brands — AJUSA and TOPLINE.

Part numbers include AJUSA 50527000, AJUSA 50523600 and AJUSA 50530800, among others listed above.

This table covers the exhaust valves that let combustion gas out of the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

6 Exhaust Valve parts are listed for the 2020 Kia Optima, from TOPLINE, MELLING and HYUNDAI.

Listed part numbers: HYUNDAI 222122E000, MELLING V5571 and MELLING V5833, plus the other parts above.

This table covers the followers that drive a mechanical fuel pump off the camshaft. Read more

This group shows a single part: WELLS 5T5017.

This table covers the crankshaft pulleys / harmonic balancers at the front of the engine. Read more

5 Harmonic Balancer parts for the 2020 Kia Optima come from 4 brands — HYUNDAI, ATP, DAYCO and 1 other brand.

Listed part numbers: ATP 102474, DAYCO PB1761N and HL MANDO 30A5034, plus the other parts above.

This table covers the Intake manifolds. Typical signs include an exhaust tick, a vacuum leak, or a gasket that has burned through. Replace the gaskets and hardware; a warped flange will leak with a new gasket alone. Read more

2 Intake Manifold parts are listed for the 2020 Kia Optima, from HYUNDAI and KIA.

This group includes HYUNDAI 283102GTA1 and the remaining parts above.

This table covers the gaskets between the intake manifold and the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

10 Intake Manifold Gasket parts for the 2020 Kia Optima come from 6 brands — AJUSA, FEL-PRO, MAHLE / CLEVITE and 3 other brands.

This table covers the Intake Manifold Runner Control Valve solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid. Read more

2 Intake Manifold Runner Control Valve / Solenoid parts for the 2020 Kia Optima come from 2 brands — SKP and STANDARD MOTOR PRODUCTS.

Listed part numbers: SKP SKIMRC6 and STANDARD MOTOR PRODUCTS IMRC6.

This table covers the gaskets that seal the Intake Plenum. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2020 Kia Optima — ELRING 853640.

This table covers the intake valves that let air (and fuel, on port-injected engines) into the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

9 Intake Valve parts are listed for the 2020 Kia Optima, from TOPLINE, HYUNDAI, MELLING and 2 other brands.

Listed part numbers: HYUNDAI 222112B400, HYUNDAI 222112E400 and MELLING V5564, plus the other parts above.

This table covers the mounts that hold the engine to the chassis. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

5 Motor Mount parts are listed for the 2020 Kia Optima, from PIONEER, SKP and ANCHOR.

In the Economy grade, SKP supplies 1 part: the catalog's value-priced group. A representative part number is SKP SKM10047.

The Standard Replacement section: 3 options from PIONEER and ANCHOR. ANCHOR 10047 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

This group includes SKP SKM10047, ANCHOR 10047 and PIONEER 611001 and the remaining parts above.

This table covers the Motor Mount kits. Read more

One part is listed for the 2020 Kia Optima — ANCHOR 300877.