2018 Chevrolet Impala Engine Parts

This table covers the chains that drive the balance shafts. Read more

6 Balance Shaft Chain parts for the 2018 Chevrolet Impala come from 4 brands — CLOYES, MELLING, GM GENUINE and 1 other brand. The "Popular" part is CLOYES C919.

In the Chain Only grade, CLOYES, MELLING, GM GENUINE and 1 other brand supply 4 parts: grouped under the catalog's "Chain Only" designation — the notes column spells out what sets them apart. A representative part number is CLOYES C919.

The Kit section lists 2 options from CLOYES and MELLING — grouped under the catalog's "Kit" designation — the notes column spells out what sets them apart. CLOYES 90919S is listed in this group.

Part numbers include CLOYES C919, MELLING 1094 and GM GENUINE 12626983, among others listed above.

This table covers the guides that keep the balance-shaft chain on its path. Read more

5 Balance Shaft Chain Guide parts for the 2018 Chevrolet Impala come from 5 brands — MELLING, CLOYES, FVP and 2 other brands. The "Popular" part is MELLING BG5150.

Part numbers include MELLING BG5150 and CLOYES 95953, among others listed above.

This table covers the Balance Shaft Chain tensioners. Typical signs include belt flutter, a chirp that returns after a new belt, or an arm that no longer damps. Replace the tensioner with the belt at higher mileage. Read more

5 Balance Shaft Chain Tensioner parts are listed for the 2018 Chevrolet Impala, from GM GENUINE, CLOYES, FVP and 2 other brands. GM GENUINE 12626984 carries the "Popular" badge.

Listed part numbers: GM GENUINE 12626984 and CLOYES 95952, plus the other parts above.

This table covers the Balance Shaft sprockets. Read more

5 Balance Shaft Sprocket parts for the 2018 Chevrolet Impala come from 5 brands — MELLING, CLOYES, FVP and 2 other brands. The "Popular" part is MELLING S1370.

Listed part numbers: MELLING S1370 and CLOYES S1101, plus the other parts above.

This table covers the camshafts that open the valves. Read more

2 Camshaft parts for the 2018 Chevrolet Impala come from GM GENUINE.

Part numbers include GM GENUINE 12638651 and GM GENUINE 28290131.

This table covers the seals at each camshaft end. 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

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 12574477.

This table covers the Circular / Semi-Circular plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 11588547.

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

This group shows a single part: GM GENUINE 12674412.

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

This group shows a single part: GM GENUINE 12668645.

This table covers the Connecting Rod bolts. Read more

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 11548927.

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

2 Conversion / Lower Gasket Set parts for the 2018 Chevrolet Impala come from 2 brands — AJUSA and ELRING.

Listed part numbers: AJUSA 54229400 and ELRING 927950.

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

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 12668646.

This table covers the sleeves used to restore a grooved crankshaft seal surface. Read more

4 Crankshaft Repair Sleeve parts are listed for the 2018 Chevrolet Impala, from BCA, NATIONAL, SKF and 1 other brand.

This group includes BCA NS99353 and NATIONAL 99353 and the remaining parts above.

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

15 Crankshaft Seal parts are listed for the 2018 Chevrolet Impala, from GM GENUINE, ELRING, FEL-PRO and 10 other brands. FEL-PRO BS40739 carries the "Popular" badge.

This table covers the Cylinder Head Alignment Dowel pins. Read more

This group shows a single part: GM GENUINE 12570326.

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

4 Cylinder Head Bolt parts for the 2018 Chevrolet Impala come from 3 brands — GM GENUINE, AJUSA and ELRING.

Part numbers include AJUSA 81065100, ELRING 821950 and GM GENUINE 11610687, among others listed above.

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

6 Cylinder Head Gasket parts for the 2018 Chevrolet Impala come from 6 brands — APEX, GM GENUINE, AJUSA and 3 other brands. The "Popular" part is APEX AHG1358.

This group includes APEX AHG1358, GM GENUINE 12648979 and AJUSA 10262300 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

5 Cylinder Head Gasket Set parts for the 2018 Chevrolet Impala come from 5 brands — GM GENUINE, AJUSA, APEX and 2 other brands. The "Popular" part is GM GENUINE 12659927.

Listed part numbers: GM GENUINE 12659927, AJUSA 52606000 and APEX AHS13058, plus the other parts above.

This table covers the block heaters that warm the coolant or oil in cold weather. Read more

3 Engine Block Heater parts are listed for the 2018 Chevrolet Impala, from KAT'S HEATERS and GM GENUINE.

This group includes GM GENUINE 12586687, KAT'S HEATERS 11484 and KAT'S HEATERS 28510.

This table covers the Engine Cover bolts. Read more

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 11611795.

This table covers the Engine Cover grommets. Read more

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 12737359.

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

This group shows a single part: AJUSA 50548800.

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

4 Exhaust Valve parts are listed for the 2018 Chevrolet Impala, from GM GENUINE, MELLING, QUALCAST and 1 other brand.

Listed part numbers: GM GENUINE 12627156, MELLING V3442 and QUALCAST 1013442, plus the other parts above.

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

3 Fuel Pump Camshaft Follower parts for the 2018 Chevrolet Impala come from 3 brands — GM GENUINE, STANDARD MOTOR PRODUCTS and WELLS.

Listed part numbers: GM GENUINE 12718357, STANDARD MOTOR PRODUCTS GDF102 and WELLS 5T5013.

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

5 Harmonic Balancer parts for the 2018 Chevrolet Impala come from 5 brands — SKP, GM GENUINE, ATP and 2 other brands. The "Popular" part is GM GENUINE 25202078.

The Economy section lists 1 option from SKP — the catalog's value-priced group. SKP SK594713 is listed in this group.

In the Standard Replacement grade, GM GENUINE, ATP, DORMAN and 1 other brand supply 4 parts: built to original-equipment specification. A representative part number is GM GENUINE 25202078.

This group includes GM GENUINE 25202078, SKP SK594713 and ATP 102479 and the remaining parts above.

This table covers the Harmonic Balancer bolts. Read more

2 Harmonic Balancer Bolt parts are listed for the 2018 Chevrolet Impala, from DORMAN and GM GENUINE.

Listed part numbers: DORMAN 917139 and GM GENUINE 12557840.

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

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 12631021.

This table covers the Intake Manifold bolts. Read more

This group shows a single part: GM GENUINE 11588352.

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

5 Intake Manifold Gasket parts for the 2018 Chevrolet Impala come from 5 brands — GM GENUINE, APEX, ELRING and 2 other brands. The "Popular" part is GM GENUINE 12655276.

This group includes GM GENUINE 12655276, APEX AMS13570 and ELRING 564350 and the remaining parts above.

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

3 Intake Valve parts are listed for the 2018 Chevrolet Impala, from GM GENUINE, MELLING and QUALCAST.

Listed part numbers: GM GENUINE 12662527, MELLING V3441 and QUALCAST 1013441.

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

8 Motor Mount parts are listed for the 2018 Chevrolet Impala, from PIONEER, SKP, VAICO and 4 other brands. SKP SKM3393 carries the "Popular" badge.

Economy: 2 parts, from SKP and VAICO. A representative part number is SKP SKM3393.

The Standard Replacement section: 6 options from PIONEER, GM GENUINE, ANCHOR and 2 other brands. GM GENUINE 23144105 is listed in this group.

Listed part numbers: SKP SKM3393, VAICO V402409 and GM GENUINE 23144105, plus the other parts above.

This table covers the Motor Mount bolts. Read more

This group shows a single part: GM GENUINE 11570514.

This table covers the Motor Mount kits. Read more

One part is listed for the 2018 Chevrolet Impala — ANCHOR 300519.

This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable. Read more

29 Oil parts are listed for the 2018 Chevrolet Impala, from VALVOLINE, LIQUI MOLY, MOBIL and 2 other brands. ACDELCO 109302 carries the "Popular" badge. Grades run from Full Synthetic through High Mileage (>75,000 Miles); Full Synthetic is the most populated section, led by LIQUI MOLY, VALVOLINE, LUCAS OIL and 2 other brands.

This table covers the Oil Dipstick tubes. Read more

2 Oil Dipstick / Tube parts are listed for the 2018 Chevrolet Impala, from DORMAN and GM GENUINE.

This group includes DORMAN 918828 and GM GENUINE 12654077.

This table covers the seals at the Oil Dipstick / Tube. 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

3 Oil Dipstick / Tube Seal parts for the 2018 Chevrolet Impala come from 3 brands — ELRING, FEL-PRO and GM GENUINE.

This group includes ELRING 584210, FEL-PRO 73889 and GM GENUINE 24504031.

This table covers the drain plugs in the oil pan. Read more

5 Oil Drain Plug parts are listed for the 2018 Chevrolet Impala, from DORMAN, GM GENUINE, ELRING and 1 other brand. GM GENUINE 55577568 carries the "Popular" badge.

Listed part numbers: GM GENUINE 55577568, DORMAN 090948CD and DORMAN 090948, plus the other parts above.

This table covers the crush washers and gaskets under the oil drain plug. 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 Oil Drain Plug Gasket parts for the 2018 Chevrolet Impala come from 8 brands — FEL-PRO, DORMAN, GM GENUINE and 5 other brands. The "Popular" part is FEL-PRO 70820.

This table covers the caps on the oil filler neck. Read more

4 Oil Filler Cap parts are listed for the 2018 Chevrolet Impala, from CALORSTAT, ACDELCO and MOTORAD.

Listed part numbers: ACDELCO FC257, CALORSTAT OC2314 and CALORSTAT OC2332, plus the other parts above.

This table covers the gaskets that seal the Oil Filler Cap. 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

4 Oil Filler Cap Gasket parts for the 2018 Chevrolet Impala come from 3 brands — ELRING, FEL-PRO and GM GENUINE.

Listed part numbers: ELRING 592250, ELRING 823620 and FEL-PRO 73193, plus the other parts above.

This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive. Read more

16 Oil Filter parts are listed for the 2018 Chevrolet Impala, from FVP, WIX, ACDELCO and 9 other brands. WIX WL10290XP carries the "Popular" badge.

Economy: 5 parts, from CHAMP / LUBER-FINER, FRAM, FVP and 2 other brands. A representative part number is CHAMP / LUBER-FINER PH10064.

In the High Performance / Heavy Duty grade, WIX and MOBIL supply 2 parts: grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. A representative part number is WIX WL10290XP.

The Standard Replacement section: 9 options from ACDELCO, MAHLE / CLEVITE, BOSCH and 4 other brands. ACDELCO PF64 is listed in this group.

This table covers the Oil Galley plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 11588547.

This table covers the Oil Level sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

5 Oil Level Sensor parts are listed for the 2018 Chevrolet Impala, from GM GENUINE, STANDARD MOTOR PRODUCTS, ULTRA-POWER and 2 other brands. GM GENUINE 12696434 carries the "Popular" badge.

Listed part numbers: GM GENUINE 12696434 and STANDARD MOTOR PRODUCTS PS616, plus the other parts above.

This table covers the Oil Level Sensor Gasket O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

2 Oil Level Sensor Gasket / O-Ring parts are listed for the 2018 Chevrolet Impala, from ELRING and GM GENUINE.

Listed part numbers: ELRING 351330 and GM GENUINE 12638820.

This table covers the Oil nozzles. Read more

2 Oil Nozzle parts are listed for the 2018 Chevrolet Impala, from GM GENUINE and MELLING.

This group includes GM GENUINE 12627113 and MELLING 5468N.

This table covers the oil pans that hold the engine's oil sump. Read more

5 Oil Pan parts for the 2018 Chevrolet Impala come from 4 brands — GM GENUINE, DORMAN, SKP and 1 other brand. The "Popular" part is GM GENUINE 12676340.

This group includes GM GENUINE 12676340, DORMAN 264880 and GM GENUINE 28289985 and the remaining parts above.

This table covers the gaskets between the oil pan and the block. 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 2018 Chevrolet Impala — VICTOR REINZ 703141410.

This table covers the Oil pumps. Typical signs include noise from the pump, no pressure, or fluid that never arrives at the outlet. Prime or fill the pump as the notes require. A dry start is a common way to kill a new unit. Read more

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 12674460.

This table covers the Oil Pump 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

4 Oil Pump Control Valve / Solenoid parts for the 2018 Chevrolet Impala come from 4 brands — DORMAN, GM GENUINE, HOLSTEIN and 1 other brand.

Part numbers include DORMAN 926238, GM GENUINE 12670746 and HOLSTEIN 2VTS0611, among others listed above.

This table covers the pistons that travel in each cylinder. Typical signs include knock, blow-by, or a cylinder that will not hold compression. Piston work is a short-block job. Match bore, pin and ring pack in the notes — not the photo. Read more

2 Piston parts for the 2018 Chevrolet Impala come from GM GENUINE.

Listed part numbers: GM GENUINE 12627170 and GM GENUINE 12652807.

This table covers the Piston Pin retainers. Read more

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 01647383.

This table covers the rings that seal each piston to the cylinder wall. Read more

6 Piston Ring parts for the 2018 Chevrolet Impala come from 3 brands — GM GENUINE, HASTINGS MANUFACTURING and SEALED POWER. The "Popular" part is SEALED POWER E1024KC.

In the Premium grade, SEALED POWER supplies 1 part: a step above OE specification in materials, tolerances or warranty terms. A representative part number is SEALED POWER E1024KC.

Standard Replacement: 5 parts, from GM GENUINE and HASTINGS MANUFACTURING. A representative part number is GM GENUINE 12665165.

This group includes SEALED POWER E1024KC, GM GENUINE 12665165 and GM GENUINE 19301821 and the remaining parts above.

This table covers the rocker arms that transfer cam motion to the valves. Read more

One part is listed for the 2018 Chevrolet Impala — GM GENUINE 12693909.

This table covers the timing chains that keep the cams in time with the crank. Read more

5 Timing Chain parts for the 2018 Chevrolet Impala come from 5 brands — GM GENUINE, CLOYES, FVP and 2 other brands. The "Popular" part is GM GENUINE 12627107.

This group includes GM GENUINE 12627107 and CLOYES C918 and the remaining parts above.

This table covers kits that group a timing chain with the related tensioners and guides. Read more

15 Timing Chain & Component Kit parts are listed for the 2018 Chevrolet Impala, from CLOYES, MELLING, ULTRA-POWER and 3 other brands. CLOYES 90918SA carries the "Popular" badge.

Economy: 6 parts, from ULTRA-POWER, PREFERRED COMPONENTS INC and GATES. A representative part number is GATES CHK129.

The Standard Replacement section: 9 options from CLOYES, MELLING and INA. CLOYES 90918SA is listed in this group.

This table covers the guides and dampers that keep the timing chain on its path. Read more

12 Timing Chain Guide / Damper parts for the 2018 Chevrolet Impala come from 4 brands — GM GENUINE, CLOYES, MELLING and 1 other brand. The "Popular" part is GM GENUINE 12627184.

This table covers the tensioners that keep the timing chain taut. Typical signs include belt flutter, a chirp that returns after a new belt, or an arm that no longer damps. Replace the tensioner with the belt at higher mileage. Read more

5 Timing Chain Tensioner parts are listed for the 2018 Chevrolet Impala, from GM GENUINE, CLOYES, FVP and 2 other brands. GM GENUINE 12627109 carries the "Popular" badge.

Part numbers include GM GENUINE 12627109 and CLOYES 95947, among others listed above.

This table covers the seals at the Timing Chain Tensioner Gasket. 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

2 Timing Chain Tensioner Gasket / Seal parts for the 2018 Chevrolet Impala come from 2 brands — ELRING and GM GENUINE.

This group includes ELRING 935720 and GM GENUINE 12627110.