2018 Cadillac Ats Engine Parts

This table covers the Barometric pressure sensors. Typical signs include a check-engine light for MAP or fuel-rail pressure, or a limp mode under load. A vacuum leak or a clogged reference line will fake a bad pressure sensor. Read more

One part is listed for the 2018 Cadillac Ats — ACDELCO PT3940.

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

GM GENUINE supplies the 5 Camshaft parts for the 2018 Cadillac Ats.

Listed part numbers: GM GENUINE 12677826, GM GENUINE 12677832 and GM GENUINE 12677833, plus the other parts above.

This table covers the Camshaft Alignment tools. This is a service tool, not a wear part — match the application in the notes. Read more

This group shows a single part: LISLE 37530.

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

This group shows a single part: GM GENUINE 12636316.

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

One part is listed for the 2018 Cadillac Ats — GM GENUINE 12647161.

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

3 Connecting Rod Bearing parts are listed for the 2018 Cadillac Ats, from GM GENUINE and MAHLE / CLEVITE.

This group includes GM GENUINE 12672032, GM GENUINE 19368257 and MAHLE / CLEVITE CB2033A.

This table covers the Connecting Rod bolts. Read more

This group shows a single part: GM GENUINE 11519680.

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 are listed for the 2018 Cadillac Ats, from AJUSA and SKP.

This group includes AJUSA 54323100 and SKP SKCS263761.

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

One part is listed for the 2018 Cadillac Ats — GM GENUINE 12699162.

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

2 Crankshaft Main Bearing parts for the 2018 Cadillac Ats come from GM GENUINE.

Listed part numbers: GM GENUINE 12744917 and GM GENUINE 19368254.

This table covers the Crankshaft Main Bearing Cap bolts. Read more

2 Crankshaft Main Bearing Cap Bolt parts are listed for the 2018 Cadillac Ats, from ELRING and GM GENUINE.

Part numbers include ELRING B75610 and GM GENUINE 11589001.

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

2 Crankshaft Repair Sleeve parts for the 2018 Cadillac Ats come from 2 brands — NATIONAL and WJB / INMOTION PARTS.

This group includes NATIONAL 99166 and WJB / INMOTION PARTS WS99166.

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

7 Crankshaft Seal parts for the 2018 Cadillac Ats come from 5 brands — NATIONAL, WJB / INMOTION PARTS, GM GENUINE and 2 other brands. The "Popular" part is GM GENUINE 12654010.

Listed part numbers: GM GENUINE 12654010, NATIONAL 710674 and ELRING 048390, plus the other parts above.

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

One part is listed for the 2018 Cadillac Ats — GM GENUINE 12570326.

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

4 Cylinder Head Bolt parts are listed for the 2018 Cadillac Ats, from GM GENUINE, AJUSA and FEL-PRO.

Listed part numbers: AJUSA 81082800, FEL-PRO ES73486 and GM GENUINE 11547020, plus the other parts 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

10 Cylinder Head Gasket parts are listed for the 2018 Cadillac Ats, from GM GENUINE, AJUSA, APEX and 2 other brands. GM GENUINE 12647574 carries the "Popular" badge.

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

4 Cylinder Head Gasket Set parts are listed for the 2018 Cadillac Ats, from AJUSA, ELRING, GM GENUINE and 1 other brand.

This group includes AJUSA 52613900, ELRING 049010 and GM GENUINE 12672033 and the remaining parts above.

This table covers the Engine Block drain plugs. Read more

One part is listed for the 2018 Cadillac Ats — GM GENUINE 11546667.

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

3 Engine Block Heater parts for the 2018 Cadillac Ats come from 2 brands — KAT'S HEATERS and GM GENUINE.

This group includes GM GENUINE 12587380, KAT'S HEATERS 28811 and KAT'S HEATERS 11811.

This table covers the Engine covers. Read more

One part is listed for the 2018 Cadillac Ats — TECHPRO GM1228186.

This table covers the Engine Cover grommets. Read more

This group shows a single part: 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

One part is listed for the 2018 Cadillac Ats — AJUSA 50552200.

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 for the 2018 Cadillac Ats come from 4 brands — GM GENUINE, MELLING, QUALCAST and 1 other brand.

This group includes GM GENUINE 12647868, MELLING V3468 and QUALCAST 1013468 and the remaining parts above.

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

2 Fuel Pump Camshaft Follower parts are listed for the 2018 Cadillac Ats, from GM GENUINE and WELLS.

Part numbers include GM GENUINE 12718357 and WELLS 5T5013.

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

One part is listed for the 2018 Cadillac Ats — GM GENUINE 12700427.

This table covers the Harmonic Balancer bolts. Read more

This group shows a single part: GM GENUINE 11546516.

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

This group shows a single part: GM GENUINE 12674143.

This table covers the Intake Manifold covers. Read more

One part is listed for the 2018 Cadillac Ats — GM GENUINE 12703607.

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 are listed for the 2018 Cadillac Ats, from GM GENUINE, APEX, ELRING and 2 other brands. GM GENUINE 12648665 carries the "Popular" badge.

Listed part numbers: GM GENUINE 12648665, APEX AMS13660 and ELRING 048550, plus the other 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

4 Intake Valve parts for the 2018 Cadillac Ats come from 4 brands — GM GENUINE, MELLING, QUALCAST and 1 other brand.

Listed part numbers: GM GENUINE 12647867, MELLING V3467 and QUALCAST 1013467, 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 for the 2018 Cadillac Ats come from 2 brands — GM GENUINE and ANCHOR. The "Popular" part is GM GENUINE 23340394.

Part numbers include GM GENUINE 23340394, ANCHOR 3714 and ANCHOR 3707, among others listed above.

This table covers the Motor Mount bolts. Read more

One part is listed for the 2018 Cadillac Ats — GM GENUINE 11548249.

This table covers the brackets that mount the Motor Mount. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

2 Motor Mount Bracket parts for the 2018 Cadillac Ats come from GM GENUINE.

Listed part numbers: GM GENUINE 23104518 and GM GENUINE 23104519.

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

23 Oil parts for the 2018 Cadillac Ats come from 6 brands — VALVOLINE, MOBIL, LIQUI MOLY and 3 other brands. The "Popular" part is ACDELCO 109324.

The Full Synthetic section lists 19 options from VALVOLINE, LIQUI MOLY, MOBIL and 3 other brands — full-synthetic oils. ACDELCO 109324 is listed in this group.

In the High Mileage (>75,000 Miles) grade, MOBIL and VALVOLINE supply 4 parts: oils grouped for high-mileage engines. A representative part number is MOBIL 103767.

This table covers the heat exchangers that cool engine oil. Typical signs include oil at the cooler fittings, or coolant that looks like a milkshake. Pressure-test both circuits after a cooler swap — a leak here mixes oil and coolant. Read more

3 Oil Cooler parts for the 2018 Cadillac Ats come from 2 brands — GM GENUINE and GPD.

This group includes GM GENUINE 12699658, GM GENUINE 12699659 and GPD 2611382.

This table covers the Oil Cooler Bypass valves. 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

This group shows a single part: GM GENUINE 25014612.

This table covers the gaskets that seal the Oil Cooler. 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

2 Oil Cooler Gasket parts are listed for the 2018 Cadillac Ats, from DORMAN and ELRING.

This group includes DORMAN 66219 and ELRING 836300.

This table covers the Oil Cooler lines. Typical signs include a wet fitting, a rusted pipe, or a pressure loss in this circuit. Flare or thread the new line the way the notes specify; a kinked replacement will fail early. Read more

2 Oil Cooler Line parts for the 2018 Cadillac Ats come from GM GENUINE.

Part numbers include GM GENUINE 12673649 and GM GENUINE 12673650.

This table covers the Oil Cooler Mounting kits. Read more

HAYDEN supplies both parts for the 2018 Cadillac Ats.

This group includes HAYDEN 238 and HAYDEN 153.

This table covers the Oil Dipstick tubes. Read more

3 Oil Dipstick / Tube parts for the 2018 Cadillac Ats come from GM GENUINE.

Part numbers include GM GENUINE 12672633, GM GENUINE 12667091 and GM GENUINE 12667092.

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 are listed for the 2018 Cadillac Ats, from ELRING, FEL-PRO and GM GENUINE.

Part numbers include ELRING 584210, FEL-PRO 73889 and GM GENUINE 24504031.

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

3 Oil Drain Plug parts for the 2018 Cadillac Ats come from 2 brands — DORMAN and GM GENUINE.

This group includes DORMAN 090948CD, DORMAN 090948 and GM GENUINE 55577568.

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

8 Oil Drain Plug Gasket parts are listed for the 2018 Cadillac Ats, from FEL-PRO, DORMAN, GM GENUINE and 3 other brands. FEL-PRO 70820 carries the "Popular" badge.

This group includes FEL-PRO 70820, GM GENUINE 12616850 and AJUSA 01288800 and the remaining parts above.

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

4 Oil Filler Cap parts for the 2018 Cadillac Ats come from 4 brands — ACDELCO, CALORSTAT, DORMAN and 1 other brand.

Part numbers include ACDELCO FC279, CALORSTAT OC2314 and DORMAN 90202, among others listed 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 are listed for the 2018 Cadillac Ats, from 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 Filler tubes. Read more

This group shows a single part: GM GENUINE 12674268.

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

12 Oil Filter parts for the 2018 Cadillac Ats come from 12 brands — CHAMP / LUBER-FINER, FVP, PRO-TEC and 9 other brands. The "Popular" part is MOBIL M1212A.

The Economy section lists 5 options from CHAMP / LUBER-FINER, FVP, PRO-TEC and 2 other brands — the catalog's value-priced group. CHAMP / LUBER-FINER PH1500 is listed in this group.

The High Performance / Heavy Duty section lists 1 option from MOBIL — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. MOBIL M1212A is listed in this group.

In the Standard Replacement grade, BOSCH, MOTORCRAFT, ACDELCO and 3 other brands supply 6 parts: built to original-equipment specification. A representative part number is BOSCH 3502.

This table covers the Oil Filter Remote Mounting kits. Read more

One part is listed for the 2018 Cadillac Ats — HAYDEN 292.

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

2 Oil Galley Plug parts for the 2018 Cadillac Ats come from GM GENUINE.

Part numbers include GM GENUINE 11562126 and GM GENUINE 11546667.

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

2 Oil Level Sensor parts for the 2018 Cadillac Ats come from 2 brands — GM GENUINE and WELLS.

This group includes GM GENUINE 12696433 and WELLS 5S15947.

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 for the 2018 Cadillac Ats come from 2 brands — ELRING and GM GENUINE.

Part numbers include ELRING 351330 and GM GENUINE 12638820.

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

GM GENUINE supplies the 3 Oil Pan parts for the 2018 Cadillac Ats.

This group includes GM GENUINE 12673901, GM GENUINE 12716562 and GM GENUINE 12673902.

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

3 Oil Pan Gasket parts for the 2018 Cadillac Ats come from 3 brands — ELRING, GM GENUINE and VICTOR REINZ.

Listed part numbers: ELRING 048520, GM GENUINE 12647081 and 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

This group shows a single part: GM GENUINE 12741263.

This table covers the Oil Pump bolts. Read more

One part is listed for the 2018 Cadillac Ats — GM GENUINE 11547739.

This table covers the chains that drive the oil pump. Read more

2 Oil Pump Chain parts are listed for the 2018 Cadillac Ats, from CLOYES and S.A. GEAR.

This group includes CLOYES C952 and S.A. GEAR C1135.

This table covers the Oil Pump 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

2 Oil Pump Chain Tensioner parts for the 2018 Cadillac Ats come from 2 brands — CLOYES and S.A. GEAR.

This group includes CLOYES 96040 and S.A. GEAR 91270.

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

2 Oil Pump Control Valve / Solenoid parts are listed for the 2018 Cadillac Ats, from GM GENUINE and STANDARD MOTOR PRODUCTS.

Listed part numbers: GM GENUINE 12741262 and STANDARD MOTOR PRODUCTS OPS404.

This table covers the gaskets that seal the Oil Pump. 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

ELRING supplies the 3 Oil Pump Gasket parts for the 2018 Cadillac Ats.

Listed part numbers: ELRING 048480, ELRING 048510 and ELRING 048490.

This table covers the gaskets that seal the Oil Pump Pickup Tube. 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

2 Oil Pump Pickup Tube Gasket parts are listed for the 2018 Cadillac Ats, from FEL-PRO and GM GENUINE.

Listed part numbers: FEL-PRO 73744 and GM GENUINE 12637179.