2021 Ram 2500 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

2 Barometric Pressure Sensor parts are listed for the 2021 Ram 2500, from HOLSTEIN and STANDARD MOTOR PRODUCTS.

In the Economy grade, HOLSTEIN supplies 1 part: the catalog's value-priced group. A representative part number is HOLSTEIN 2MAP0143.

The Standard Replacement section lists 1 option from STANDARD MOTOR PRODUCTS — built to original-equipment specification. STANDARD MOTOR PRODUCTS AS414 is listed in this group.

Listed part numbers: HOLSTEIN 2MAP0143 and STANDARD MOTOR PRODUCTS AS414.

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

MELLING supplies the 6 Camshaft parts for the 2021 Ram 2500. MELLING 23108 carries the "Popular" badge.

In the High Performance grade, MELLING supplies 4 parts: engineered beyond original-equipment specification. A representative part number is MELLING 23108.

The Standard Replacement section: 2 options from MELLING. MELLING MC1438 is listed in this group.

This group includes MELLING 23108, MELLING 23107 and MELLING 23207 and the remaining parts above.

This table covers the Camshaft bearings. 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 Camshaft Bearing parts are listed for the 2021 Ram 2500, from ENGINETECH and MAHLE / CLEVITE.

Listed part numbers: ENGINETECH CC487 and MAHLE / CLEVITE SH2191S.

This table covers the Camshaft 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 Camshaft Plug parts are listed for the 2021 Ram 2500, from MELLING and MOPAR.

Listed part numbers: MELLING MEP334 and MOPAR 6507663AA.

This table covers the Camshaft Retainer / Thrust plates. Typical signs include warpage, cracks, or a plate that no longer locates the assembly. Confirm which plate the notes describe — backing plates, clutch plates and strike plates are different parts. Read more

2 Camshaft Retainer / Thrust Plate parts for the 2021 Ram 2500 come from 2 brands — MELLING and MOPAR.

Part numbers include MELLING MD200 and MOPAR 53022178AE.

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

9 Connecting Rod Bearing parts are listed for the 2021 Ram 2500, from MAHLE / CLEVITE and ENGINETECH. ENGINETECH BB111J carries the "Popular" badge.

High Performance: 2 parts, from MAHLE / CLEVITE. A representative part number is MAHLE / CLEVITE CB1808HXN.

The Standard Replacement section: 6 options from MAHLE / CLEVITE and ENGINETECH. ENGINETECH BB111J is listed in this group.

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

Part numbers include ENGINETECH BB111J, MAHLE / CLEVITE CB1808HXN and MAHLE / CLEVITE CB1808HN, among others listed above.

This table covers the Connecting Rod bolts. Read more

This group shows a single part: MOPAR 6508245AA.

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

4 Conversion / Lower Gasket Set parts are listed for the 2021 Ram 2500, from AJUSA, MAHLE / CLEVITE and MOPAR.

Part numbers include AJUSA 54321300, AJUSA 54325700 and MAHLE / CLEVITE CS55525, among others listed above.

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

MOPAR supplies both parts for the 2021 Ram 2500.

This group includes MOPAR 5038339AE and MOPAR 5038339AG.

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

11 Crankshaft Main Bearing parts for the 2021 Ram 2500 come from 3 brands — MAHLE / CLEVITE, MOPAR and ENGINETECH. The "Popular" part is MAHLE / CLEVITE MS2328H.

The High Performance section: 5 options from MAHLE / CLEVITE. MAHLE / CLEVITE MS2328H is listed in this group.

Standard Replacement: 6 parts, from MOPAR, MAHLE / CLEVITE and ENGINETECH. A representative part number is ENGINETECH BC118J.

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

2 Crankshaft Repair Sleeve parts for the 2021 Ram 2500 come from 2 brands — FEL-PRO and MAHLE / CLEVITE.

Listed part numbers: FEL-PRO 16230 and MAHLE / CLEVITE A351.

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

This group shows a single part: FEL-PRO 16328.

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

13 Crankshaft Seal parts for the 2021 Ram 2500 come from 7 brands — FEL-PRO, MAHLE / CLEVITE, MOPAR and 4 other brands. The "Popular" part is FEL-PRO BS40684.

This table covers the gaskets that seal the Crankshaft Seal. 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 2021 Ram 2500 — ELRING 049640.

This table covers the Cylinder Deactivation 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

5 Cylinder Deactivation Solenoid parts for the 2021 Ram 2500 come from 4 brands — DORMAN, CLOYES, STANDARD MOTOR PRODUCTS and 1 other brand. The "Popular" part is DORMAN 916592XD.

Listed part numbers: DORMAN 916592XD, CLOYES VTS237 and DORMAN 916593, plus the other parts above.

This table covers the cylinder heads that close the top of the block. Read more

2 Cylinder Head parts for the 2021 Ram 2500 come from MOPAR.

Listed part numbers: MOPAR 68280508AE and MOPAR 68280509AE.

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

One part is listed for the 2021 Ram 2500 — MOPAR 5203466.

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

6 Cylinder Head Bolt parts are listed for the 2021 Ram 2500, from AJUSA, ARP and MAHLE / CLEVITE.

Part numbers include AJUSA 81076700, AJUSA 81084000 and ARP 2474202, 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

13 Cylinder Head Gasket parts are listed for the 2021 Ram 2500, from MAHLE / CLEVITE, VICTOR REINZ, FEL-PRO and 4 other brands. FEL-PRO 26568PT 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

7 Cylinder Head Gasket Set parts are listed for the 2021 Ram 2500, from AJUSA, ELRING and MAHLE / CLEVITE.

Listed part numbers: AJUSA 52604200, AJUSA 52623000 and AJUSA 52648800, plus the other parts above.

This table covers the Cylinder Head 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

This group shows a single part: MOPAR 4556020AB.

This table covers the Cylinder Head Spacer shims. Read more

One part is listed for the 2021 Ram 2500 — SBI 2302176.

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

This group shows a single part: MOPAR 5149022AC.

This table covers the Engine covers. Read more

MOPAR supplies the 7 Engine Cover parts for the 2021 Ram 2500. 5 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: MOPAR 68196979AA, MOPAR 4861784AB and MOPAR 68196978AA, 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

4 Engine Kit Gasket Set parts are listed for the 2021 Ram 2500, from AJUSA and MOPAR.

Listed part numbers: AJUSA 50548200, AJUSA 50556600 and AJUSA 50575500, plus the other parts 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

5 Exhaust Valve parts for the 2021 Ram 2500 come from 4 brands — SBI, ENGINETECH, MELLING and 1 other brand.

This group includes ENGINETECH V3645, MELLING V3161 and MOPAR 4893173AE and the remaining parts above.

This table covers the Expansion 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

4 Expansion Plug parts are listed for the 2021 Ram 2500, from MELLING and MOPAR.

Listed part numbers: MELLING MPE903BR, MELLING MPE902BR and MOPAR 68060349AA, plus the other parts above.

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

3 Harmonic Balancer parts are listed for the 2021 Ram 2500, from MOPAR and DAYCO.

Part numbers include DAYCO PB1718N, MOPAR 53022083AA and MOPAR 4893285AA.

This table covers the Harmonic Balancer bolts. Read more

This group shows a single part: ARP 1472503.

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: MOPAR 68585863AA.

This table covers the Intake Manifold actuators. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same. Read more

One part is listed for the 2021 Ram 2500 — MOPAR 4861795AC.

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

11 Intake Manifold Gasket parts are listed for the 2021 Ram 2500, from ELRING, MAHLE / CLEVITE, AJUSA and 2 other brands. ELRING 049780 carries the "Popular" badge.

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

This group shows a single part: AJUSA 01698000.

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

6 Intake Valve parts for the 2021 Ram 2500 come from 4 brands — MELLING, SBI, ENGINETECH and 1 other brand.

This group includes ENGINETECH V3644, MELLING V5821 and MELLING V2014 and the remaining 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

11 Motor Mount parts for the 2021 Ram 2500 come from 3 brands — ANCHOR, DEA / MARMON RIDE CONTROL and PIONEER. The "Popular" part is ANCHOR 3563.

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

This group shows a single part: MOPAR 68413695AA.

This table covers the isolators in an engine mount. Read more

MOPAR supplies the 3 Motor Mount Isolator parts for the 2021 Ram 2500.

Part numbers include MOPAR 68362401AB, MOPAR 68349283AB and MOPAR 68505095AA.

This table covers the Motor Mount kits. Read more

4 Motor Mount Kit parts for the 2021 Ram 2500 come from ANCHOR.

Part numbers include ANCHOR 300866, ANCHOR 300897 and ANCHOR 300971, among others listed above.

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

19 Oil parts for the 2021 Ram 2500 come from 5 brands — VALVOLINE, LIQUI MOLY, MOBIL and 2 other brands. The "Popular" part is VALVOLINE 774038.

The Full Synthetic section lists 3 options from VALVOLINE and MOPAR — full-synthetic oils. VALVOLINE 774038 is listed in this group.

The Heavy Duty / Diesel section lists 2 options from LIQUI MOLY and MOBIL — grouped under the catalog's "Heavy Duty / Diesel" designation — the notes column spells out what sets them apart. LIQUI MOLY 20426 is listed in this group.

The Synthetic Blend section lists 2 options from VALVOLINE — synthetic-blend oils. VALVOLINE 818289 is listed in this group.

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

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

6 Oil Cooler parts for the 2021 Ram 2500 come from 5 brands — STANDARD MOTOR PRODUCTS, DORMAN, MOPAR and 2 other brands.

Listed part numbers: DORMAN 918410, MOPAR 4893200AC and SKP SK918335, plus the other parts above.

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

7 Oil Cooler Gasket parts are listed for the 2021 Ram 2500, from AJUSA, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

Part numbers include AJUSA 77046200, AJUSA 77062600 and ELRING 109210, among others listed above.

This table covers the Oil Cooler Hose pipes. Read more

This group shows a single part: MOPAR 68359800AA.

This table covers the Oil Dipstick tubes. Read more

4 Oil Dipstick / Tube parts for the 2021 Ram 2500 come from 3 brands — MOPAR, AUTOTECNICA and DORMAN.

Listed part numbers: AUTOTECNICA RM1421437, DORMAN 921238 and MOPAR 53021321AK, plus the other parts above.

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

2 Oil Dipstick / Tube Seal parts are listed for the 2021 Ram 2500, from ELRING and MAHLE / CLEVITE.

This group includes ELRING 097140 and MAHLE / CLEVITE 72010.

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

7 Oil Drain Plug parts for the 2021 Ram 2500 come from 5 brands — DORMAN, MOPAR, ELRING and 2 other brands. The "Popular" part is DORMAN 090172.

This group includes DORMAN 090172, DORMAN 090173 and ELRING 049720 and the remaining parts above.