Ram›4500 / 5500 Cab›2018›6.7L Diesel/ram/4500-5500-cab/2018/6-7l-diesel/

DP platform

2018 Ram 4500 / 5500 Cab — 6.7L Diesel

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 4500 / 5500 Cab 6.7L Diesel.

Engine 6.7L Diesel

The 2018 Ram 4500/5500 Cab on the DP platform is powered by a 6.7‑liter diesel engine that runs on 12.0 quarts of 5W‑40 or 15W‑40 oil, underscoring its heavy‑duty credentials. This model year carries the same robust powertrain as its predecessors but benefits from a slightly refined hydraulic system, a detail highlighted by the top complaint area. With only eight owner complaints in total and a manageable seven recalls, the 2018 entry sits comfortably within a period of reliable performance, indicating that while occasional brake and hydraulic issues arise, the overall durability of the vehicle remains strong for its class.

Model year2019 2018 2017 2016 2015 2014

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity12.0 qtOEM · verified

Engine oil type5W-40 / 15W-40OEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI H7 · 730 CCA battery, OE oil filter 04892339BE. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI H7 · 730 CCAOEM · verified

OE service part numbers OEM · verified

Engine oil filter	04892339BE alt 05083285AA
Engine air filter	68190705AB alt 53034051AB
Fuel filter	68197867AB alt 68157291AA
Spark plug	SP138239AC
Battery	BBH7F001AA
Front wiper blades	55277446AB
Serpentine belt	04627751AA alt 04627589AA
Thermostat	68534176AA alt 05086740AA
Cabin air filter	68535623AA

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 12.0 qt of 5W-40 / 15W-40 engine oil, DOT 3 brake fluid. The firing order is 1-8-4-3-6-5-7-2.

Lubricants & capacities

Automatic Transmission Fluid	ATF+4
Automatic Transmission Fluid Capacity	5.0-7.5
Automatic Transmission Fluid	ATF
Automatic Transmission Fluid Capacity	7.2
Automatic Transmission Fluid	Mopar ZF Automatic transmission fluid
Automatic Transmission Fluid Capacity	8.8-9.0
Brake Fluid	DOT 3
Differential Gear Oil Capacity	215FD Front Axle

Engine torques

Crankshaft Position (CKP) Sensor Bolt(s)	7.4 ft-lbs
Camshaft Sprocket and/or Gear Bolt(s)	72.0 ft-lbs
Engine Coolant Temperature (ECT) Sensor Bolt(s)	13.0 ft-lbs
Engine Flywheel Bolts	101.0 ft-lbs
Intake Manifold to Engine Bolts	9 ft-lbs
Intake Manifold to Engine Bolts	18 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	39 ft-lbs
Nitrogen Oxide (NOX) Sensor Bolt(s)	37.0 ft-lbs

Ignition

Cylinder Firing Order	1-5-3-6-2-4
Cylinder Firing Order	1-8-4-3-6-5-7-2
Spark Plug Manufacturer	Mopar
Spark Plug Gap	.043 in

Battery & A/C

Standard BCI Group Number	H7
Standard BCI Cranking Performance	730 cca

Service checks

Fuel Pump Pressure Minimum	56.0 psi
Fuel Pump Pressure Maximum	60.0 psi
Regulated Fuel System Pressure (With Vacuum)	56.0-60.0 psi

Brakes

Brake Caliper Bolt to Carrier Torque	98
Brake Caliper Carrier to Hub Bolt Torque	460
Vented Rotor Minimum Thickness for Replacement	1.472
Variation from Parallelism Thickness Variation	.0004
Maximum Rotor Runout	.0009

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 3 stages

1	22.0 ft. lbs.	22 ft. lbs
2	44.0 ft. lbs.	44 ft. lbs
3	60.0

Cylinder Head — tightening sequence 1 stages

Bolts 1-10

25 ft. lbs

Cylinder Head — tightening sequence 5 stages

1	52 ft. lbs.	52 ft. lbs
2	Back off 1 turn
3	77 ft. lbs.	77 ft. lbs
4	recheck torque, 77 ft. lbs.	77 ft. lbs
5	Turn 90

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 3 stages

1	12 ft. lbs.	12 ft. lbs
2	22 ft. lbs.	22 ft. lbs
3	22

Main Bearings — tightening sequence 5 stages

Prep Do not reuse old bolts

1	89.0 ft. lbs.	89 ft. lbs
2	Loosen all bolts completely
3	44.0 ft. lbs.	44 ft. lbs
4	63.0 ft. lbs.	63 ft. lbs
5	120.0

Oil Pump to Cylinder BLock Bolts/Studs — tightening sequence 3 stages

1	Tighten all bolts finger tight
2	72.0 inch lbs.	72 in
3	18.0

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Every 7,500 mi	Diesel Emissions Fluid (inspect fluid level) · Suspension System (inspect) · Tire & Wheel Assembly (rotate)
Every 12,500 mi	Engine Air Filter Element (inspect)
Every 15,000 mi	Fuel Filter (replace)
Every 22,500 mi	Accessory Drive Belt (inspect)
At 30,000 mi	Transmission Assembly (drain & refill)
Every 30,000 mi	Wheel Bearing (inspect)
Every 60,000 mi	Transmission Assembly (drain & refill)
Every 67,500 mi	Engine Breather Filter (replace)
Every 97,500 mi	Power Steering System (drain & refill)

Owner how-tos

Condensed service procedures for routine maintenance. Procedures that require dealer diagnostic equipment are identified and summarized only.

Common procedures

Key fob — remote (RKE) programming programming new fob buttons Dealer tool OEM · verified

Tool required	DRBIII scan tool (dealer / locksmith)
Why	Transmitter codes are written into the receiver in the passenger door module

Anti-theft (SKIS) — module initialization after immobilizer module replacement Dealer tool OEM · verified

When needed	After Sentry Key Immobilizer Module (SKIM) replacement
Tool required	DRBIII scan tool
Also required	The vehicle's four-digit PIN code

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Owner complaints about the 2018 Ram 4500 / 5500 Cab dominate in one area — the service brakes, hydraulic, 3 of 8 reports (38%), well ahead of the next concern. That matters, because the service brakes, hydraulic are also the target of recall 18V-277 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the service brakes, hydraulic pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

Open recalls

NHTSA campaigns

371

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

0 involved a crash · 0 a fire

Owner complaints filed with NHTSA, by component

All 8 complaints on record, top 6 components.

Service Brakes, Hydraulic3

Service Brakes,Forward Collision Avoidance1

Steering,Service Brakes, Hydraulic,Service Brakes1

Service Brakes, Hydraulic,Engine & Engine Cooling1

Service Brakes1

Power Train,Wheels1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 7 campaigns on record for this vehicle.

18V277000Service Brakes, Hydraulic:Foundation Components:Hoses, Lines/Piping, And FittingsReported 01/05/2018

Chrysler (FCA US LLC) is recalling certain 2018 RAM 4500 and 5500 cab chassis trucks. The primary and secondary brake hoses located between the brake master cylinder and the hydraulic control unit may have been… Remedy: Chrysler will notify owners, and dealers will inspect the brake hoses and replace them if necessary, free of charge. The recall began June 19, 2018. Owners may contact Chrysler…

18V332000Electrical System:WiringReported 17/05/2018

Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and… Remedy: Chrysler will notify owners, and dealers will inspect the software, and perform a software flash on the engine or powertrain control module, free of charge. The recall began June…

Technical service bulletins NHTSA · verified

Showing 5 of 371 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
S2208000045 REV.D	2026-06-26	Structure	Backup Camera Poor Image Quality Inspection
S1203000003 REV.A	2026-06-26	Service Brakes	Trac-Rite Operation Diagnosis, Chatter, Shudder, Moving From A Stop And Turning
112906	2026-06-17	Engine	BEARING - CRANKSHAFT THRUST and KIT
112906	2026-06-17	Engine	BEARING - CRANKSHAFT THRUST and KIT
S1623000028 Rev. K	2026-06-12	Electrical System	Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P2002

Diesel particulate filter efficiency below threshold — Bank 1

P0401

Exhaust gas recirculation (EGR) flow insufficient

P20EE

SCR NOx catalyst efficiency below threshold — Bank 1

P0087

Fuel rail / system pressure too low

P0299

Turbocharger / supercharger underboost condition

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN

Decode a VIN to confirm the transmission and build data for a specific 4500 / 5500 Cab. OEM

Build data

Plant, GVWR class, engine and body data for any 17-character VIN.

Recalls

Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group H7 battery Vehicles taking 12.0 qt DP-platform vehicles Engine oil filter 04892339BE Engine air filter 68190705AB Fuel filter 68197867AB Spark plug SP138239AC

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 2018 4500 / 5500 Cab 6.7L Diesel take?

12.0 qt of Below 0 degreesF 5W-40, Above 0 degreesF: 15W-40 Use oil meeting Chrysler standard MS-10902 or equivalent, per the factory manual.

Does the 2018 4500 / 5500 Cab have open recalls?

NHTSA lists 7 recall campaign(s) for this model year. Check your specific vehicle by VIN.