2007½–2012 DODGE / RAM 2500/3500 · 6.7L CUMMINS
2007½–2012 6.7 Cummins repair in Tucson: weak points & fixes.
The first 6.7 Cummins is strong and makes big torque, but it was also Ram’s first truck with a DPF and a variable-geometry turbo. Most of its trouble comes from soot, heat and a few known parts. Here’s what we see on these trucks and how we fix it at your location.
- 350 hp610–800 lb-ft stock
- Bosch common railVGT turbo · DPF · EGR
- 68RFE · G56transmissions
- We come to youTucson & nearby
Jump to a system
KNOW YOUR TRUCK
Which early 6.7 do you have?
Ratings and some parts changed during the run. Your year and transmission tell us what to bring.
Early 6.7
- 350 hp / 650 lb-ft with the 68RFE automatic
- 350 hp / 610 lb-ft with the G56 manual
- Holset VGT turbo with built-in exhaust brake
- First Ram with a DPF; no DEF
Higher torque
- 800 lb-ft with the 68RFE (from early 2011)
- Manual trucks stay at 610 lb-ft
- Different EGR cooler than 2007½–2009 trucks
- Still DPF and EGR, no DEF
POWER THROUGH THE YEARS
Where the 2007½–2012 6.7 Cummins fits in Cummins history.
Peak factory pickup ratings by generation, horsepower and torque. Yours is highlighted. Tap any bar to see that generation.
- Horsepower
- Torque (lb-ft)
WEAK POINTS, SYSTEM BY SYSTEM
What fails on the 2007½–2012 6.7 Cummins, and how we fix it.
Tap a system to see what fails, what you’ll notice and how we fix it. Common = we see it often. Towing / tuned = shows up with heavy loads or added power. High miles = age and wear items.
Grid heater & engine
Grid heater bolt failureCommon
You’ll notice: often nothing until it fails; a dropped bolt or nut can go into the engine.
Why: The intake grid heater is held by a small bolt and nut inside the intake. Heat and vibration can loosen it, and if it drops into cylinder 6 it can wreck the engine.
Our fix: We replace the factory grid heater setup with the Banks Monster-Ram, which removes the problem bolt and is 50-state emissions compliant on these trucks.
Exhaust manifold leaksCommonTowing / tuned
You’ll notice: ticking on cold start, exhaust smell, slower turbo response.
Why: The one-piece manifold and its bolts take a beating from heat cycles and can crack or break bolts.
Our fix: We replace failed bolts and gaskets, or install a two-piece pulse manifold built to expand without cracking.
Crankcase vent (CCV) filterHigh miles
You’ll notice: oil in the intake and intercooler, front seal leaks.
Why: A clogged CCV filter builds crankcase pressure that pushes oil where it shouldn’t go.
Our fix: We replace the CCV filter on schedule and clean up any oil it pushed into the intake.
VGT turbo & air
Sticking VGT vanes or failed actuatorCommon
You’ll notice: low power, limp mode, surging, a weak exhaust brake, turbo codes.
Why: Soot from the EGR system builds up on the turbo’s moving vanes until they stick, and the electronic actuator can fail.
Our fix: We clean and service the turbo when it can be saved, or replace the actuator or turbo with quality parts.
Boost leaksHigh miles
You’ll notice: low power, black smoke, a whistle under load.
Why: Old intercooler boots and clamps loosen and split, especially with oil from the CCV system.
Our fix: We pressure-test the intake side and replace leaking boots and clamps.
EGR, DPF & emissions
Clogged DPF and frequent regensCommon
You’ll notice: regen messages, reduced power, poor fuel economy.
Why: Short trips and idling never let the filter clean itself, and these trucks run extra fuel during regens, which can thin the oil.
Our fix: We check sensors and the cause of the soot, then clean or replace the filter as needed. We keep every truck emissions legal.
EGR cooler and valve problemsCommonTowing / tuned
You’ll notice: coolant loss, white smoke, EGR codes, rough running.
Why: Heat and soot crack or plug the EGR cooler and stick the valve.
Our fix: We replace the cooler or valve with quality parts and clean the soot that caused it.
Fuel system
Weak lift pumpCommonTowing / tuned
You’ll notice: hard starts, power loss on hills, fuel pressure codes.
Why: The in-tank lift pump feeds the high-pressure pump. When it weakens, the injection pump and injectors run starved.
Our fix: We test fuel supply and replace the pump, or upgrade to a FASS lift pump with water separation and extra filtration.
Injector wearHigh miles
You’ll notice: rough idle, smoke, a miss, fuel in the oil.
Why: Water and dirt in the fuel wear injectors over time.
Our fix: We find the bad injectors and replace them with quality new or remanufactured units.
Cooling
Radiator and cooling wearHigh milesTowing / tuned
You’ll notice: running hot when towing in summer, coolant leaks at the radiator tanks.
Why: Plastic radiator tanks crack with age and heat, and a weak fan clutch can’t keep up.
Our fix: We pressure-test the system and replace worn parts, including an XDP X-Tra Cool radiator on 2010–2012 trucks.
68RFE automatic
Converter shudder and slippingCommonTowing / tuned
You’ll notice: shudder at light throttle, slipping, flare between gears, high transmission temps.
Why: The 68RFE’s converter, valve body and clutches are the weak links behind this engine, especially with towing or more power.
Our fix: We service it with the right fluid, add a deeper pan, and repair or replace it with a Randy’s built unit or a Jasper remanufactured one, matched to your use.
Front end & steering
Death wobble and loose steeringCommonHigh miles
You’ll notice: a violent shake after a bump at highway speed, wandering, play in the wheel.
Why: Worn track bar, tie rods, ball joints and a leaking steering box let the heavy front end oscillate.
Our fix: We find every worn part and rebuild the front end with heavy-duty components, then set the alignment.
RELIABILITY UPGRADES
Bulletproof it in the right order.
If you plan to keep your early 6.7, these are the upgrades we recommend, in the order that protects the engine best.
- Banks Monster-RamRemoves the factory grid heater bolt that can drop into the engine, and improves airflow. 50-state emissions compliant.Call nowRequest a quote
- Lift pump and fuel filtrationA FASS lift pump with water separation protects the injection pump and injectors.Call nowRequest a quote
- GaugesExhaust temp, transmission temp and boost on a monitor, so you see problems early.Call nowRequest a quote
- Transmission coolingA deeper 68RFE pan and good fluid keep the transmission alive, especially towing.Call nowRequest a quote
- Front endHeavy-duty track bar, tie rods and ball joints stop death wobble before it starts.Call nowRequest a quote
- CCV and intake careKeeping the crankcase vent filter fresh keeps oil out of the turbo and intercooler.Call nowRequest a quote
- Differential coolingA Banks Ram-Air rear cover keeps gear oil cooler when towing in the heat.Call nowRequest a quote
MAINTENANCE SCHEDULE
2007½–2012 6.7 Cummins service intervals.
These are Ram’s factory intervals from the owner’s manual schedule. The factory “severe” column covers towing, dusty roads, short trips and long idling, which describes most working trucks in Southern Arizona. Our recommendation follows the severe schedule, with oil every 5,000 miles and fuel filters every 10,000.
| Service | Factory, normal use | Factory, severe use | Our recommendation |
|---|---|---|---|
| Engine oil & filter | 7,500 mi / 6 months (maximum) | Sooner, per the oil change indicator | Every 5,000 mi |
| Fuel filters | 15,000 mi / 12 months | Same | Every 10,000 mi |
| Engine air filter | 30,000 mi / 24 months | Inspect at every oil change | Inspect at every oil change |
| Crankcase vent (CCV) filter | 67,500 mi / 54 months | Same | 67,500 mi / 54 months |
| Coolant flush | 97,500 mi / 60 months | Same | 97,500 mi / 60 months |
| Serpentine belt | 100,000 mi | Inspect at oil changes | Inspect at oil changes |
| 68RFE fluid & filters | 120,000 mi | 60,000 mi | 60,000 mi |
| Manual transmission fluid (G56) | 120,000 mi | 60,000 mi | 60,000 mi |
| Transfer case fluid | 60,000 mi / 48 months | 30,000 mi / 24 months | 30,000 mi / 24 months |
| Front & rear axle fluid | Not set by the factory | 15,000 mi / 12 months | 15,000 mi / 12 months |
| Valve lash check & adjust | 150,000 mi | Same | 150,000 mi |
Always go by your owner’s manual for your exact truck. Factory figures are maximums, and the dash service reminder comes first when it shows sooner.
WANT MORE POWER?
2007½–2012 6.7 Cummins performance upgrades.
Staged builds, lift pumps, transmission, exhaust and suspension upgrades for the 2007½–2012 6.7 Cummins.
BUYING A 2007½–2012 6.7 CUMMINS?
Get it inspected before you buy.
Our Diesel Pre-Purchase Inspection checks the engine, fuel system, transmission and front end, and looks for signs of past problems. We meet you at the seller.
How mobile service worksTell us your truck and where it is, we diagnose on site, you approve a written estimate, and we fix it where it sits.
See how it works →PLAIN-ENGLISH GLOSSARY
2007½–2012 6.7 Cummins terms, explained.
- Common rail
- A fuel system where a pump keeps fuel at very high pressure in a shared rail that feeds electronic injectors.
- VGT
- Variable geometry turbo. Moving vanes change how the turbo spools and also make the built-in exhaust brake work.
- DPF
- Diesel particulate filter. Traps soot and burns it off during a regen.
- Regen
- When the truck heats the DPF to burn off trapped soot.
- EGR
- Exhaust gas recirculation. Sends cooled exhaust back into the intake to lower emissions.
- Grid heater
- An intake air heater for cold starts. Its mounting bolt is a known 6.7 failure point.
- CCV
- Crankcase ventilation filter. Catches oil mist from the crankcase.
- 68RFE
- Ram’s six-speed automatic behind most 6.7 Cummins pickups.
- CARB EO
- A California Air Resources Board Executive Order number. It means a part is legal for street use in all 50 states.
Name-brand partsWe install proven brands like Banks, FASS, XDP, aFe, Randy’s Transmissions, Jasper, BD Diesel, Edge and Pacbrake.
See all the brands we install →OWNER QUESTIONS
2007½–2012 6.7 Cummins questions, answered.
Is the 2007½–2012 6.7 Cummins reliable?
Yes. The engine itself is very strong. Most problems come from the emissions system, the turbo’s moving vanes, the grid heater bolt, the 68RFE and the front end. Handle those and these trucks run a long time.
What is the grid heater bolt problem?
The intake grid heater is held in by a small bolt and nut. If it loosens and drops into the engine it can cause major damage. We replace the setup with the Banks Monster-Ram, which removes that bolt.
Do you delete emissions equipment?
No. We repair and upgrade with emissions-legal parts only.
Why don’t you list prices for these repairs?
Every truck is different by now. Mileage, past repairs and how it’s used all change the parts and labor. Call us at 520-990-1033 and we’ll quote your truck.
What warranty do repairs have?
Repair labor is backed for 1 year or 12,000 miles, and new parts carry their manufacturer’s warranty. Warranty details →
LET’S TALK ABOUT YOUR TRUCK
Call, text or request a quote.
Tell us your year, mileage and what you want done. We’ll recommend the right repair, quote it and come to you.