Post Your Successful Diesel Mods At Dieseldatabase

Have you completed a successful mod on your diesel truck? and did you take pictures and discovered tips that might help others? Your post is welcome here. All you have to do is register on this site. Then contact us via the the contact form on the ABOUT page (see menu), letting us know you […]

Cleaning Stickum Left From Vinyl

Just after the winter began winding down and the weather was beginning to warm up, I removed a large 30″ x 18″ vinyl sticker from the tailgate of my truck. No matter how much heat was applied, the back of the sticker refused to come loose. I tried everything, Goof-Off®, fingernail polish remover, paint thinner, […]

Cleaning Stickum – Part 2

This is a followup article to Cleaning Stickum Left From Vinyl After the last article regarding removing the stickum leftover from vinyl lettering and signs, several people got hold of me to let me know of their remedies. DM left a comment on the article site about peanut butter removing residue left behind by decals. […]

P Pump Cutaway

I snapped these Photos at SDX Aneroid Fuel Plate Governor Arm Governor Spring Cover and Throttle Cable Connection Point Governor Springs Pump Cam Delivery Valves Together

APPS Repair

This guide addresses the construction, possible disassembly, and possible repair of erratic or failed APPS units. These throttle control units, APPS (Accellerator Pedal Position Sensor), most frequently seem to fail or become erratic in operation due to deteriorating contact between internal rotating fingers and the resistance track they ride on inside the APPS unit, causing […]

12V Cummins Fuel System Diagram

Here is a diagram for the 12V Dodge Cummins Fuel System. [Click on image for larger version]

Automotive Formulas

How To Calculate CFM: Engine size (CID) x maximum RPM / 3456 = CFM CFM @ 100% volumetric efficiency Cylinder volume (displacement): 3.1416 x bore x bore x stroke Compression ratio: Vi ñ V2(Where Vi is total volume of one cylinder and V2 is volume of space above piston at top of stroke) Brake Horsepower […]

Velvet Ride Shackles

Velvet Ride Shackles, made by BF Goodrich Aerospace, are designed to replace the rear spring shackle, and create a more comfortable, less buck-board feel ride by absorbing some of the harsh bouncing of the stiff heavy duty springs. They basically use a rubber torsion device inside of the shackle.  I bought mine from 4 Wheel […]

Gear Ratio Spreadsheet

Click the link below for the excel version of Gear Ratio Spreadsheet Gear Ratio Spreadsheet

Dodge Cummins HTT Manifold

After much reading of folks having troubles with the OEM manifold cracking and the bolts coming loose from expansion and contraction I decided it was time for me to go to a 3 piece manifold, I opted for the unit from High Tech Turbo and purchased one from my friend Lazer Bob in Colorado, The […]

12V Cummins Thermostat Replacement

Symptom/Condition: The vehicle may not warm completely, especially in cold ambient temperatures. This condition may be due to a thermostat that is stuck in the partial open position by debris in the cooling system. NOTE: THE COOLING SYSTEM USED ON THE CUMMINS DIESEL ENGINE EQUIPPED VEHICLES PROVIDES THE CAPACITY AND PROTECTION OF THE HIGHER GVWR […]

Dodge Cummins Under Hood Mods

Click picture for a full size view. Click on the product titles below for a link to a dealer OuterWears FAQs (Questions About Prefilters) Why do I need a Pre-Filter? How does a Pre-Filter work? Will adding a Pre-filter reduce my airflow or horsepower? Will the Pre-Filters work on paper filters? How much dirt will […]

BHAF – Big Honking Air Filter

BHAF = Big Honking Air Filter This is a very easy mod and the benefits are great … Cooler Egts … Better flow … More Whistle !!! First remove the air intake line running from your factory Air box to your Turbo Then remove your air box … just pull straight up This area it […]

Cummins 12V Idle Adjustment Q&A

Subject: [RTML] Cummins idle speed How do I adjust the idle speed on my Ram diesel? The idle speed seems too high. First, trace the accelerator linkage to the connection on the fuel pump. With the ENGINE OFF have someone floor the accelerator and watch the fuel arm move. The best position I can describe […]

Another 24V Lift Pump Replacement Procedure

This is how I replaced the lift pump on my ’99 QC, 4×4. Not sure what variations may or may not accure on other models. Parts list…………..New lift pump, lift pump wire pig tail, banjo bolts washers (8), dielectric grease and approx 1/2 gallon of clean diesel. Tools ………. 3/8″ drive ratchet, 3 or 4 […]