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 […]

Cummins Diesel Fan Belt Replacement

1. Remove the belt by inserting the drive nose of a 3/8″ ratchet into the square hole in the idler pulley. Use the ratchet to unload the idler tension from the belt by rotating the ratchet counterclockwise as viewed from the front of the engine. The best position for the ratchet is almost straight up […]

Waste Gate Mods

The simple explanation: a waste gate limits the maximum boost generated by the turbocharger. How it works and what it does: The waste gate uses a pressure activated diaphragm and rod to operate an exhaust bypass around the turbocharger and thus limit the maximum boost that the turbocharger can produce. This permits an engine manufacturer […]

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 […]

Cummins Governor Spring Replacement Aid

Here’s the dust cover that needs to be removed to access the governor springs Once the dust cover is removed you’ll need to turn the motor over till a set of springs is lined up perfectly in the opening … there are 2 sets of springs they are mounted opposite of each other Here’s how […]

Dodge Cummins 24V Fuel Delivery

As you may know the 2nd Gen Vp44 Equip CTD has its share of fuel delivery problems. Here is a rough break down of actually what happening on a stock truck. The factory LP is working its self to death pulling the fuel all the way from the tank and it will stumble. When it […]

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 […]

Stewart Warner B757 Ultra Shift Light Install Sheet

Click the link below for the pdf version of Stewart Warner B757 Ultra Shift Light Install Sheet Stewart Warner B757 Ultra Shift Light Install Sheet [thanks to Stewart Warner used with permission]

Turbo Troubleshooting Chart

Click on Image for a Larger View [thanks to Garrett used with permission]

24V Transmission Pan Comparisons

By adding an increased capacity transmission pan you decrease your fluid temperature and prolong the life of your transmission. Here are some options: Hughes (www.hughesperformance.com) Bolt on deep transmission pans are made from cast aluminum and designed with cooling fins to dissipate heat quicker. Cast aluminum pans hold approximately 2 to 4 extra quarts of […]

Silencer Ring

A silencer ring is a metal baffle placed into the turbocharger inlet to reduce whistle from the turbocharger. It is installed in Ram truck engines at the request of Chrysler. The silencer ring has no effect on engine output, EGT, or boost levels. Removal: Remove the flex hose from the front of the turbo that […]

Port and Polishing

First, you will need cutters. In the next photo you will see some of the cutters I use for this. On the right are metal cutters. These cost $20 to $75 each, so choose wisely. In the middle are sanding cones. I use #80-100-220-240 grit. I use a long mandrel and a (not shown) short […]

Repair Under Hood Weatherstripping

Tired of always finding the weather strip laying on top of the turbocharger in the engine compartment? A bead of silicone rubber RTV in the weatherstrip groove will keep the strip attached and eliminate the fire danger. Red RTV or high strength gray RTV is my favorite for this type of work. Black RTV would […]

Stewart Warner B749 Gauge Install Sheet

Click the link below for the pdf version of Stewart Warner B749 Gauge Install Sheet Stewart Warner B749 Gauge Install Sheet [thanks to Stewart Warner used with permission]

Stewart Warner B759 LED Light Kit Install Sheet

Click the link below for the pdf version of Stewart Warner B759 LED Light Kit Install Sheet Stewart Warner B759 LED Light Kit Install Sheet [thanks to Stewart Warner used with permission]

Clutch Replacement

TOOLS: Tranny jack 2 or 3 ratchet straps porta power (this will make removing the cross member MUCH eaiser) A bottle jack and a piece of 4×4 will work in a pinch. Drill a hole in the end of the 4×4 to allow the bottle jack shaft to go in the 4×4 a couple of […]