Bottom Line
High Performance Diesels

Do you remember the old aluminum oil pans on the small cam engines that would leak engine oil due to cracks around the rear corners? Weekly, we would weld and reinforce these pans to stop the leaking. Then, in 1981, the stamped steel oil pan was released and we thought our oil leaking problems were over.

Because of the amount of engine noise emitted from the oil pan, Cummins developed an insulation blanket to cover the pan, however, the insulation would retain moisture and sometimes develop rust that would eventually eat through the oil pan. A quick and inexpensive repair is to thoroughly sand or grind the rust and paint from the oil pan in a 6-inch diameter. Thoroughly clean the bare metal with brake cleaner or lacquer thinner to remove any dust or oil. Next, purchase a Swiss fiberglass repair kit from your local auto parts store. Using the angel hair matting — not the fiberglass cloth — mix the resin and hardener according to the directions on the can. You must do this in a heated garage. Fiberglass needs heat to cure. Using a flux brush, apply a coating of resin to the oil pan then a piece of angel hair matting about 1 inch larger than the rust hole, then more resin, tapping it into the angel hair using the flux brush. Then apply another piece of angel hair matting 1 inch larger than the first piece, along with more resin. Continue this process until you have applied about five layers of angel hair matting. Make sure there are no air pockets between the layers. Allow to harden for several hours before installing the oil pan to the engine. That is a $20 oil pan hole repair. If the metal is properly prepared, the fiberglass patch will never come off.

The N-14 rear sump stamped steel oil pan will sometimes crack around the rear corner bolts. To eliminate this problem Cummins manufactures a clamping plate (part number 4626248). This plate mounts to the rear six bolts below the oil pan. This clamping plate requires four part number 4026354 and two part number 4026355 bolts. If your engine is equipped with the insulation cover, you will need two part number 4058673 bolts.

Engines produced since Dec. 7, 1999, beginning with serial number 11988415, without the noise insulation cover, already have this clamping plate installed. If your engine has the insulation cover and has been produced since March 20, 2000, and beginning with serial number 12002401, it also is equipped with the clamping plate.

This is an inexpensive way to avoid a cracked oil pan, which would become a costly repair. Do not over-tighten the oil pan bolts. The four 5/16 inch bolts located at the rear of the pan are torqued to 20 ft.-lbs. and the 32 7/16 inch bolts are torqued to 50 ft.-lbs.

Drag racing event
Are you ready for a three-day truck and diesel drag racing event? The Quaker City Drag-way in Salem, OH, will host the event Aug. 9-11, 2002. Bring your truck and your family and plan to spend all three days at the drag-way.

Friday night will be test and tune, Saturday night will be a diesel gamblers race, and Sunday will be an all diesel drags. For more information call Matt at (330) 332-5335.

Peterbilt book
If you’re into Peterbilts you should take a look at Warren Johnson’s new 256-page book called “Peterbilt: The Evolution of Class.” L.H. Bill, the founder and first president of Fageol Motors Co., laid the foundation for an enduring company when he wrote, “We will never build to a standard lower than the highest. When we can buy better parts than we can make, we will buy them. When we can make better parts than we can buy, we will make them.” Bill established the evolution of class when he vowed, “We will produce the best equipment or we will produce nothing.” The company he created in 1915 became in 1939 what is now known as Peterbilt Motors Co.

Theodore Alfred “Al” Peterman was a man known for his mechanical genius, purchased Fageol Motors in 1939 for a total of $50,000. The first truck to be called a Peterbilt was a chassis for Hirst Fire Truck Co. This first completed truck was an “L” model 334 and was sold to Gannet Beckley of Stockton, CA. The second completed truck was an “M” model 260 and was sold to Pete Bordenave, also of Stockton. If you love your “Pete,” you’ll enjoy reading this book.

My booklet is now available for viewing or download on the Internet. The address is If you would like our booklet on high performance Cummins diesels give Aimee a call at (724) 274-4080. There is a $9 charge for shipping and handling. Just call us with your Master Card, Visa, AMX or Discover card number and we will get one out to you. Or send us a check or money order.

The above column is the opinion of the writer and does not necessarily reflect the opinions or beliefs of Land Line Magazine.