Precision Automotive Diesel offers repair on diesel engines, diesel parts across the nation.

Precision Automotive Diesel

Precision Automotive Diesel in Rockford

Welcome to Precision Automotive Diesel,
Northern Illinois' Engine Specialist.



Established in 1955, Precision has built a reputation for delivering quality engines, engine parts and rebuilding services to customers who depend on their engines for their living.

Our specialties include genuine Cummins parts, surplus Cummins parts, Onan parts, surplus Onan parts, Onan short blocks, Perkins parts, Perkins remanufactured engines, Hatz parts, Ford Industrial parts, Isuzu parts, Kubota parts, Kohler Engine parts, Continental parts, and Wisconsin parts.


We also offer aftermarket engine parts for all major engines including Caterpillar, Detroit Diesel, John Deere, Case International, and Deutz, including Deutz remanufactured engines. We are currently featuring specials on 3406e Engine kits and Series 60 engine kits.

Our staff of experienced diesel technicians, machinists and parts specialists stand ready to expertly serve you when your needs call for engine servicing and parts.

Here at Precision Diesel, our service offerings include: Power Point Presentation About Us

  • crankshaft grinding
  • three angle valve jobs
  • cylinder boring and honing
  • cylinder head
  • manifold
  • flywheel
  • block resurfacing

We also offer complete engine overhauls including dyno testing.

For engine rebuilding, engine parts and automotive machine shop services, look no further than Rockford, Il. and Precision Automotive Diesel.

Precision Automotive Diesel
5330 American Road
Rockford, IL 61109
Toll Free: 800-221-0700
Phone: 815-874-7979
Fax: 815-874-7494
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