Machine Shop Services

Precision Automotive Diesel operates a large, well equipped and expertly staffed machine shop.

Proper cylinder head finish to insure head gasket sealing photo

The size of our staff allows us to offer prompt turnaround on all jobs, big or small. Our experience and equipment can handle cylinder blocks, crankshafts, cylinder heads and connecting rods up to D9 cat and 1710 cummins sized engines.

Free pickup and delivery service is offered to customers within a 60 mile radius of Rockford.

Accurate valve grinding for perfect valve seating.

valve grinding photo

Machining upper bore of ISX block for repair sleeves.

bore repair photo

Precision valve seat cutting. Essential for quality valve job.

valve seat cutting photo



  • Magnuflux inspection
  • Hardness testing
  • Straightening
  • Grinding
  • Polishing

Connecting Rod

  • Crack and straightness check
  • Reconditioning
  • Bushings replaced and pins fit
  • Pistons installed on rods

Cylinder Heads

  • Cleaning
  • Bake and blast
  • Crack check
  • Complete inspection
  • Vacuum testing
  • Pressure testing
  • Guides replaced
  • Seats replaced
  • Valve grinding
  • Serdi Seat cutting
  • Complete cylinder head rebuild
  • Resurface decks
  • Resurface manifold side of head
  • Injector cups replaced

Cylinder Block

  • Cleaning
  • Bake and blast
  • Crack inspection
  • Bores, cylinder and main housing mic’d
  • Boring cylinders
  • Honing cylinders
  • Line boring
  • Line honing
  • Cam bearing service
  • Resurfacing decks and other surfaces
  • Final clean for assembly
  • Expansion plugs replaced
  • Counter bores cut
  • Upper bore repairs
  • Lower bore repairs

Providing Quality Engine Component Rebuilding, Engine Parts and Automotive Machine Shop Services since 1955.