Mac-Weld, Inc. rebuilds all types of automotive engines, medium duty diesel engines, gas and diesel tractor engines, and most inboard marine engines in our Carbondale, IL professional machine shop. In business since 1987, our mission is to provide quality service at an affordable price.

  • Quality work, dependable service, quick turnaround
  • Affordable prices
  • ASE Certified, experienced machinists - 150 years combined experience
  • State-of-the-art equipment with up-to-date technology and environmentally safe cleaning equipment
  • 24 month, 24,000 mile warranty on all rebuilt engines and rebuilt cylinder heads
  • 200 rebuilt cylinder heads in stock; we can order almost any head; order today; in stock tomorrow
Mac-Weld, Inc. - cylinder head rebuilding and valve guide replacement in Carbondale, IL

Communities Served

Mac-Weld has been serving southern Illinois, southeast Missouri and southwest Indiana since 1987. In Illinois from Red-Bud to Cario; in Missouri: Cape Giradau, Sikston, Festus, East Prarie,and Charleston; in Kentucky: Paducah, Benton, and Kevil; in Indiana: Evansville, Mt. Vernon, and Habstat.

© Copyright 2020 Mac-Weld, Inc. All rights reserved.

Mac-Weld, Inc.
Machine & Welding Works

612 San Diego Road, Carbondale, IL
Mon-Fri 8am-5pm,
Closed Sat and Sun



  • Aluminum and cast iron head and block crack repair, cylinder head rebuilding
  • Flywheel grinding, crankshaft regrinding, engine block reboring & decking
  • King pin fitting, rod reconditioning for gas & diesel
  • State of the art thermal cleaning for blocks and cylinder heads
  • Magnafluxing, general press work, welding of almost all metals, aluminum, cast iron and stainless steel


  • All parts for both stock and performance engines:
  • Complete engine rebuild kits
  • Rebuilt cylinder heads, crankshaft kits, valves, springs, guides, seats, rings
  • Rod main and cam bearings, camshafts, lifters, push rods
  • Head sets or complete engine gasket kits
  • Welding gasses, argon mix gases, helium, acetylene, nitrogen, carbon dioxide


Fel Pro, Melling, Clevite, Federal Mogal, SBI, PBM, Edlebrock, ARP, Brodix, Speed Pro, Lincoln Welders & Parts

APSA of IL - automotive aftermarket business websites for Members
An APSA of IL Member website.

Mac-Weld has an A+ rating with the BBB Mac-Weld is a BBB Accredited business in Carbondale, IL

AERA Engine Builders Association
Better Business Bureau Accredited A+ Rating