Duffin Automotive Engine Repair Service – Machine Shop

San Antonio’s #1 Engine Repair, Engine Rebuild, Valve Jobs, Crankshaft Grinding, Diesel and Engine Balancing

We have been serving San Antonio and South Texas for the last 46 years, providing precision engine machine work and engine parts. Through excellent customer service and attention to detail our goal at Duffin Engine Service is to exceed your expectations. duffnengine_header

Duffin Engine Service is open Monday through Thursday 8:00 am to 5:00 pm. Friday 8:00 am to 3:00pm. Located at 1227 Hallmark,three blocks inside Loop 410, near Airport Blvd. [click for directions]. We offer engine machine shop services for Automotive, Over the road diesel trucks, Industrial, Marine, High Performance and small engines. Duffin Engine Service is committed to keeping current with the latest technologies, to accomplish this we are a member of the Automotive Engine Rebuilders Association(AERA).

SERVICES OFFERED
BLOCKS CONNECTING RODS CRANKSHAFTS	CYLINDER HEADS CLEANING MISCELLANEOUS

BLOCKS
MAGNAFLUXING CYLINDER BORING & HONING SURFACING & COUNTERBORES MACHINED	ALIGN BORING & ALIGN HONING UPPER & LOWER BORE SLEEVING MAIN BEARING BORES & MAIN CAP SLEEVING	CAM BEARING BORE SLEEVING & ALIGN BORING PRESSURE TESTING & CASTING REPAIRS.
CRANKSHAFTS
MAGNAFLUXING STRAIGHTENING	THRUST REPAIR	MICRO-POLISHING
CYLINDER HEADS
VALVE JOBS SURFACING	VALVE GUIDE REPLACEMENT & REPAIR VALVE SEATS INSTALLED,	PRESSURE TESTING & ALUMINUM HEAD WELDING (CASTING REPAIR)
CLEANING
VAT CLEANING CAST IRON & ALUMINUM RUST STRIPPING	GLASS BEAD & SHOT PEENING	ULTRA SONIC CLEANING
CONNECTING RODS
MAGNAFLUXING	BIG END RECONDITIONING	REBUSH & PIN FIT SMALL ENDS
MISCELLANEOUS
FLYWHEEL GRINDING ENGINE BALANCING	WELDING & BRAZING (STEEL & ALUMINUM) TRANSMISSION & FLYWHEEL BEARING BORE SLEEVING	BROKEN BOLT REMOVAL & THREAD REPAIR BROKEN TAP & EZ OUT REMOVAL (METAL DISINTEGRATING)