Riverside Automotive Repair
“I've had RAR repair a condenser coil leak in my GMC AC before, and it worked great for 5 yrs and never had a problem with that repair.”
Best Engine Repair & Rebuild in St. George, UT
15 technicians listed · 14 in St. George · 1 open 24/7 · 4 open weekends · 12 rated 4.5+
Data verified October 16, 2026
Zion Motors
“Also got my family and myself a ride home from the shop, 10 out 10 recommend Zion motors!”
Colby's Diesel & Automotive Repair
“Colby was able to diagnose, install and perform all tests in one day”
Saint George Semi Truck Roadside Solutions LLC
“Recommended to anyone stuck on the side of the road like myself!”
Clay's Auto Repair & Service
“I will always go to Clays Auto for any and all of my vehicle needs from oil changes, repairs, brakes and even tires and alignment.”
Southwest Diesel Service Inc
“They got us in right a way and Rex diagnosed the problem and fixed it.”
Listed for drivers in and around St. George, UT, these 15 shops repair, rebuild and replace engines. What each one says about machine work, warranty terms and the engines it supplies comes from its own website; ratings and quotes come from public reviews.
Area overview: St. George, UT
14 of the 15 technicians we list are based in St. George; the other one serves St. George from Washington (4 mi). The technicians on this page are rated from 3.9 to 5.0 across 4,240 reviews; 14 have 50 or more reviews and 12 are rated 4.5 or higher. The topics that come up most in reviews of the technicians on this page are "price", "diagnosis" and "honest". 1 is open around the clock; 4 are open on Saturdays and 1 on Sundays. 3 list staff certifications (ASE) and 2 have a BBB rating of A or A+. 10 have ten or more years of experience, the longest 43 years. 1 offers emergency or roadside call-outs; 1 gives free estimates; 2 are family- or locally-owned and 3 list coupons or special offers. We have a website on file for all 15 of the technicians on this page; 13 publish a contact page; 3 list a public email and 2 take bookings online. We count these figures across the technicians on this page; distances are straight-line, and hours and prices change, so confirm the details with the technician before you visit.
Why do some listings show another city?
14 of the 15 shops are in St. George itself and the rest come from other towns within 5 mi. An engine job means leaving the car for days, so the drive happens once at each end rather than every morning.
Hummel's Automotive Diagnostic and Repair
“We had a lot of issues with our car and called several mechanics but Hummel's was the only one that could give us a solid timeline and helpful information about what might be going on with our car.”
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St George Auto Gallery Service
“Very friendly and they have been checking in to make sure my car doesn't have any more reoccurring problems.”
Kenton Repair
“I've known Kenton for years now and I keep going back to him for all our vehicle repairs.”
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Fox's Friendly Automotive
“Initially they were just the most ideal place to have a pre purchase inspection, but we were impressed with that so much that we have been coming back.”
A-Team Automotive
“These guys got us in right away and did everything they could to get us fixed up and back on the road.”
St George Transmission & Automotive
“They let me know exactly what was going on and I didn't have to guess.”
Guy's Auto Master
“We've always been pleased with the quality of his repairs and maintenance, with a variety of vehicles.”
Reynolds Motor Machine Inc
“Our company has been using reynolds for awhile and have been very satisfied with his work.”
Flex Auto Center
“It's hard to find an automotive repair shop that has such high integrity and knowledge!”
Why these companies made our list
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