Dupage Auto & Truck Repair
“They correctly diagnosed and repaired my Jeep and by their honesty, saved me a good sum.”
Best Engine Repair & Rebuild near St. Charles, IL
3 of these technicians are based in St. Charles; the others serve St. Charles from towns including Carol Stream (9 mi), Aurora (11 mi) and Schaumburg (14 mi).
6 open weekends · 14 rated 4.5+
Data verified October 16, 2026
Excel Automotive Repair
“They probably lost money on a difficult repair but stuck to their low diagnosis quote.”
EP3 Motorsports
“EP3 is a great shop Zac was able to help me out with an issue my F82 was having.”
Komet Motorsports
“It's like they're working in their own vehicles with the amount of care and pride they put into all of their work.”
Grizzli Diesel Performance
“Can't say enough good things about John at Grizzli Performance, I brought my 2020 Ram 2500 to him with a blown transmission that he rebuilt but then we found it had a ton of other problems.”
Total Diesel
“The main mechanic ron was very knowledgeable and fixed a lingering problem with my lift gate..”
Listed for drivers in and around St. Charles, IL, 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. Charles, IL
The 15 technicians on this page are rated from 4.4 to 5.0 across 3,007 reviews; 13 have 50 or more reviews and 14 are rated 4.5 or higher. The topics that come up most in reviews of the technicians on this page are "price", "diagnosis" and "communication". 6 are open on Saturdays and 2 on Sundays. 1 lists staff certifications (ASE) and 6 have a BBB rating of A or A+. 11 have ten or more years of experience, the longest 110 years. 3 offer financing; 1 is family- or locally-owned and 5 list coupons or special offers. We have a website on file for 14 of the technicians on this page; 12 publish a contact page; 7 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?
3 of the 15 shops are in St. Charles itself and the rest come from other towns within 15 mi. An engine job means leaving the car for days, so the drive happens once at each end rather than every morning.
McLean Auto Repair
“Great service and great prices well, seasoned auto technicians in all types of vehicles”
Car Doctor Jr
“I will never go anywhere else and they are so friendly I'm happy I found this place”
Stan's Service Station
“Fez and Dave genuinely care about you and your vehicle.”
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Mobile Mechanic Pros Aurora
“First it was not clear to me why my Chevrolet started to act weird, but after the gentleman from Mobile Mechanic Pros diagnosed my car, it turned out I need fuel pump replacement.”
Marty's Automotive
“The owner took his time to fix every detail and showed us and explained what was wrong.”
Robinson's Auto Repair Inc
“They are very friendly and do excellent work.”
Six Star Motorsports
“The sales manager Chris was very knowledgeable on my Subaru Legacy year and was able to guess what the problem was before his mechanic even put it up on the lift.”
Renberg Auto
“As usual they were very friendly and eager to answer my questions about my ever aging Volvo.”
Express Auto Repair & Emissions Repair
“Best shop around hands down has very knowledgeable people working there took in my car for a diagnostic to figure why my car was overheating not only did they find the issues other shops hadnt found but they fixed it fast and at a very reasonable price.”
Why these companies made our list
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