Stan's Auto Service Inc.
“Nice people, nice waiting area, a good experience all the way around.”
Best Engine Repair & Rebuild in Loveland, CO
24 technicians listed · 13 in Loveland · 1 open 24/7 · 1 open weekends · 22 rated 4.5+
Data verified October 16, 2026
Proformance Diesel & Auto Repair & Diesel Emission's
“They get me in and out of the garage quickly, and they always get the problem fixed the first time.”
Expert 4WD & Auto
“The best shop in town, always taken care of all my problems efficiently and for a fair price!”
Alliance Auto Care
“Derek had great communication throughout the process and all repairs were done in the timeframe promised.”
Advantage Automotive
“They will be getting all my future business and I will recommend this shop to everyone.”
Colorado Toyota Repair / L1 Automotive
“Anything I get done on my vehicles is explained and even shown to me..”
Listed for drivers in and around Loveland, CO, these 24 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: Loveland, CO
13 of the 24 technicians we list are based in Loveland; the other 11 serve Loveland from towns including Boulder (29 mi), Johnstown (6 mi) and Fort Collins (9 mi). The technicians on this page are rated from 3.9 to 5.0 across 3,522 reviews; 16 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these technicians on specific qualities, they most often praise professionalism (95%), quality (80%) and value (63%). The topics that come up most in reviews of the technicians on this page are "diagnosis", "honest" and "fair". 1 is open around the clock and 1 is open on weekends. 1 shows a license on its website; 3 list staff certifications (ASE) and 11 have a BBB rating of A or A+. 20 have ten or more years of experience, the longest 67 years. 1 offers emergency or roadside call-outs; 4 offer financing; 1 gives free estimates; 6 are family- or locally-owned and 6 list coupons or special offers. 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.
Do engine shops listed for Loveland let me spread the cost?
4 of the 24 shops on this page state that they offer financing. An engine is the repair people borrow for, so compare what the credit costs against what a different car would cost you, and get the repair quote in writing first.
Engle Automotive
“Performed diagnostics and fixed main issue for going in and identified some issues that had not become apparent yet.”
Big Thompson Diesel and Automotive
“They are knowledgeable in all that is trucks/cars and stand behind their work.”
Lucky's Diesel Shop
“The only place I'll bring my 2014 F-250 to get worked on!”
Metric Motors
“They are always up front and honest with what needs to be done an how soon on a vehicle.”
Subadude's Subaru Repair
“He told us his recommendations for a fix and replaced the entire engine for a reasonable price and it has had no problems.”
Gearz Automotive
“Kevin and his techs have decades of experience on current model domestics, foreign and old school muscle cars.”
Rowley's Auto Mechanical
“It is so nice to work with a local small business that believes in integrity and treating people right.”
Mason Repair and Roadside Service
“These guys came over to cracker barrel & helped us fix our motorhome.”
Fort Collins Complete Auto Repair
“Adam was able to get us rolling within 24 hours, was communicative, and reasonably priced.”
Truck Lab Colorado
“I've been taking Tristan various trucks for repairs or just simply checking up on them, and he's done hood by me every damn time.”
Atlas Performance Machine
“Great work on my 1965 f100 stepside truck engine I highly recommend them for there professional workmanship”
Greeley Automotive Machine Inc
“Can't say enough about how spectacular their quality is and their customer service!”
J & S Automotive
“Most reliable auto repair shop I've been to.”
Coyote Motors
“Andrew helped me out in a tight spot and probably saved my life.”
Colorado Transmission & Diesel Specialists
“Doug has rebuilt all my transmission from my race transmission to my daily driver always quality work and stands behind his product.”
Jp's Garage LLC
“They did warranty work without batting and I have never seen any garage or automotive repair do this.”
Twin Peaks Diesel
“These guys are our go-to team of professionals when it comes to our commercial vehicles.”
Glenwood Automotive
“They looked at the issue with my car, called back within about an hour, explained what was going on, why it wasn't a problem for my return trip, and what I should probably do long-term after I get home.”
Why these companies made our list
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