Honesty Automotive
“Their skills and technology helped them diagnose the exact issue and put it to bed, WITHOUT a long drawn out process of replacing things and racking up a bill.”
Best Engine Repair & Rebuild in Missoula, MT
24 technicians listed · 21 in Missoula · 3 open weekends · 21 rated 4.5+ · 1 shows a license
Data verified October 16, 2026
Rocky Mountain Diesel Corporation
“Sometimes, it's like going to a doctor it's hard to tell what the heck is going on with your insides, but like a good doctor, they will work with you until it's figured out.”
Greg's Trans-Electric
“A couple weeks after the Initial hiccup On a day the truck really started acting up I swung passed the shop and they diagnosed the problem with a scanner and had it repaired first thing the next morning.”
Transolution Auto Care Center
“Not from Montana and needed an emissions test to renew my plates and since they didn't do it, Jared gave me some very helpful advice and was super nice.”
Peak Auto Repair
“No one had the time to work on my truck or quoted me 3 to $4000 I talked to Greg at peak auto and he told me to bring it in and he'd see what they could do.”
EQ Auto & Diesel
“I blew a piston in my Cummins diesel engine the mechanic worked all weekend to replace six Pistons a major job they are very professional and they know what they're doing.”
Listed for drivers in and around Missoula, MT, 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: Missoula, MT
21 of the 24 technicians we list are based in Missoula; the other 3 serve Missoula from Lolo (10 mi) and Alberton (23 mi). The technicians on this page are rated from 4.2 to 5.0 across 1,547 reviews; 10 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these technicians on specific qualities, they most often praise professionalism (87%), quality (87%) and value (80%). 3 are open on Saturdays and 1 on Sundays. The services the technicians on this page list most often on their websites are air conditioning (3), belts & hoses (3), cooling systems (3), diagnostics (3) and batteries (2). 1 shows a license on its website; 2 list staff certifications (ASE) and 3 have a BBB rating of A or A+. Domain records put 4 websites of the technicians on this page at ten or more years old; the oldest dates from 2002. 2 offer financing; 2 give free estimates; 4 are family- or locally-owned and 5 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.
Why do some listings show another city?
21 of the 24 shops are in Missoula itself and the rest come from other towns within 25 mi. An engine job means leaving the car for days, so the drive happens once at each end rather than every morning.
Willy's Auto
“When I called to make an appointment for my vehicle to be serviced, I mentioned to the gentleman that I spoke with, JD, that I knew which part I needed and was going to order it.”
Master Technician
“He checked through it and told me what needed to be done ASAP and what didn't need to be done for 20k more miles and helped me put them in order of importance.”
Outlaw Diesel & Auto
“The owner of this establisment, who never receives payments for services via overseas figured out a way to receive payment through text, scan, and emails of information in the context of credit card!”
3 d's
“They talked with me about my situation, and gave me a lot of confidence moving forward.”
Crawfords Auto & Motorsports
“Chase is awesome that's why if I ever have issues he's the only one I trust to touch our vehicles that says allot these days he's reliable trust worthy and honest he does all our vehicles for the company as well also definite repeat customer for life...”
Real Steel Diesel Truck & Trailer
“Called Reel Steel Diesel, and they told us to bring in our RAM 5500 they diagnosed it called all around and even came in on Memorial Day to try and get us on the road!”
Brian's Auto & Custom Muffler
“Also, when something has happened to one of my cars out of town, he has made sure that I don't get ripped off and let's me know the amount I should be charged.”
Tece Trucking Inc
“These are extraordinary people at Te Ce Trucking so to everyone out there use any and all of their services and I guarantee you will not be disappointed.”
Hertz Engines
“Hertz was actually open on Sunday, fixed my car extremely quickly on very short notice, and he did so at a great price—all the while being courteous and patient since I was a bit late due to how slow I had to drive across town.”
Branch Built
“Branch MADE time for us and immediately scheduled his mechanical repair truck along with experienced, friendly and professional crew member Charlie to come assess and get me back on the road.”
Two Dog Garage
“I stopped by for a quote on a brake job with little to no notice, they Dropped everything they were doing to give me a quote and were able to fit me in the next day.”
Brians Diesel and Welding
“Really good service there working with me on getting my truck fixed definitely will go back”
Montana Truck Parts
“Super nice guy & about as fair & square as it gets!”
BKG Enterprise
“Best mechanic for Subaru's”
Quick Service Specialists
“Joe knows an incredible amount about all types of vehicles, explains what he has found to repair your vehicle and gives an estimated cost before performing work.”
Lolo Diesel
“Happy with the work he did on my vehicle.”
Cherry Lane Motors
“Great value, excellent pricing, unbeatable talent, Beautiful work all around!”
Buffalo Towing & Repair
“I already liked Doug; and my ol' lady mentioned while he was pulling our rolled over F-250 out of dear creek road, he gave her a friendly hug and took the time to wipe a teardrop off her cheek.”
Why these companies made our list
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