Popular Cities
0 of these 24 technicians are in Ontario; the rest are in Rancho Cucamonga, Brea and Fontana.
None of the 24 technicians listed here are in Ontario itself; they are in towns including Rancho Cucamonga (8), Brea (4), Fontana (4). 25 technicians in Ontario are on file in total; the list shows the highest-rated.
Ratings range from 4.1 to 5.0 across 2,922 reviews; 14 technicians have 50 or more reviews; 18 are rated 4.5 or higher.
2 give free estimates.
Services most often listed on their websites: auto repair learn more (2), brake service learn more (2), check engine light learn more (2), tires learn more (2), clearbra (2), ceramic coating (2) and vinyl wrap (2).
In structured review feedback, customers of these technicians most often flagged professionalism (93%), quality (79%) and value (79%).
20 of the 24 technicians have a website on file; 10 publish a contact page; 6 list a public email; 2 take online bookings.
10 of these technicians have had their website domain for ten or more years; the oldest was registered in 2000.
Figures are counted over the technicians on this page from public listings and company websites collected in 2026; distances are straight-line; hours and prices change, so confirm before you visit.
The 24 shops on this page repair, rebuild and replace engines in and around Ontario, CA. 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.
A deep knock under load is bearing damage, and every mile grinds more metal through the oil. Tow it. A light tick that fades once oil pressure comes up is less urgent, though it still wants a listen this week rather than next month.
The teardown and inspection as a separate line, the parts list, the machine work, all the gaskets and seals, fluids, and anything the shop expects to find. Ask what happens to the price if the block turns out to be scrap, and get that answer before the engine comes apart.
Usually a thermostat, a water pump, a fan that stopped turning, or coolant that leaked out. The repair is cheap; the damage from driving on is not. A head that warped or a gasket that let go turns a small job into a big one, so stop the car when the gauge climbs.
Excerpts from public reviews of the technicians listed on this page.
