Dillon's Automotive
“Tommy, Rick the manager, and Sunny have always been there for me and are so thorough with their work.”
Best Coolant & Radiator Flush in Katy, TX
15 mechanics listed · 9 in Katy · 8 open weekends · 14 rated 4.5+
Data verified October 16, 2026
Smith's Auto
“No trying to up sale or requiring an expensive diagnostic before addressing the issue.”
Auto Check Elite
“I have taken my two vehicle's for everything from electrical work, oil change, tire rotation, alignment and a new battery”
Cinco Tire & Automotive
“I also appreciate how friendly the guys are when I have a question.”
Southwest Car Care Center
“They noticed that the oil was significantly low so they topped it off with some really good stuff while they were working on a completely unrelated problem...”
Proline Auto
“Kept me posted thru out the time they had my car and went over everything in detail.”
Listed for drivers in and around Katy, TX, these 15 shops list coolant flushes and antifreeze service. What each one says about the coolant types it stocks, machine flushes and warranties comes from its own website; ratings and quotes come from public reviews.
Area overview: Katy, TX
9 of the 15 mechanics we list are based in Katy; the other 6 serve Katy from Houston (27 mi). The mechanics on this page are rated from 4.4 to 5.0 across 7,355 reviews; all 15 have 50 or more reviews and 14 are rated 4.5 or higher. The topics that come up most in reviews of the mechanics on this page are "price", "honest" and "diagnosis". 8 are open on Saturdays. The services the mechanics on this page list most often on their websites are wheel alignments (3), AC repair (2), auto inspections (2), auto repair (2) and brake repair (2). 5 list staff certifications (ASE) and 3 have a BBB rating of A or A+. 7 have ten or more years of experience, the longest 24 years. 3 offer financing; 1 gives free estimates; 5 are family- or locally-owned and 7 list coupons or special offers. We have a website on file for 14 of the mechanics on this page; 13 publish a contact page; 5 list a public email and 4 take bookings online. We count these figures across the mechanics on this page; distances are straight-line, and hours and prices change, so confirm the details with the mechanic before you visit.
Why does this page include shops elsewhere?
9 of the 15 shops sit in Katy and the rest come from other towns within 30 mi. This is planned maintenance rather than an emergency, so booking a little further out costs you nothing but the drive.
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Cinco Car Care
“I have had a couple of issues with my car (2019 Infiniti) and CCC has been absolutely phenomenal.”
Clutch Automotive
“Their attention to details in regard to their customer services blew me away.”
Lonestar Auto Repair Katy
“I brought my car in with an original issue that showed problems in my spark plugs but he was able to find that it was actually somewhere else.”
Cliff's Auto Repair
“They did the work efficiently and kept me posted on the status…Highly recommend!”
West Houston Auto Repair
“They were very professional and didn't try to sell me on a bunch of things I didn't need.”
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Katy Brakes & Alignment
“They fixed my car so quickly and it's been running flawlessly since!”
Advance Automotive
“He explains everything clearly, offers fair pricing, and genuinely looks out for the safety of me and my family, ( he's also worked on my sister's vehicle and did an excellent job).”
18 Wheelers Lube ONE
“Cleanest shop I've ever seen in my life, fastest pm I've ever seen.”
Honest-1 Auto Care
“They are organized, easy to reach and every time the job is done quickly and done right.”
Why these companies made our list
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