J and S Auto Care Specialists
“The mechanic was extremely knowledgable about the particular condition and recommended a conservative course of action that would save me money and avoid the need for an appointment.”
Best Coolant & Radiator Flush near Janesville, WI
1 of these mechanics is based in Janesville; the others serve Janesville from towns including South Beloit, IL (14 mi), Delavan (21 mi) and Machesney Park, IL (22 mi).
4 open weekends · 9 rated 4.5+
Data verified October 20, 2026
Integrity Auto Care
“Needed a battery as not at its optimal and they were able to get it same day so I was back in my car by end of day!”
Countryside Tire and Lube LLC
“Eddie got me right in and took care of the problem and he even made sure all 4 tires were at the correct pressure level.”
South Beloit Lube
“Appreciate Andrew and his guys…thank you again”
Carz R Us
“Appreciate how they disclose pricing and provide options for what gets addressed when before the service is performed.”
Advanced Auto Clinic Delavan
“Very nice place my service consultant Jeff was very kind and slow with me and helped me find a price that worked with me.”
Listed for drivers in and around Janesville, WI, these 10 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: Janesville, WI
The 10 mechanics on this page are rated from 4.2 to 5.0 across 2,807 reviews; 7 have 50 or more reviews and 9 are rated 4.5 or higher. 4 are open on Saturdays. 6 list staff certifications (ASE) and 1 has a BBB rating of A or A+. Domain records put 7 websites of the mechanics on this page at ten or more years old; the oldest dates from 2008. 3 offer financing; 2 give free estimates; 1 is family- or locally-owned and 6 list coupons or special offers. We have a website on file for 8 of the mechanics on this page; 7 publish a contact page; 5 list a public email and 2 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.
Can I book a coolant change online with shops listed for Janesville?
Online booking is offered by 2 of the 10 shops. Put your engine and the coolant specification in the notes when you book, since the shop needs the right fluid on the shelf before you arrive rather than a universal jug under the counter.
Korey's Auto Kare LLC
“The team was thorough, prompt, and attentive to the time sensitive request.”
East-Side Automotive
“Did everything they could before close on a Friday to reassure me.”
Griffin Chrysler Dodge Jeep RAM Service Department
“He understood my query and presented his response covering not only my reason for concern but also giving me possible outcomes and solutions should I ever run into any issue in the future.”
Greg's Garage
“They were wonderful to deal with, as long as they're here I would suggest them for all your auto/ truck needs!”
Why these companies made our list
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