# Radiator Mounting Bracket and Isolator Repair in Upland > Rattle up front or a radiator that shifts over bumps? Route 66 Auto Repair in Upland replaces broken radiator brackets, clips and rubber isolators. Source: https://route66autorepairshop.com/cooling-heating-ac-services/radiator-mounting-bracket-repair Updated: 2026-09-17 Business: Route 66 Auto Repair, 1775 W Foothill Blvd, Upland, CA 91786, (909) 608-7699 Hours: Monday to Friday 8 AM–5 PM, Saturday 8 AM–2 PM, Sunday closed **TLDR:** A **rattle** over bumps can be a loose radiator. We replace brackets and **rubber isolators** before the vibration cracks a tank or chafes a hose. Radiators sit on small brackets, clips and rubber isolators that let them float slightly while absorbing road vibration. When a bracket snaps or an isolator crumbles, the radiator rattles, shifts on bumps and can rub through a hose or a fan. Route 66 Auto Repair in Upland replaces the small hardware that holds the radiator, checks the tank tabs for cracks and confirms nothing is touching. ## What are the signs of a broken radiator bracket? - Clunk or rattle from the front on rough pavement or driveways - Radiator that moves when you push the top by hand, engine off - Fan blade marks on the shroud from a shifting radiator - Worn spots on hoses or AC lines near the radiator - Rubber isolator pieces on the ground or on the splash shield ## Why do small mounts cause big problems? Most radiators have plastic tanks with molded pegs that sit in rubber isolators. The upper brackets hold them down. Vibration from potholes and speed bumps shakes a loose radiator, and the pegs can snap off the tank or a crack can start at their base. A radiator that shifts back can reach the fan. One that shifts sideways can rub an AC line. This page covers the brackets, clips and isolators. If the panel they bolt to is bent from a collision, see [radiator core support repair](https://route66autorepairshop.com/cooling-heating-ac-services/radiator-core-support-repair). For a general mounting overview, see [radiator mounting repair](https://route66autorepairshop.com/cooling-heating-ac-services/radiator-mounting-repair). ## Our bracket repair process 1. **Find the movement:** We push and pull the radiator by hand and inspect every mount, clip and isolator with a light. 2. **Check the tank pegs:** The molded pegs on the tanks are checked for cracks, which change the repair from bracket to radiator. 3. **Replace hardware:** Broken brackets, clips and worn isolators are replaced with parts that match the original fit. 4. **Clearance and road test:** We confirm fan, hose and line clearance, then road test over rough pavement to confirm the rattle is gone. ## What's included in bracket repair - Mount, clip and isolator inspection - Tank peg and tab crack check with photos - Replacement brackets and rubber isolators as quoted - Hose, AC line and fan clearance check - Road test for noise ## Does a loose radiator need fixing now? **Need now:** - Radiator touching the fan or moving freely - Hose or AC line rubbing through - A cracked tank peg with a coolant seep **Need later:** - Hardened isolators with a firm radiator - A bracket with light corrosion that still holds ## How pricing and timing work Brackets and isolators are small parts, but the lower isolators often require lifting the radiator slightly, which means loosening hoses or the fan. If the tank pegs are cracked, the written estimate will explain why a radiator is the lasting fix. Hardware jobs are usually done in a single visit when the board allows. ## After the repair The front end should be quiet on bumps. Glance at the ground for drips during the first week, since a moved radiator may have been stressing a hose. If a rattle returns, call [(909) 608-7699](tel:+19096087699). If the noise turns out to be from the suspension instead, our [suspension inspection](https://route66autorepairshop.com/diagnostics-and-inspections/suspension-inspection) can track it down. ## Frequently asked questions ### Can I zip-tie a loose radiator? It might quiet the noise for a while, but plastic ties soften with heat and do not absorb vibration. Proper brackets and isolators protect the tanks. ### Why did my radiator crack at the mount? Worn isolators let the radiator vibrate against metal. Over time that stress cracks the plastic peg or the tank near it. ### Are aftermarket brackets okay? Many fit well. We match the original design so the radiator sits at the right height and angle. --- Call (909) 608-7699 or visit https://route66autorepairshop.com/contact for a written estimate.