Brad’s 2019 Audi Q5 kept losing coolant onto his driveway. A pressure test traced the leak to a failed connection in a branching coolant line assembly. Here’s how Cory found the source and why he replaced the connected sections rather than just the broken piece.
When Brad noticed the coolant level was low in his 2019 Audi Q5, he added coolant to the reservoir. Instead of staying in the system, it leaked onto his driveway. He brought the Audi to Sherwood Auto Repair so we could investigate the source of the leak.
Cory began by confirming that the low-coolant warning was illuminated and the reservoir was empty. He filled the cooling system and installed a pressure tester to evaluate where coolant was escaping.
The testing revealed a failed crimp connection on a plastic coolant line. The line had separated from its quick-connect fitting. This wasn't an isolated hose running between two points: the assembly branched to the radiator and multiple locations on the cylinder head.
Based on the condition of the failed connection and the layout of the assembly, Cory recommended replacing the connected sections of coolant line rather than only the visibly broken portion. The recommendation was intended to reduce the risk of another section of the same assembly failing.
Brad approved the repair. Cory replaced the coolant lines, refilled the cooling system, and checked for leaks. He then road tested the Audi and verified that the repair was holding, with no leaks present at that time.
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