Automotive component solutions
Automotive Cooling System Leak Testing
Design the fixture and test method around the sealed circuit, its internal volume and the production decision.
Request a QuoteComponent and fixture scope
Cooling circuits join multiple components, so a production test starts by defining which cavity is being measured. Radiators, hoses, pumps and coolant plates can each need a dedicated seal strategy rather than a single assumption about the complete vehicle system. The automotive hub identifies factory leak testing as a way to find faulty components before they ship.
Select an air-leak-test method
Pressure decay measures pressure loss after a sealed part is filled. Vacuum decay instead observes vacuum change after evacuation. Either method depends on a stable test volume, repeatable seals and enough time for the part and test gas to stabilize. The fixture design guide explains why fixture seals, clamp force and internal volume belong in the plan.
Production considerations
For a component with a designed flow path, mass flow is a peer air-leak-test method that measures gas moving through the part. It is not a replacement claim for pressure or vacuum decay; the production team chooses among methods from the part requirement and fixture. When a very tight requirement calls for trace gas, treat trace gas leak testing as a peer product line, not as air testing.
Plan the next review
EV coolant plates are part of the battery thermal-management system. Link the coolant circuit decision to the Battery & EV leak-testing hub so the cooling plate, enclosure and other battery stages can be evaluated in context. This page does not claim an IP rating or a standards outcome.
Build a repeatable station
Use the production requirement to define a sequence: locate the part, create the intended seal, fill or evacuate the defined cavity, allow the condition to stabilize, measure, vent and communicate the result. Each step is part of the measurement system. A short cycle is useful only when the fixture and process produce a repeatable decision.
Document the nominal part condition and the variables that can change it: temperature, material response, connection geometry, internal volume and the number of cavities. The fixture guide calls out these practical inputs because an added hose, seal or manifold volume can affect the test condition. A production review should make those inputs visible rather than relying on trial-and-error settings.
Plan a representative study before releasing the station. It should include good parts, known defects or a suitable reference where available, normal operator sequence and realistic environmental conditions. The goal is to understand the station result for the defined requirement; this content does not publish a universal leak limit, cycle time, gage R&R result or standard-compliance claim.
Keep traceability decisions separate from the leak method. The cell can retain the selected program and result through its configured interfaces; see the PLC and automation integration guide for the published interface matrix and station-architecture questions.
Sources and next steps
This application page is based on the automotive leak-testing hub, the published pressure-decay, vacuum-decay and mass-flow method pages, the fixture design guide and the linked automotive or IP resources. It is intended to help an engineering team frame an application conversation, not to replace part-specific validation.
Bring drawings or the part, port and cavity information, target production sequence, required result handling and any applicable customer requirement to the discussion. Zaxis can then scope the tester, fixture and station options around the real component. Use the request-for-quote path to begin that review.
Frequently asked questions
Which automotive components does this page cover?
Automotive Cooling System Leak Testing planning for the components named on the page.
Should pressure or vacuum decay be used?
Choose from the part cavity, fixture and production requirement; review both method pages.
Can mass flow be used?
Mass flow is a peer air-test method when a flow-based measurement fits the part and requirement.
When should trace gas be discussed?
Discuss the separate trace-gas line when the application requires it.
What should a fixture review include?
The part cavity, seals, ports, clamp force, internal volume and acceptance requirement.
