Coolant pump O-ring seal or gasket
Thermostat housing
Radiator
Pressure relief cap
Coolant pump leaking from weep hole
Heater core
Engine gaskets (may leak internally or externally)
Degas bottle
Cylinder block core plugs
Cylinder head core plugs
Block heater (if equipped)
DIAGNOSIS AND TESTING > ENGINE COOLING > PINPOINT TESTS > PINPOINT
TEST A : PINPOINT TEST > PINPOINT TEST A : PINPOINT TEST
WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
A1 CARRY OUT INSPECTION AND VERIFICATION
Carry out Inspection and Verification .
Are any concerns present?
Yes | REPAIR as needed. |
|---|
No | GO to A2 |
|---|
NOTE: Allow the engine to cool before checking the engine coolant level.
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.