Coolant Leak From Heater Core on Lincoln MKZ

Submitted by Jim Taddei · May 29, 2025
Published by RepairPal

Problem overview

A coolant leak may develop from the heater core. The failure may be due to electrolysis. Our technicians recommend to check for voltage in the coolant with the battery disconnected. If voltage is found the cooling system should be flushed and jumper wires added to engine ground straps as necessary.

7 people reported this problem
2 comments
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Lincoln MKZ vehicles with this problem

1 model year affected
Average mileage: 48,000 miles
(20,000 - 76,000)

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