Replace knock sensor harness when replacing head gasket on Toyota 4Runner

The 3.0 V6 engine is usually prone to leaks in the head gasket after as little as 60,000 miles. When the head gasket is replaced, the knock sensor harness should be replaced as well, as it can be damaged by leaky head gaskets, resulting in a serious decrease in fuel efficiency or in long term engine damage.

RepairPal Verified
Average mileage: (–)
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
6 people reported this problem
0 people shared problem details
Related Items:
Check engine light was on so I had it hooked to an engine code analyzer and it indicated the throttle position sensor was the problem. Replaced the sensor with no improvement? Any suggestions?
Toyota Head bolt torque sequence
Check eng and two VSC lights on. Mechanic replaced O2 sensor and all lights off. Drove for tw...
I am having my head gasket replaced, along with machined head, timing chain guides, and all nec...
vehicle stopped running after I turned the corner. have replaced the radiator, knock sensor, s...

Related Content