Finding the Weak Link in Nissan KA24 SOHC Engines
The KA24 engine is actually a pretty darn good engine (which compounds the problem) yet if it has a weak link, it is the big long timing chain and tensioner system in the front of the block.
Nissan: Solving Rotating Electrical Issues
Maybe the warning light on the dash has caught the attention of the customer who was lucky enough to make it to your shop, or not so lucky and their car needs to be towed, says Import Specialist Contributor Bob Dowie. Whatever the scenario, don’t be too quick to jump to conclusions when diagnosing rotating electrical issues.
Tech Tip: Nissan Quest is Experiencing Brake Lock-Up
Contaminated brake fluid may have blocked the ABS modulator valves or the “dampener valve.” The dampener valve is a component that is screwed into one of the outlet ports of the master cylinder. The brake line for the left-front and right-rear brakes come out of this part. Another possibility is that the ABS system component failure is causing brake pressure not to be released.
Tech Tip: Nissan Fuel Gauge Issues and/or DTC P0461, P0462 or P0463
If you confirm the fuel gauge is erratic, inaccurate or inoperative and/or the MIL is on with DTC P0461, P0462 or P0463 stored in self-diagnosis, replace the fuel lever sensor unit.
Tech Tip: Nissan’s Front Suspension Noise When Turning
Confirm that a noise (clunking, popping or bumping) is coming from the front strut assembly when the steering wheel is turned.
TECH TIP: NISSAN: ABS SELF-CHECK NOISE
Each time the ignition is turned on and the vehicle is driven at about 16 mph, the ABS/VDC system performs a “Self-Check” to confirm components of the ABS/VDC system are operating correctly.
Tech Tip: Nissan MIL On, DTC P0603 – ECM Power Supply
If you have a vehicle with the MIL on that has a DTC P0603 stored in the ECM, perform the diagnostic steps in this bulletin first.
Tech Tip: Nissan Low Airflow from HVAC Front Air Vents
If you confirm one of the above vehicles has low airflow coming from the HVAC front air vents due to evaporator freeze-up, and the HVAC unit surface temperature around the evaporator is about 32 degrees Fahrenheit, causing ice to form on the evaporator, follow the Service Procedure in this Tech Tip, which involves replacing the intake sensor with P/N 27700-ZC00A.
Tech Tip: Nissan Rattling/Buzzing Noises in the Exhaust System
If you confirm there is an exhaust rattle/buzzing noise that sounds like it’s coming from the front exhaust tube, follow the procedures provided in this Tech Tip.
Tech Tip: Nissan DTC P0420 Stored in ECM
If you confirm DTC P0420 (Catalyst System Efficiency Below Threshold) is stored in the ECM, determine if this bulletin applies by checking the ECM part number.