Connect with us

Tech Center

Coolant Leak Caution on 1995-2003 Nissan 3.0L, 3.5L Engines

Advertisement

CONDITION: A severe coolant leak from the water pump’s weep holes causes the coolant to destroy the pump’s bearing as well as leak into the engine’s oiling system. Catastrophic engine failure can result.

Advertisement
Click Here to Read More
Advertisement

CAUSE:  This engine’s water pump is buried beneath the timing cover since it is internally driven off the engine’s timing chain. Since the front of the pump has direct contact with the engine’s oiling system, the weep holes have been rerouted.  Leaking coolant is channeled back through the pump and into the engine block.  Therefore, if the water pump seal fails, the noticeable leaks will occur as coolant exits the left side of the engine block just below the thermostat housing.

CORRECTION: Be aware of the potential leak points and do not ignore the signs of a leak. It also is recommended that the water pump be changed whenever servicing the timing chain and/or internal timing components.

Use replacement water pump AIRTEX P/N AW9309.

–Courtesy of ASC Industries

Advertisement

POPULAR POSTS

Tech Center

Service Issues on Ford 4.6L SOHC & DOHC Engines

Carburetor Tuning: A/F Mixture, Air/Fuel Equation

Cleaning Engine Blocks & Engine Cylinder Heads

Ticking, Knocking Noise Complaints: Ford 4.6L / 5.4L 3V Engines

Connect