Nissan Pick-ups and Pathfinder 1989-1995




Inspect the condition of the radiator, heater hoses and clamps periodically. Early spring and late fall are often good times to perform this, as well as other routine maintenance. Make sure the engine and cooling system are cold. Visually inspect for cracked, rotted or collapsed hoses, and replace as necessary. Run your hand along the length of the hose. If a weak or swollen spot is noted when squeezing the hose wall, replace the hose.


  1. Drain the cooling system into a suitable container (if the coolant is to be reused).

When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. Loosen the hose clamps at each end of the hose that requires replacement.
  3. Twist, pull and slide the hose off the radiator, water pump, thermostat housing or heater connection.
  5. Clean the hose mounting connections. Inspect the hose clamps and replace any which are rusted or worn.
  7. Position the hose clamps on the new hose.
  9. Coat the connection surfaces with a water resistant sealer or equivalent and slide the hose into position. Make sure the hose clamps are located beyond the raised bead of the connector (if equipped) and centered in the clamping area of the connection.
  11. Tighten the clamps evenly. Do not overtighten.
  13. Refill the cooling system.
  15. Start the engine and allow it to reach normal operating temperature. Check for coolant leaks, then top off the coolant level as necessary.