Water circulation

Tiny
BOVEE65
  • MEMBER
  • 2002 NISSAN 180SX
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
02 nissan exterra no water circulation when up to temp also little if any heat, cheked radiator, replaced thermostat. Water pump? Vapor lock?
Tuesday, March 8th, 2011 AT 3:31 PM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If there is any air trapped in system, the level at radiator neck would be low when cap is removed on a cold engine.

When coolant reaches operating temperature, the collant would not instantly start moving as the thermostat requires some time after that to start opening and even that, you might not notice any visible movement untill the temperature really heats up.

If ther is no heat, turn the heater on to maximum and run engine without radiator cap on and note if there are any bubbles.

Have you checked the heater core for clogging?
Is the engine overheating?
Are the cooling fans working?
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Thursday, April 7th, 2011 AT 6:41 PM

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