98 Sentra EX Saloon Overheat

**corbon44** · August 16th, 2010 10:56 PM

No prob with the aux fans - they turn on at just below the halfway mark if the the a/c is off.

**dr. d** · August 16th, 2010 11:11 PM

ok. try your coolant reservoir. a leak or crack near the base is difficult to detect if you are looking from above. better if you remove it from the car. a crack at the base is impossible to detect without removing it.
but i still suspect the fans. because your symptoms are exactly like mine. btw, mine were initially intermittents. i had to wait for them to become more permanent for me to detect it.

**corbon44** · August 16th, 2010 11:32 PM

Cool, will check them chief. Thanks much!

**kompressor** · August 25th, 2010 06:04 PM

Try removing the thermostat and immerse it in a pan with water above the temp indicated on it (on the stove). If it opens up as it reaches the temp, then rule out the thermostat. If it remains closed, then it's already stuck and needs to be replaced.

**corbon44** · August 25th, 2010 08:57 PM

Sorry, double post...

**corbon44** · August 25th, 2010 08:58 PM

Took out the thermostat and ran it for a day - didn't overheat anymore. Will replace it over the weekend. Thanks!

One more thing - I saw three waterplugs behind the engine right under the intake manifold where bypass hoses seemed to be previously attached. They seem to connect to three plugs on the firewall. Should these be live or are these really plugged on the EX Saloon?

Also, I blew an existing bypass hose (it's the one from near the thermostat housing to the cylinder block). Would this simply mean my hoses are wearing out normally or pressure is building up abnormally and I need to solve whatever's causing it?

Thanks again!

**ghosthunter** · August 26th, 2010 01:51 AM

Originally Posted by corbon44

Took out the thermostat and ran it for a day - didn't overheat anymore. Will replace it over the weekend. Thanks!

One more thing - I saw three waterplugs behind the engine right under the intake manifold where bypass hoses seemed to be previously attached. They seem to connect to three plugs on the firewall. Should these be live or are these really plugged on the EX Saloon?

Normally it should be live if you want to enable the heater feature of your A/C.

Also, I blew an existing bypass hose (it's the one from near the thermostat housing to the cylinder block). Would this simply mean my hoses are wearing out normally or pressure is building up abnormally and I need to solve whatever's causing it?

Hoses normally wear out.