prenobi

Hi,

I was driving back to LA from Las Vegas a few days ago. It was around midnight, and the desert temp was about 40 degree F.

Anyways, when I increased my cruising speed from 85MPH to 95MPH, the temperature gauge started to drop to C(cold). As a result, I couldn't get any warm air from the vent.

Either my radiator is working very well at keeping my engine cool, or there's definitely something wrong. Any idea? Thermostat? Radiator?

Oh, I have a '94 regular Max w/ 133K of love and hate relationship.

Thanks in advance for any suggestion

Bye-bye,

Alan

Soul Fly

a regular max? well..the exact same thing happens w/ my max. it's one of 2 things. either your heater core, or thermostat. not your radiator.

prenobi

Sorry, I meant a "regular" Max as oppose to the "SE."

Anyways, thanks for your input. Can you explain to me what's "heat core?" And how much for parts and labor? Thanks.

Oh, let's me know if my reasoning makes sense. I don't think it's the thermostat, because if it's the problem than I would also have the temp. gauge moving to H (hot) during normal driving condition. By the way, it's not the gauge because I had the whole gauge replace about a month ago.

Thanks again.

Alan

Soul Fly

a heater core is just like a small radiator btwn the engine and the A/C unit...in the dash, umm, i looked for on the other day at Auto Zone...not in stock. but a thermostat is like $15, but not sure on labor. just take it to a grease monkey one day and have him look at it..

eric93SE

iTrader: (1)

No, it sounds like it is exactly the thermostate. Fortunatley you have a thermostate that gets stuck in the 'open' position (AKA a fail safe thermostate) if you didnt then you could have had a hose burst or something more common which is a freeze plug failing.

So my suggestion is to get a new thermostate, but get a good one that is a fail safe thermostate. I'm using a Stant thermostate, unfortunatly it is not a fail safe thermostate. So, get it from the Nissan dealer. Also make sure you use fresh antifreeze that is mixed half with water.

I should also mention that changing the thermostate on your engine is'nt easy (so they say, I have the VE and its easy). If the water pump is original then you should go ahead and have that done as well, because they are in the same area. use the search function to find tips for doing the job on your engine (vg).

prenobi

thanks a million y'all