Hey, I was wondering if any one on here has ever ran their car w/out the thermostat in it. I replaced my theremostat and now the guage is reading almost FULL hot and then it will go back down to like 3/4 and then back up and so on. Should I just try a new thermostat or take it out...someone on 240sx.org told me that if i take it out it will run in "warm-up" mode and be running really rich. Thanks.

 

meh I havent had trouble taking it out. Just make sure your car is fully warmed up before you push it

 

i ahd mine out for a while. the problem is that if you never let a motor fully warm up, the engine internals never fully get to temp (i.e piston expansion) and therefore you will have premature engine wear. and yes, there is a chance that it will run rich.

 

nissans are bitches in that if the t stat is not straight up, they might not bleed properly and open properly.

 

also...any rust in the radiator?

 

What part of the thermostat needs to be straight up?? And also when I took it all apart there was rust in the radiator but I flushed it and i also flushed the block.

 

so youre saying that you have to motor apart or what. i had just about the same problems but my t-stat gauge would just read full hot.

i think mattback is talking about the small brass pin towards the edge of the t-stat.

 

Ive also got a cooling problem... or rather a heating problem on my hicas..

In the current weather.. if I put the heater on once i'm up to temperature (especially on the highway) it'll all of a sudden go WAY cold!!

I also need ot bleed and flush my coolant, as it has some rust in it... time for some radiatior flush!

 

How did u fix the guage from reading full hot? Did u put in a new thermostat? And also...the little brass pin, is that supposed to be the part that is straight up or what? I wanted to drive it to track day tomorrow (just as a spectator) but I don't really trust it.