ok im just waking up. I also forgot a rad cap can even cause a temps to spike. yeah sounds stupid i know. but it so true. If it was me. I would go thru the simple shit first. replace the thermostat and the rad cap. then see about bleeding the air out of the system. take your time bleeding it. last time i bleed my car it took like 15+ minutes to get all the air out. then take it out for a ride and see whats up.

because you mentioned you have had coolant under the car before. while your out get a piece of cardboard thats big enuff to go from tire to tire, bumper to fire wall. when you get where ever you are going place it under the car. I know it sounds stupid. but this way you can see if there is any fluid coming from your car and not someone elses prior to you parking.

IMHO instead of busting your balls on some of these rad. check out the yashimoto's. (sp?) they are cheaper than the fludyne (sp?) as well they come w/ fans sometimes. so you can sell those off to someone else. also you dont have to get a nismo thermostat. either go get one from nissan or go to autozone or something like that and get one there. just be sure to get something that is oem spec "170" I've been running one of those duralast thermostats w/ no issues.

try that and see if it helps.

now its steak and eggs time. i <3 breakfast.
~skott

 

just say not to fan clutchs, even if you put a flex fan on w/ it.. just another form of parasitic drag and yes they do can go bad too.

 

yeah, moshimoto radiators work fine.

and +1 on the cardboard idea. its easy and it works well to see where water is coming from.

 

mishimoto* koyo knockoff i believe

 

edited and fixored.

 

electric fan puts more strain on the electrical system which affects spark.
put it this way. clutch fan, on a typical sr on the dyno, youre talking maaaaaybe a 2 hp. loss.
same car with a taurus single electrical fan, wired through relays, cost nearly 10hp. i have dyno charts to prove it somewhere on my computer at home.

theres a reason these cars come with clutch fans. its the best way to do it.
why do you also think some of the most well built schassis cars in the counrty still use clutch fans? and japan as well?

sure, some people use electrical fans with success, but one will never find its way onto my perfectly cool, even when being beaten on car.

 

very possible, but seems weird that air bubble would only cause problems with the fans on.

 

might just be a coincidence (sp?) that the fans are one once the thermostat opens up and starts the coolant really flowing?

I've had bubbles that didn't come out for days. I was driving home one night then all of the sudden, my needle started to tweak. got home and bleed out some air like I had just filled it up.
Pesky heater core bubbles

 

dude mishimoto is the next radiator ima run, i have nothing at all against em, i love em, i have a HUGE griffin right now so i dont need it but i am going to get one, that bitch is like 175 (half of a koyo lol) and is the same thing...i agree completely

 

thanks, Im going to just replace the water pump, put a 170 degree thermostate in and flush the system prior to that and pu the clutch fan on and take fans off possibly...I would like to hear more of a debate about clutch fan verse electric when it comes to horsepower loss or gain.