hhmm... odd...
good for you that you've already tried all of those things.
sucks that it didn't fix the problem.

as I understand it along with my experiences, cruising on the highway, you should have enough natural air flow to maintain the temps. Since you are getting hot when you are going slower, I really don't think it is an airflow problem. I would lean more towards a coolant flow problem. I'm assuming that through all of this you've probably burped the system 3.5 dozen times. So I doubt it is an air bubble that is steaming up, and locking up the coolant flow. You said you have a new water pump so it should be moving enough coolant.

have you tried a new radiator cap?
If the system isn't pressurizing properly, then the coolant won't circulate correctly, so at the higher RPMs the water pump will just spin the same little bit of coolant around and around. Then once the rpm's are lower, the coolant can make its way around the whole system.

Since it cools off when you slow down, I doubt it is a clogged radiator. Typically when that happens it will just eventually get hot, then stay hot until you shut it off and let it sit and cool.

 

the only time i am getting hot while driving slow is when the a/c is on other wise the temp is very good 150-165. The temp rises the faster the car goes so i am starting to lean towards air flow being restriced some where. Are you allowed to drive with the bumper cover off in florida? i am wanting to try this and see how it goes.

 

Oh and i have another cap on order, but the system does have pressure currently

 

If its only getting hot when you are sitting still, with the a/c on, you need more airflow, either you need to upgrade to quality fans (cx racing, megan, isis) or whatever other bullshit out of indonesia is not going to move the air needed to keep the car cool at a standstill and with the a/c on. You can either get a quality condenser fan(s), or upgrade your main fans to something that will work good, grabbing a condenser fan from a J30, may fit and do the job, upgrading to something like a dual setup from SPAL, Derale, or oem fans from something that uses a quality setup will get you much better results.

A "cooling panel" you'll easily find available for s-chassis blocks the hood latch area before the radiator, forcing air to go through it, instead of around, also going through and sealing off the area around the edges helps direct air through the rad and condenser instead of around it. Another small one that will help is the silly looking prop the rear of the hood up with spacers, allowing air to better escape.

 

I cut some holes in the bumper last night after getting home and my trip to work this morning was 190-195 so it did give me a nice drop in temps. I will be takking the bumper off for the drive home tonight to make sure it is air flow.

From a standstill it takes along time to have the temp climg with the a/c on at least 30min to hit 190 with the isis shroud and fans, the altima fans MAYBE 1-2 min longer to reach that temp, flexlite was same or sooner then isis

I am considering adding a third fan, a puller on the condensor to see if that will help but it would require me adding a quest alternator if i want to run the a/c

 

maybe that's what I've been doing wrong all of these years.
I've been trying to actually fix the core issue and not just cover it up with other things.
shit.
no wonder I'm such an idiot.

cut up your bumper and set yourself a 500+ dollar, overkill e-fan set up.
you obviously can't flow enough air through the stock bumper with the stock fan set up with a damn near stock engine.
What was Nissan thinking....

 

i have a Koyo, S14 A/C fan (constant), S14 SR Hacked up shroud and Clutch Fan and my car runs ~180 at 12 noon on an 90 degree day doing 75mph on the highway...~184 with the A/C on. This was both with a stock JDM bumper and without.

i had a similar issue to you last year, replaced both the thermo and cap and haven't had a problem since. I'm gonna go +1 on shitty fans

 

Well he's already tried the stock fan and shroud, which you've stated cannot possibly be outdone, and flows plenty, will never break etc.

And hey, it didnt work good enough for what he wanted.

Clearly at 200* the car isnt "overheating" which seems to be you and chome's standard for cooling ability.

C'mon oh magical one, wheres your clutchfanmagic, please, heres your chance, get it to work great at stop lights.

(heres a hint, its not going to happen, to get considerable airflow at low speeds and red lights, just as i've already stated, it takes quality electric fans), clearly illustrated by cars using quality electric fans for the a/c, even if they do have a clutch fan.

Clutch fans dont move the air when you're sitting still, dumbshit, just face the fact and shut the fuck up with your repetitive stupidity that will only continue to be proven wrong.

Oh and for your idiotic "fix the real issue, not cover it up" bullshit, virtually every factory vehicle has the majority of what i've listed done stock, when you cut up the bumper to fit a front mounted intercooler, you remove a big piece of this, when people go removing and installing radiators and condensers this doesnt get put back, the factory designed it one way, people go changing things around, then wonder why it doesnt work, I just listed what was needed to get it back functioning like stock, you're a moron trying to list the OEM way being some "cover up.

 

I must commend you man. I've never seen someone so devoted to their ideas that they will twist the English language around so much to totally alter what someone was actually saying, and what they were implying just so you could argue your point further.
You're worse than freaking Catholics.

Myself, along with several others have told you that yes, you are right, spending that extra money and getting a "better" set up is in fact, better.
The part that you seem to be missing is that the stock set up is supposed to be more than ample to cool a near stock car. Shit, it should be more than enough to cool a moderately built car with a front mount and A/c on blast.
You of all people should know that when cruising on the interstate, as well as sitting still, you aren't boosting. No boost means no extra heat. Therefore, there shouldn't be anything beyond the ability of the stock cooling system. Normal people would see that and think that there is a problem if the stock system isn't doing what the stock system is capable of doing.

If this guy was bitching about running too hot while boosting to 30 pounds, then yeah, he'd need to step up his game to a much better cooling system.
Obviously, that isn't the case.
Obviously, his set up is well within the factory set up's capability.
So yes, going bigger and better would just be covering up the problem.


Can't wait to see how you are going to twist all of this around so you can call me an idiot again and argue a point that has nothing to do with the core issue.

 

Again, you must insist to comment, without even having some sort of grasp on whats actually going on, like a fool, that you've already been illustrated to be.

1. After installing things like a fmic, stock measures to direct cooling air, are often destroyed, i've mentioned this, and you as the fool you are suggested it was some trickery and foolishness to restore

2. You obviously cant seem to grasp that he DOESNT HAVE A CONDENSER FAN, either it wouldnt fit with his fmic (wouldnt be a surprise), or he / a previous owner removed it, and one hasnt made it back in its place.

3. With an A/C system yes it is going to generate lots of heat at idle, and even without a/c, idling at a red light and stop and go traffic will be the hottest times with a clutch fan setup, I dont know whats so hard to understand for you to just grasp this, but if you want to keep arguing that its not, just know that you're a retard.

4. With his setup with the lacking a/c condenser fan, the stock clutch fan CANNOT and WILL NOT keep up with the a/c on, at red lights, and again low speed, it simply cannot move the air, factory cars with clutch fans dont come with a/c condenser fans, for manufacturers own amusement.

5. With the often lack of space, in the bumper area, with an a/c condenser, and then a FMIC, there isnt usually an abundance of room for a good condenser fan, maybe you can begin to grasp why its much better to go with a quality electric fan setup, on the other side of things where SR/KA's have the extra space.