Mybaby

Generally speaking, (after car has warmed up) what would be a normal operating Water Temp for a sitting FD as well what would be a dangerous reading. (I'm taking my reading off my Power FC commander)
I'm trying to gauge whether or not I have a coolant problem cause car hasn't been running in months (due to accident).
Engine is brand new though with only 2K on it.
Car is fixed and I think I may be having some coolant issues but am unsure of these temps.
Coolant level is fine but dash light comes on when car is warmed up.
After warm I am also getting bubbling in the coolant fill tank? I believe car is running to hot?
Any help would be appreciated. Thanks

RX7 RAGE

iTrader: (22)

Well what are your temps on the pfc commander? I typically see 81 - 88 celsius for my car.

FDSeoul

iTrader: (8)

^sounds about right. i get spikes when i dont move around 91c and then back to as low as 76c

SLOASFK

iTrader: (5)

If by coolant fill tank, you mean the small plastic tank that is attached to the radiator with a radiator cap on it, that is the Air Seperator Tank. It's entire purpose is to remove air bubbles from the coolant system.

With a Koyo 3-core rad, I typically see 80 degrees on my commander in winter, 90-95 degrees in summer. They say 80 degrees is fully warmed up for these cars, 90-100 is normal operating temperature, 105+ you need to keep a close eye on your temps and over 110 you should probably shut down. Damage begins to occur around 120, IIRC.

Mybaby

The PLASTIC FILLER tank (location is behind the pass side headlight) not the AST and not the one attached to the water pump.
My temps are definately to hot. I've got a Koyo Rad as well.
I am seeing 115. Then shutting down to avoid any problems.
I hear a bunch of boiling in the plastic filler tank.
At that point I am seeing some smoke but can't detect where it is coming from.
Should I be having this problem from a newly built engine (keep in mind its been sitting for about 9mths).
After shut down I also hear coolant moving about near the Lower Manifold and possibly by the turbo's but can't see exactly were its coming from.
I assume the light comes on the the dash gauge comes on cause the Coolant Temp to hot.
Also I am not detecting any leaks...
Thanks for the help thus far more would be appreciated....

mono4lamar

iTrader: (32)

The red coolant light is related to the level. Sounds like you honestly have air in the system. The burbling noise after it is overheated is the cap venting off the pressure to the overflow tank. Fill up the system, burp it, and start it up and cap it off in 2 min intervals... After it stops taking in coolant pressurize the system and check it for leaks.

SLOASFK

iTrader: (5)

The plastic tank behind the passanger headlight is the overflow tank. You should fill and burp the system from the highest point in the system. This will either be the thermostat housing, which is attached to the waterpump (just above the smog pump), or the AST. Stock, it's the Thermostat housing, but since you have an aftermarket radiator, you'll have to base it on what heigh you mounted your AST.

I agree with Lance, it sounds like you have air in your system. Burp it, and see what happens.

Mybaby

Please don't kill me for this one.
Though I owned my car since 95 (original owner).
I have never come across this problem.
As such could you please describe what you me an by burping the system? I apologize for the nobu question.....
By burping do you mean fill system. Remove the cap from the thermostat housing.
Let the car come to temp. Then the excess air should bubble out this opening.
Kind of like the champagne test I heard of on the forum?
Thanks

Mahjik

iTrader: (1)

Here's how I do it:

https://www.rx7club.com/showpost.php...21&postcount=4

adam c

iTrader: (2)

A sitting FD's water temps will go up until he fans turn on to cool it down. The setting of the fans will determine how high the temps will go. With a PFC, you can set the fans to come on at the temp you want.

Mybaby

Thanks for all the help.
I will give it a whirl and see what happens.
Adam C nice car. I've got a 95 Chaste white PEP..

Mybaby

I've looked through the FC Commander handbook and can not find where to change the fan settings?
Anyone??

Mahjik

iTrader: (1)

You need the Datalogit to adjust the fans.

Mybaby

thanks

FD3SRotary

No more than 110

FDSeoul

iTrader: (8)

110 is where i start to worry!!! the thing to do is get a lower temp thermostat and reset the PFC to kick over the fans @ a lower rate via datalogit, having a larger radiator is always a plus.(the older fd with oem radiators tend to crack at the joints.)

tragic00

damn you guys and your celsius's lol.

i run between 150-175 fahrenheit and thats down in south florida with the loveable humidity