Im having a overheat problem during idle, the temps keep climbing and climbing, when Im moving the temps are rock solid at 85C maximum.
Heat only creeps up while idling in traffic. I was able to turn the water pump pulley by hand, but upon looking at the pulley during idle, its not slipping at all.
Is it normal for the pulley to be able to be turned by hand ? also is it normal for your car to keep creeping with high temps up to 110C ?

Thanks

 

With the belt off, yes, you can turn the water pump pulley by hand.

What mods do you have? Stock? FMIC? SMIC, is your fan turning on? Usually your temp should stay around 86-90C at idle. Mine always stay below 86C with FMIC.

Also, did u upgraded your thermoswitch to a FC thermoswitch? That kick on the Fan alot earlier compared to the FD thermoswitch.

-AzEKnightz

 

Its turning by hand with the belt on, and I have a V mount setup, during normal driving it stays around 82~85C max. but in traffic it will keep creeping up, just replaced thermostat with brand new oem as well, and changed coolant ratio with more water which helped, but still creeping in traffic

 

your temps, is this with fans set to kick in early ? as If I turn the fans on it will drop it to around 84C

 

You should invest in a Tweakit or Pineapple Racing pulley.
They give better tension on the WP pulley and help prevent slip...

You shouldn't be able to spin the pulley by hand with the belt on tight..

L8R

 

Another cause of that is getting oil on the belts or pulleys.

I've experienced this when I forget to empty the catch can on my autox FD.

 

Right,

May need to change out the pulley and belt then, also my filler neck has one nipple blocked and one just left open, maybe hence the slippery pulley ? should I be just hooking one hose from one of the nipples to a catch tank and put a breather filter on the catch tank ?

 

so you are saying that if you turn on the fans (how are you doing this?) in traffic the temp will stay around 85c??

if this is the case why do you think that the pully slipping is the cause of the high temps? it is more likely to slip at 5k rpms than it is at <1k. sounds like the the fans are not turning on, when driving the airflow is keeping the temps down

changing the pully set up may be a good idea but i dont see it fixing your concern

 

I believe they are assuming you still have the fan, but I think you mostly dont because of the V-Mount, therefore I would look into investing a new belt, OR tighten the belt a bit more to prevent any slipperage if money is an issue. But sounds like to me your pulley is/could be slipping and resulting less flow from the water pump and higher temp.

-AzEKnightz

 

I do have my fans, I dont have a/c, but turning on the a/c will turn the fans on.

right so my next question is, with out the fans going, is it perfectly normal for the water temps keep going up until fans kick it back down ?

thanks

 

yes. a very common cause of overheating in any car is a fault in the fan control system. i cannot think of any mod that would remove the cooling fans that would be crazy

so with a pfc or via a thermoswitch change you should change the fan turn on point.
also verify that all the relays work ie low medium and high speed.

 

You need to think about how the cooling works.

The cooling system is using coolant/water to remove the heat from engine/turbos. To remove the heat from the coolant, it runs through the radiator. The metal in the radiator can only radiate so much heat, so it relies on ambient air flowing across the radiator to cool it and the coolant inside. When the car is not moving (or moving slowly), there is no ambient air (i.e. at a stop light) or very little air from the low speed. In those cases, the fans come on to remove heat when there isn't enough air flow from the car moving.

If your car is overheating while you are driving at normal speeds, then you have other problem as you shouldn't need your fans while the car is in motion.

 

If your t-stat is opening correctly, with normal idling at a stop or so and your thermoswitch is functioning properly. Then then fan should kick on and lower your temp.

However it seems like you have to "manually" turn on the fan by turning on the AC. Therefore I would look into either if you can adjust the fan speed through the PFC, or do the FC thermoswitch mod and make sure the fan controls are set correctly.

-AzEKnightz

 

right, so Im just being a bit pedantic about my water temps I think, My water temps are rock solid at 82~84C during normal driving, in traffic it will climb above 100C, and I havent had it above that to see if the fans kick on , to my knowledge the stock fans settings turn them on above 105C ? I have not let it get that high to check if they come on , I will change the PFC settings to come on maybe around 94 C.

thanks

 

overtightening the belt to keep the waterpump pulley from slipping can result in bearing damage. Do everything mentioned above, but also invest in an idler pulley as lwnslw mentioned above