Weird cooling issue with s14 SR20DET

[ep3scott]

Hey guys,

It's starting to get hotter here and I've noticed a weird issue with my sr20det it.

Normally it runs pretty cool, maybe 167f coolant and 185f oil, however recently the temps started going up.

I took the car off the road and replaced the water pump, thermostat, coolant temp sensor and fans.

I drove the car today and on the freeway it was reaching temps of around 200 for coolant and 210 for oil.

Here's the weird thing, I did a pretty big pull, maybe 4th gear to red line, I look down and the temps have dropped right down. Like 40 degrees lower in the coolant and the oil starts to drop down as a result.

Anyone got any idea why it would do that? Now whenever it starts getting hot I do a pull or a skid and it'll start getting cool again!

Any help would be great!

[zenkicpe]

Possible air in system - Burp it out using a funnel and an elevated front end.

Possible bad rad cap - Not holding pressure steady.

Possible bad/missing thermostat - Thermo could be going wacky on you opening and closing or just stuck open.

Possible failing water pump.

Possible bad head gasket.

In that order.

[ep3scott]

Thanks for the insight man!

I've replaced the pump and thermostat already. Air, Rad cap or HG...alrighty, I can work with that.

[zenkicpe]

You got it, let us know if you get it fixed.