Overheating problem on 3sgte,need help PICS

[Jorrs]

its called the Tee-Kay test, and its not free.

cheap though.

tests for exhaust gasses in the coolant.

Eldar.O.

was free for me, they have a big sign out front saying it

[Aust162]

Chuck, havnt checked the spark plugs yet. using bkr6e's.

Intake air temp is connected. its tee'd into my intercooler piping near the TB inlet.Its real cold at night in victoria atm. i'm getting temps of 4-25degrees.

Been running nulon red coolant and 50/50mix. motor and waterpump are 3000kms old. pump is an aftermarket unit. (made in japan though)

Radiator was looked at about 12mths ago.maybe 5000kms. i had a new top tank fitted and the core flushed.
Wel i was thinking the radiator might be blocked, becuase it was sitting upright in my garage for mths,so shit might have settled in the bottom. i'm gonna pull that off today and stick the hose in it.

So with the thermostat open (at temp) and the cap off, i should see the coolant flowing?The haynes book also said to squezze the top hose and let it go, and if you feel resistance the pump is working.

[mic*]

Since you had the engine rebuilt and the thermo was blocked, check that there is not a whole heap of shit that was blocked up behind it. Or that shit has not just pushed through & choked up the new thermo.

[Aust162]

when i had the old thermostat out last night i poured some water through the top hose and it it seemed to flow out the thermostat housing/back out water pump fine. i had a thought there might be a blockage there, but i think its fine.

[Robbos_Toyotas]

does the oil look like a smoothie or is it ok?

[Classique71]

have you done a coolant / gas check yet

creamy sludge on the cap is a good sign of BHG .. this is how we first spotted mine had bitten the dust

thats the first thihg you should chck then work from there

[Aust162]

Oil looks fine. and that sludge that i had in my catch can has gone. i think it was condensation.

As for coolant/gas test i've done this--->

I borrowed their cooling system pressure tester and tested it. My cooling system held just over 15psi over 5mins.(i pumped it to 16.5psi, and it lost about 1psi.i found that i had a tiny split in one of my heater hoses,and i'm certain that's where it was loosing that 1psi of pressure)

After this i disconnected the coil lead (with the pressure still being held in the cooling system) and cranked the car several times. the guage on the tester didnt move. it held the 15psi no problem.

I was told that if i got these results,that the h/g will be fine... i'm hoping it is?

I was told when you crank the motor, adding pressure into the cylinders, you would see if there was a combustion leak on the pressure tester. if there was a leak, the gas would add pressure to the cooling system and shwo up on the pressure guage.

[Aust162]

I've had the car briefly looked at by the local natrad. i was told of a few ways to test the waterpump is operating, and that i should now try and run the car without a thermostat and see what it does.

Car is apart atm. here are some pics. I checked to see if the waterpump had sheared the propeller off, but i cant spin it by hand (timing belt is on,holding otherside still).

In one of the pics you can see some coolant weaping through what i think is the drain hole? i know with rwd waterpumps they have these hole's,so when the bearing dies the coolant drains out it.







So, not sure what to do at this stage. im pretty confident my 2nd thermostat is doing its job, so im thinking w/pump or blocked core. maybe h/g

[Aust162]

And i thought i'd check the plugs to (thechuckster). to see whats going on there.

bkr6e's

from left to right, 1-4. And Yes, they are all from the same motor..

1 being closest to oil cap and 4 being closest to dizzy cap.

These results might have something to do with my current "overheating" problem? i dont know..





no:1

no:2

no:3

no:4

[BeRad]

just standard on a 3sgte with the stock manifold, have you checkd the radiator to see if it doesnt have clumps of shit stuck in it?..

[Aust162]

with regards to the plugs: the further away from the fuel reg, the leaner the cylinder seems to be. (going by the plug's condition's)When i've changed my plugs in the past, they've all looked to be in the same condition..

I probably better start another thread on this now! i need a forum dedicated to my shitbox.

[-==L=a=N=c=E==-]

fueling issues on 3sgte's arn't new. So i'm not surprised to see your plugs like that.

Then again, if your using stock injectors, it shouldn't be as bad as your showing, possibly get your injectors cleaened woudl be in your best interest.


Other then that i can't explain your overheating issues, beats everything else, and we've discussed it over msn too, so yeah, got me stumped.

[Robbos_Toyotas]

I must tell you, dont run the thing without a thermostat. Particularly a little alloy headed turbo... I tried running my 302 without a thermostat, and it was running hotter than it did with one!! They regulate the flow by having one, without one the water flows too quick to be cooled down properly in the radiator - meaning it just keeps pushing around hot water, making it hotter...Even if you lower the opening temp (i think they are 88 stock?) find one that opens at 82 perhaps?? I run a 71" in my 302...it works perfect!

Blake

[Andrew162]

On my once-troublesome RAV4, with Gen3 3S-GTE, I had the same problem. Couldn't trace it at all. It was overheating, thought it was a BHG but no, replaced anyway. Was sucking coolant down and later spitting it back out into the reserve bottle. Tried a standard 82deg thermostat and a 71deg TRD thermostat, both had the same troubles, not seeming to open. Tried using no thermostat at all (not recommended), same problem but a more prolonged period.

Finally the problem was found inisde the head... one of the 2 exhaust ports on #2 cyl had a slight crack in it, allowing coolant to seep through and making the engine overheat easily. Fixed the problem (welded) after it became too difficult to track down another suitable head. Problem never came back again.

Might be nothing to do with yours, but similar symptoms, and while yours is all apart, it's something worthy of looking into if you're interested.

Cheers.

[Vios-GT_07]

yeap...

1. retorque head yet?
2. 100% sure that coolant is flowing?
3. all hoses are good? heater core leaking?
4. When you did your HG did you pressure test the head?
5. sort out all the thermostat?
6. when cold, start car and take out the radiator cap.. any bubbles?
7. coolant temp sensors?
8. fans spinning the right way? not reversed or anything?

to a lesser extent
. from the plugs i can see it's not running lean, make sure it's not though
. Is your timing too high advance?
. shaved the head when u did HG?

the comes the harder issues

. does the water pump spin freely? if u have to remove the timing belt
. worse case scenario, take out the head and do a pressure test again

that's all i can think of at the moment...