Hey guys i seem to have me a(n) overheating problem......i've changed my thermostat, water pump, new radiator cap, and even got a Koyo radiator and my box is filling up my over flow tank and over heating like a mother. im running out of options and am not sure of what to do next.......any input on the matter would be very helpful.......but on a side note my box runs like a beast when its not overheating and misfiring (bad wiring) like i can go from 60mph to 120+mph in like 10seconds over and over again when before it took a really long time to even get to 115mph....

 

Anything? well ima try one more thing and that is change my belts and hope that its the problem

 

did u put the thermostat in upside down/backwards?

 

nope i put it in the same way i took it out......but its not my belt ether so on the my next assumption and that is that i have a blown head gasket so now ima have to pull this motor and put in my other one and build the one im pullin out

 

+1 to the head gasket. How's the exhaust? White smoke? Also, check the oil cap. Any condensation up top?

Also, take it to a radiator place, they'll prolly do a pressure check for free.

 

i dont think i know where a radiator place is......as far as smoke goes i believe i have some white smoke coming out the back, but not much; just noticable when its a lil cool out and da box is just sittin there.....but i do have residue all over the back of my car like the whole trunk area and when i rub my hand over it i have black gunk like what you would find under the hood on my hands......how much does a headgasket job run? cuzz i rather not mess with my timing.....

 

i think i have the same problem with my bro's srt...its either thermostat or head gasket my thermostat theory is not the case coz ive changed it already,...so its gotta be my head gasket..


x2 on the head gasket job how much..?

 

just one question why would it be the head gasket? is your fan working if it is then the temp shouldnt be rising up check your oil and if it contains water then you blew the gasket

 

yea my fan is working and i believe my head gasket would b gone from the coolent/oil that is all over the back of my trunk

 

well good luck

 

thx

 

yup we all now a Toyota engineers and builds thier cars like dodge


Someone also mentioned installing the thermostat backwards??????? which is impossible on this engine.

Seriously, your headgasket is blown, you will be handing over some flow to get it repaired. However if you are misfiring (highly doubt the wiring is bad unless you messed with it) there is a pretty good possibility that you have a dead hole, which means a cylinder would hold little to no pressure, a compression test will reveal this. If that is the case, you would be looking into getting used motor as that would be the more economical solution.

 

i have another motor....i did a comp test and everything is fine there.......i have a misfiring problem because for some reason i have two torn wires where the connector is.....i fixxed the problem someone what but occation it may come back and goes away......but i havent had a misfire for a few days now since i refixed the wiring so hopefully im good there.....but yea im pretty sure ill b handing over some flow for the head gasket job unless i do it myself in turn i really dont feel like doin it myself.....rather just drop in the other motor just to make it easier on myself......

 

white vapor from the exhaust is pretty common on start-up. Especially on cold and/or humid days. If it goes away pretty fast it could just be water vapor from condensation in the exhaust or water produced as a byproduct of combustion of the engine.

What kind of aftermarket work is done to the engine?

 

I/H/E then there is the pulley and the stage 4 clutch and a lead foot but yea i figured that too but then agian i figure that after running for a good minute or so that if there were water vapors that it would b gone and stop smoking and what not......plus its not that cold here in GA except of course when its night time....but yea its not smoking really bad.....

 

you can tell if its burning your antifreeze due to the sweet smell in your exhaust

 

i cant tell what i smell when i was smelling my exhaust haha

 

^^^ Dude, quit sniffin your farts! You're not driving a prius!

Before you tear down the car, do a pressure/leakdown test on the cylinders. Much easier and will tell if you have block problems.

 

if it aint the head, if it aint the fans, if it ain't a cylinder
problem, you sure your purging all the air out during the
radiator, cap, water pump, etc.,. even a small air pocket will
expand and blow out, if it aint that, then recheck when the
fans are coming on and off, a bad temp sensor telling the
PCM when to duty the fans may be the problem, do you have
a scanner, live data the temp sensor, compare to a laser
temp sensor readings you take at the thermostat housing, if
its way off, then the sensor may be to blame, if its cycling off
before the temp drops etc.,. pressure test the system,
check your radiator fins (i know its new, but cover bases)..
I've seen a lot of this with all kinds of cars due to air
pockets that werent completely purged.. start cold fill it up,
let it run with the cap off, heater on (fan speed low), keep
topping it off, shut the heater off, and keep topping it off until
the fans cycle twice, by then all the air should be out. Good
luck!! P.S. I have also seen thios on the box with various
body kits that cut out airflow to the radiator (like the Fab)

 

Happy trails, good luck with the swap.
replacing the motor in an XB is pretty easy, i have had one out and a new one back in an hour.

If you need any tips to make the swap go faster or need help feel free to ask.