Sorry for another overheating thread. I've checked and tried everything. bled coolant. no leaks. no oil/coolant mixing. comp tested ok. fans work. switched to 1/2 rad to move away from turbo (heat soak). flushed coolant - all clean. now using 80/20 w/ water wetter. thermostat oem.

overheats to 3/4 after about 15mins of driving. from a sitting, it will run for hrs without overheating. heater won't drop temps. only drops when i slow down / sit for awhile.

the dp is about a milli from the oil pan. could this heatsoak engine oil and raise temps?

i don't have a catch can. could insufficient crank ventilation raise temps?

 

if I were you, id try heat wrapping your downpipe and whatever else you can.

 

Are all your hoses correct? Have you plugged any coolant ports, that could lead to air inside the block?

 

all hoses accounted for.

 

Old or new thermostat?

 

do you have AC? How many fans are you running? What is the typical ambient temperature where you live?

 

have ac. overheats whether its on or not. new oem thermo. one pulling on half rad. today temp is 77. yesterday was mid 80's. doesn't overheat on cool days.

 

Hows the duct work going to the RAD. Thats biggest probs is the rads get no air flow

 

Tell us how you go about bleading your system. I normally take the overflow hose off the tank and put it into a bucket. Then I let the car run WITH THE HEAT ON for about 30min. The rad fan should come on at least 4 times during that period. Keeping filling up the water as necessary. Then I drive the car for a bit and run it till the stat opens 2 more times.

Even after 20-30 min I usually see a few bubbles every time the stat opens. Most overheating issues I see are because of air in the system.

 

ok, i know its not anything to do with air flow from to the rad, cuz it cools down at idle.

i bleed the system by leaving the cap off until it stops burping, then i top it off, close the cap and open the bleeder. i just leave it open until nothing comes out. i can leave it at idle for hours and it won't heat up.

after bleeding it, i drove it. about 10 mins in on the highway, it started up slowly to about 3/4 and stays there. when i came to the light it started cooling down. i drove it back in, let it cool down. opened the cap and still full. opened the bleeder and nothing.

today, i took it to my shop. (not the one that built the motor) he tried to bleed it, but said there was no air. put a sniffer to it to check for hc's. nada. i'm about to just replace the water pump, because thats the only thing that i haven't replaced myself.

i had the motor built last yr in the winter. i've dealt with overheating last summer but it seems fine during winter. They (wont' name names) supposedly replaced the pump last year when the motor was built. although water seems to move through fine. maybe somehow its just not flowing enough under load.

 

AAARRRRGGGHHH!!!! NOT THE WATER PUMP!!! HELP ME!!!!

 

The fan does come on right? So it does not get up to normal temp at idle or it does not over heat at idle?

 

doesn't overheat at idle. only after about 10 mins highway. city goes up a lil, but not 3/4 like on highways.

 

It sounds to me like you might have an airflow and or heat soak problem. Normally cars over heat when there in city or stop and go, yours is the other way around. So load is clearly an issue here.

-Where is your dump tube routed? Can you snap a pic of the bay for us?
-Have you checked for an exhaust leak? Running a gasket on either sides of the turbine? See any carbon buildup?
-What fan are you running?
-Single or dual core rad? Stock or aftermarket?
-What intercooler do you have? Size? Bar and plate?
-Is the stock lower shield still on the car (the black thing)?
-Do you have any other temp gauges?

 

have you tried an aftermarket oil cooler?

 

You have an airflow problem....

 

try and replace your rad, i had similar problems. it turned out to be my rad.

 

Have u tryed removing the t-stat???? Mine runs okay with no t-stat......besides turbo car puts out lots of heat anyhow so having no restrictions in water flow will actually be better I think..............

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B20luda &raquo;</TD></TR><TR><TD CLASS="quote">You have an airflow problem.... </TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mighty137 &raquo;</TD></TR><TR><TD CLASS="quote">besides turbo car puts out lots of heat anyhow so having no restrictions in water flow will actually be better I think</TD></TR></TABLE>

No, it's not. You need to run a thermostat on any street car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote">It sounds to me like you might have an airflow and or heat soak problem. Normally cars over heat when there in city or stop and go, yours is the other way around. So load is clearly an issue here.

-Where is your dump tube routed? Can you snap a pic of the bay for us?
-Have you checked for an exhaust leak? Running a gasket on either sides of the turbine? See any carbon buildup?
-What fan are you running?
-Single or dual core rad? Stock or aftermarket?
-What intercooler do you have? Size? Bar and plate?
-Is the stock lower shield still on the car (the black thing)?
-Do you have any other temp gauges?</TD></TR></TABLE>

dump tube is open and points down in front of oil pan. it overheats even if i don't boost - wg never opens up...
no exhause leaks that i can see. no build up anywhere
using a spal 1250 cfm 13" puller. had a slim fan from ht. may try a flexalite w/ shroud.
using a mishi rad. had this in there before. http://completeradiators.com/s...ators
thought maybe turbo was heatsoaking the rad, so i got a half to move it away.
using greddy 24 ic
no shield
no other temp gauges, but had it hooked up to scan to watch temps. so not a bad gauge.
here's a couple pics

 

is the fan pulling air in? or blowing out?

 

Well the air should be getting past the type 24, it's tube and fin and allows allot of air to pass. Def make sure you fan is pulling and not pushing if it's on the back side! Next step would be a new fan and or rad if it were me...

What kind of temps were you reading on other gauge? You only got water temp I take it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote"> Def make sure you fan is pulling and not pushing if it's on the back side! .</TD></TR></TABLE>

 

https://honda-tech.com/zerothread/2055280