Overheating?

[GOTZOOM?]

I need some help.

It started Thursday when I lost a radiator hose, and I didn't know it at the time untill about another 5 miles when the car lost power and I heard it jingling(detonation). So I immediatly pulled over and found the problem of losing the hose. Got it towed back to my house, replaced the hose, filled it back with 50/50 coolant, and the car ran fine. Friday drove to work and home no problem. Friday night I was heading out to the racetrack which is about 45 minute drive, got there and the car was overheating(gauge was up, and the overflow tank was spewing. Went to a gas station, let it cool off, filled with water, got it back home. Thought maybe I didn't get the mixture right, so I flushed the system, filled it back up. This Morning I was supposed to drive to Alabama to pick up my daughter, and got about 30 minutes away, and I thought I would check to see if anything was boiling over, and the resevoir was filled all the way up and spewing over. The gauge doesn't register it over heating (stays right below half way). I changed the Thermostat and Radiator cap, and still everytime I drive it, it overflows the resevoir, but the gauge stays right below half. I took out the sparkplugs and no sign of water, and I checked the oil, no sign of water. WHAT GIVES!

 

[svxin]

you need a new thermostat when you over heat the go bad ive had this happen in my vw and subaru trust me it should be all thats wrong i freeked when it happend to me and thats all it was give it a shot.

 

[GOTZOOM?]

I changed the thermostat and radiator cap.

 

[svxin]

ok is the thermostat in backwards at all? i know it sounds like a dumb question but ive done it?
and also did you burp the system at all when refilling it? maybee a trapped air bubble...

 

[svxin]

and what temp does it get up to?

 

[ForceFed]

ok is the thermostat in backwards at all? i know it sounds like a dumb question but ive done it?
and also did you burp the system at all when refilling it? maybee a trapped air bubble...

I'll agree !It sounds like an air pocket to me too!
Matt

 

[GOTZOOM?]

Thermo is definitly in the right direction. Gauge goes up to just below half way, never goes up. How do I burp the system. Someone said to jack up the front of the car to let the bubbles come to the top, don't know if that worked or not.

 

[svxin]

i have a special funnal that burps out all the air on the way in. Hummmm i got mine from snapon or mac but go to pep boys advance or some autoparts store and ask them for a burper funnel its like 30 bucks but works every time how did you do it when you put your turbo on? i dont know anyother whay to burp a cooling system other than the funnal.

 

[GOTZOOM?]

When I put the turbo in I filled it the same way as this time, but had no probs.

 

[perfworks]

when the car is completely cold, fill the radiator. Run at idle 10 minutes. While the car is idling, you'll notice there is a hose that routes coolant to the throttle body, right by the coolant temp sensor. disconnect that hose for a about a minute. That will bleed the system . only when the heater and thermostat has opened fully.
when coolant starts coming out from there place the hose back and clamp it as normal. hold it at 2500 rpm for 1 minute. let off the throttle. fill the radiator completely and cap immediatly.
fill resevior half way and call it a night.

 

[GOTZOOM?]

I'll try that in the morning.

 

[HENRYMP5]

good luck with problemI think what perfwork said might do it.

 

[LinuxRacr]

when the car is completely cold, fill the radiator. Run at idle 10 minutes. While the car is idling, you'll notice there is a hose that routes coolant to the throttle body, right by the coolant temp sensor. disconnect that hose for a about a minute. That will bleed the system . only when the heater and thermostat has opened fully.
when coolant starts coming out from there place the hose back and clamp it as normal. hold it at 2500 rpm for 1 minute. let off the throttle. fill the radiator completely and cap immediatly.
fill resevior half way and call it a night.

Exactly! I did the same damn thing when I finished installing my engine back in May. I overheated, and called up Perfwerks. We did some testing. All was well. At 1st I thought it was my new Mazdaspeed lower temp thermostat that I had spent $80 on and was shipped form Japan via Corksport. The next day I tested the thermostat by placing it in a boiling pot of water. It was good. I found the proper procedures for replacing the engine's coolant in my shop manual. I found that I didn't have enough coolant in there, and had an air bubble because I didn't follow procedures:

 

[GOTZOOM?]

Well. that didn't work. Guess its going to Mazda on Monday. Maybe they can figure it out.

 

[perfworks]

Well. that didn't work. Guess its going to Mazda on Monday. Maybe they can figure it out.

hope you didnt blow a gasket

 

[GOTZOOM?]

OK, now I am noticing something else, when the engine cools and sucks all the fluid back out of the resevoir, it is leaving a black and gray looking sediment behind, like sand sized. It is on the rubber part of the radiator cap also. What could this be coming from.

 

[igdrasil]

Blown Head gasket[/]

That is exactly what happened to me 2 weeks ago on my mitsu. Same symptoms you telling

No water
Car overheated
Ping/Knock
Lost almost all tghe power
Shutdown engine, towed home
On cold, filled the radiator, closed it.
Started the car, with some mayor erratic idle
Opened the cap with the car off, started again and all the water came out with power. Piston compression was leaked thru the gasket on a coolant line on the head.


But, it might not be your case (dunno)

 

[perfworks]

OK, now I am noticing something else, when the engine cools and sucks all the fluid back out of the resevoir, it is leaving a black and gray looking sediment behind, like sand sized. It is on the rubber part of the radiator cap also. What could this be coming from.

this s*** all happened to me in the past. i can only comment from experience.
the grayish stuff might be from your radiator. i had that too when it overheated.
next logical step would be a head gasket.
i know your explaining it very well, but without looking at the vehicle i would next guess the gasket

 

[GOTZOOM?]

I always thought there would be water in the oil, cylinder or white smoke pouring out of the tailpipe. The thing is the car doesnt overheat, only when it finally loses enough fluid out of the resevoir, then it gets hot, but not overheat.

If its the head gasket, what can I expect. I am guessing remove head, replace gasket? Do I need to have the head machined?

 

[spoolinmp3]

GOTZOOM?

when the car is completely cold, fill the radiator. Run at idle 10 minutes. While the car is idling, you'll notice there is a hose that routes coolant to the throttle body, right by the coolant temp sensor. disconnect that hose for a about a minute. That will bleed the system . only when the heater and thermostat has opened fully.

Did you try this yet?
If its the gasket you may have to machine the head in some cases