Is it bad if the coolant is expanding near the top of the expansion reservoir, and taking a while to go back. Also there are many black specs in the coolant. Ive had the car off for a couple hours now and the coolant is still near the top but the car has not overheated.

 

your coolant should stay within a normal range. does this happen mostly after you've been in boost a few times? as for the black specs, check your oil for coolant. if it doesn't look normal or kinda milky, you might have a headgasket issue

 

have you ever changed your coolant?

Not good to have anything in your coolant. Your temp gauge is reading normal though?

Stock radiator or aftermarket? How does the coolant smell?

 

actally i over revved the car in second gear in the middle of a wheel spin shortly after this original post. The rpms jumped to redline and i held it there a little too long. Not used to the new hp. Well regret it really bad. It over heated as soon as i shifted into third, so im pretty sure i blew a head gasket. very dissapointed seeing how i just got the car back from the shop after a looong wait. It just dosent seem like the head gasket would blow from 1 or 2 over revvs though.

 

Theres no problem with running your car to redline, I've done it countless times over the last 3 years while being boosted. These cars can't over rev past the rev limiter. It is there for a reason, and so you can't damage the engine that way. Unless you mis shifted and caused an over rev that way, that would cause some damage.

I have black dots in my coolant too, have had them for many months and I'm not worrying about them right now. My oil is not milky and everything is runs good, so I have no idea what it is. I highly doubt you have a head gasket issue unless your oil looks milky. How is your stock gauge? Does it rise? Provide more info...

 

The black specs can be from exhaust getting into the coolant. Have you driven it again since and has it overheated again?

 

Could you please explain how black dots can get into coolant from the exhaust? I'm not sarcastically asking, I'm seriously asking because I'd like to know how since I have black specs.

 

the only two ways i know for black specs to get into your coolant are from 1) a worn out radiator hose breaking up inside or 2) a bad headgasket. i'd also like to know about the exhaust thing too since i'm OCD about checking everything nowadays.

 

I know its none of those things, since there are no other symptoms of either. So I'm curious to know what caused it, since there are no other symptoms.

 

Could be from using mineralized water (not distilled), dirt entering via the overflow tank...

Head gasket is normally the issue. It comes from the actual exhaust gases being pushed into the coolant channels via the headgasket under high pressure. This is also generally associated with air bubbles which can cause hotspots and can lead to further head gasket issues/failure. When this is the case you often see the white smoke from the tail pipe on start up - from coolant leaking out to the exhaust side when it cools down and burning off on start up. At normal operation it would burn off.

If head gasket failure does happen and temp rises be very careful. The heads are aluminum and if they overheat too much you will warp the heads. Downside of aluminum.

 

My car doesn't do anything you mentioned, but I've had my temps up high (260+) multiple times on the track..hmm I wondering if I've warped my heads at all.

 

everytime i drive the car in boost it overheats. (temp guage rises and coolant spews from expansion resevoir) I havnt driven it for a couple weeks or since the last time i posted. The shop said i probably blew a head gasket and its going to be 1800 to fix. IT just dosent make since to me because the car was at 7000 rpms for maybe 2.5 or 3 seconds before i shifted. I was spinning tires so thats why it was redlining.

 

It still dosent seem like it would blow head gasket that easily though.

 

That doesn't seem right.
Your car shouldn't be overheating that easily.
I run the Vortech with the 3.12 pulley and i can boost all day long and my coolant is only running around 200degF tops.

 

yea but i over revved the engine right above 7000 rpms for about 3 seconds while spinning tires in second gear then when i shifted to third it just bogged down and the temp guage went all the way to the top. I immedietly turned the car off and looked and it was leaking coolent.