Ive changed everything, and still overheats well I noticed under the cap a stream of antifreeze. Well I know I must fix this but is that causing my overheating also? Goes up to the redline.

 

Under what cap?
the oil filler cap? the radiator cap?
Please be a little more clear as to what you want to say.

 

The backup tank cap, will this cause to overheat, a leak?

 

When you say," Changed everything?????" What is everything?????

 

Thermo, cap, waterpump, only thing is the radiator leaking but didnt think it leaking could cause overheating. I tried fixing the leak and it sprung again today but keeps overheating.

 

When you changed everything, did you bleed the system?
the leaking from the overflow tank is more a result of the overheating not the cause. Air bubles in the system will cause serious overheating problems.

Just read your previous post. A leaking radiator will cause overheating, when the system is under pressure it can go to a much higher temp without boiling.

Good luck.

 

yes but by bleeding isnt it coming right back in from the radiator being cracked?

 

Can a crack in the plastic on the radiator cause it to overheat?

 

Any Time You Have A Leak That You Are Leaking Coolant Theres A Darn Good Chance Your Gonna Over Heat. Might I Recoment Replacing The Radiater The Refilling The System Making Sure You Have All Of The Air Out. Also Might Check Your Fuses, And Make Sure Your Fans Are Operating Correctly
Good Luck To You

 

I would say yes, although I am not 100% sure and would wait for a few other people’s opinion before I did anything. I derived this answer from using a common chemistry principle called the idea gas law. The basic idea of the law is the when pressure or volume increases so does temperature, or vise versa. In the LT1 engine it uses a closed-pressurized cooling system. So what happen normally is that as the engine temperature increases it also increases the tempature of the coolant, which then is related to the pressure/volume of the system. This leads to the pressure increasing to make up for the increase in temperature to balance the equation. The pressure will increase instead of the volume because you can’t compress fluid, although you can compress air, the reason for bleeding the system. So as the pressure and temperature increases along with the pressure it also increases the boiling point of the coolant.

So what I would say is happening in your car is that the crack in the radiator is allowing the pressure to escape the system as the system heats up which then affects the boil point of the coolant. Then the coolant flows into your overflow tank and allows a bunch of air bubbles to travel around in your cooling system to make up for the voids the coolant left behind and air is a very poor conductor of heat.

This might not even been whats really happening but from my interruption of a few physics and chemistry laws that is what I think is going on. So don't take my opinion to the bank.

 

In Theory I Guess That Could Be Right But It Could Also Be That How Ever Many Times The Motor Has Been Over Heated That It Has Blown A Head Gasket Causing Compression Or Even Exaust Gases In To The Radiater Causing The Boil In To The Overflow This Causing Not Enough Coolant In The System To Maintain Adequate Cooling Temperature.

 

I am not bashing you, but you do realize that the first letter of every word doesnt have to be capitalized, right?

Just seems like a waste of time to hit the shift button that often.

 

Put in a NEW radiator, properly bleed the system, and then see if the problem persists. There is absolutely no way to troubleshoot this unless all the cooling system components are in good shape. Any time coolant leaks out air is going in. These cars seem to be very sensitive to air in the cooling system so you need to make absolutely sure the system is full/bled/sealed. If it's overheated a few times you could have a blown head gasket or other problems. Fix the radiator before you go any further.

 

I noticed the same thing in a previous post and I knew something looked weird I even asked why he did it. Not being an *** or anything though. Just curious.

 

lol thanks never really payed any attention to that keep that in mind though thanks