First things first
New Street ported motor
New AST
Getting my readings from an digital water temp gauge thats tapped into the water pump housing
This following is what happens at idle

Take cap off filler neck (not the AST)

Turn car on...after a minute fluid wants to come up and out instead of going into the engine..I then wrap a rag around it to catch extra water..turn on my heater and start to burp..nothing.....fluid is still trying to escape from the top....

If I leave the cap on and start the car..once the temp reaches about 190 fluid/steam starts to come out the top of the filler neck (not the ast)..panic...and turn car off....

I am not running coolant through my throttle body im bypassing this....If i did take this hose off coolant just comes out and I see no air in it (only tried this for 5 seconds coolant went everywheres)...

Ive been burping the car for the past say 5-6 days..Im clueless....

 

umm, maybe it's already burped well enough.

 

so is almost everyone on this forum
burping the coolant is not hard read the manual you're trying too hard

 

bump....

 

wow burping for 5-6 days?! to me it sounds like your fluids are ok. if your that paranoid just top it off at the filler neck every morning.

 

well i drained all the fluid today from both the radiator and the block....
Filled everything back up with the TB hose off...once water started coming out of the TB hose i burped the car maybe 30 somehwhat times.....like have an AST tanks worth...bolted everything back up and f&^* s**#....still same deal

after like 20 seconds fluid want to come out the filler neck instead of going into the engine....

help please...

 

Sounds normal to me. The cap is there to make sure it DOESN'T go out the neck. The sytem expands pretty quickly; It wouldn't surprise me to see it going up the neck that fast.

 

hmmmm...maybe i got the wrong cap....
it has a spring on it...

 

What is the pressure rating of your cap?

-s-

 

13lbs

 

Your AST cap should be 13lbs, your filler neck cap shouldn't have a spring.

 

its not a stock one...i lost it durring my whole tear down this winter and i bought one at autozone...

what does that affect??

 

That'll be fine, as long as:
Filler Neck Cap = No Spring
AST Cap = 13lbs Cap

 

well it has a spring..its just not the stock one

 

Make sure you're using the bleeder valve on the top of the water pump...I just burped my car two nights ago before I went racing.

Craig

 

what bleeder valve do you speak of whip??

 

It's right on top of the water pump, right by the radiator cap...I think it's something like an 8mm alan wrench. If you want, I can take a pic.

 

Umm...what? No.

 

yeah i thought that was just a spot to tap in.......

 

Hm...when I used it, I bled the car in like 10-15 min...
That's what my buddy used, so I don't know. He's better with cooling systems than I am.

 

if you have a spring cap on the filler neck that is the problem

 

The allen plugs are covering the drilled passages used to route the air buildup to the AST. It goes back at an angle, then down, then forward, and they needed to drill those into the casting. The plugs are to plug it, obviously.

Anecdotally, when I got my car, the plug just behind the filler neck opening had been removed and then put back by a previous mechanic. I eventually saw that it was letting off a bit of steam, i.e. leaking system pressure. I replaced the engine six months later. Can you say overheat? It had occured before I bought it, and the seller didn't tell me. So if you are going to pull that plug to burp, PUT TEFLON TAPE on the threads when you put it back!!!

Lastly, just to be totally clear, the AST takes a 13 lb "pressure" cap (i.e. WITH the spring) as per the cooling system recall. Originally it had 16 lb, and was causing problems. The filler neck takes a flat cap (i.e. no spring), though a pressure cap will work provided it seals correctly.

 

Oh. Okay, sorry for the confusion...

 

ok ill get one without a spring

 

get an OEM one.