overflow tank cap?

[sleepersupra]

how does the overflow tank cap work?

cause i finished my rebuild about 400mi ago w/ a mhg and arp studs and my car seems to push the coolant out the overflow tank and i noticed today that the tank was almost empty yet it still was pushing it out. i thought it would only push it out when it got full

please any help would be great.

Mike

 

[jdub]

When you installed the MHG (what kind?) did you have both the block and head decked? What torque did you use on the ARP studs?

 

[mkIIIman089]

You could always try getting a new cap assy.

 

[sleepersupra]

When you installed the MHG (what kind?) did you have both the block and head decked? What torque did you use on the ARP studs?

yes i got both done right THIS time and i'm using a 1.5mm titan

 

[jdub]

Excellent!

Just so I got this right...your car is pushing coolant out the radiator into the tank. The tank is overflowing as a result. When it cools does it suck the coolant back into the radiator?

 

[supra90turbo]

Have you properly "burped" the system?
400 mi... sounds like you're overdue for a retorque, but that may be another story now...

jdub: Happy 666th post :evil2:

 

[jdub]

jdub: Happy 666th post :evil2:

OMG...My head isn't going to start spinning around on my shoulders is it!

LOL....:runaway:

 

[mrnickleye]

Get a new radiator cap, they're cheap. Burp the system. Do a BHG block test.

 

[Nick M]

It is supposed to go in and out. The cap is made that way. As it heats, it expands, and as it cools it contracts. That is why there is a resevoir labeld hot and cold, or low and full.

Of course, you could have problems aside.

 

[sleepersupra]

i have a new cap... a blitz 18.5lb one a did a retourge about 50mi ago and i will do one at 500mi.

yes it pushes it out when hot and sucks it in when cold.

i checked my compression and i'm sitting around 162 on all 6 cylinders

i might try and burp the system again

 

[IJ.]

SS: Make sure the Heater is on Hot when you burp it.

 

[sleepersupra]

SS: Make sure the Heater is on Hot when you burp it.

will do. will me having a bubble in teh system cause these symptoms?

 

[IJ.]

Mike: If there's Air in the system it will get local hotspots and boil the coolant as it passes creating steam and pressure and that will blow any coolant in the way into the recovery tank.

It's really important with our cars to remove as much of the air as you can.

I use a piece of small radiator hose with a big funnel jammed into the radiator neck then park the car so it's nose up in my driveway and fill it.

 

[sleepersupra]

Mike: If there's Air in the system it will get local hotspots and boil the coolant as it passes creating steam and pressure and that will blow any coolant in the way into the recovery tank.

It's really important with our cars to remove as much of the air as you can.

I use a piece of small radiator hose with a big funnel jammed into the radiator neck then park the car so it's nose up in my driveway and fill it.

ok cause when it starts to get warm ( in between half and 2/3) and i stop the car i can hear it boiling and steaming so that makes a whole lot more sense to me and i am better to relate to it.

thanks IJ

 

[sleepersupra]

ok i started trying to burp the system and out of nowhere it started to smoke like i was burning oil. not blue and not sweet smelling just white

 

[Nick M]

It's really important with our cars to remove as much of the air as you can.

:werd: