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Coolant flowing out and into the overflow container why?

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haurp00ned

Joined: Sat Sep 03, 2011 10:12 pm
Posts: 161
Location: coolum beach

Posted: Sat Apr 28, 2012 5:22 pm

hi all, just wondering this has been happening alot, when driving for like 20mins in my 92 sierra all the coolant in the radiator flows into the overflow bottle and then all spills outta the overflow bottle, and all the coolant in the radiator what is left is all foaming. was just wondering if anyone knew why this would be happening? any help would be great cheers.

JrZook

Joined: Tue Aug 08, 2006 11:30 pm
Posts: 5517
Location: Holland Park
Vehicle: Awesome!!

Posted: Sat Apr 28, 2012 5:25 pm

Sounds like the cylinders are pressuring the cooling system. Could be a headgasket

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Stevo87

Joined: Thu Mar 29, 2012 4:21 pm
Posts: 106
Location: Melb west side
Vehicle: Suzuki Jimny

Posted: Sat Apr 28, 2012 5:28 pm

Could be a faulty radiator cap

want33s

az supporter

Joined: Fri Nov 16, 2007 10:30 pm
Posts: 8134
Location: Sunshine Coast Qld

Posted: Sat Apr 28, 2012 7:42 pm

Head or head gasket.

Daves4wd

az supporter

Joined: Fri Aug 26, 2011 3:17 pm
Posts: 1286
Location: Melbourne
Vehicle: Swb Sierra twin lock 32s 6.5s

Posted: Sat Apr 28, 2012 8:27 pm

I'd be putting my money on a head gasket or head it's happend in my other car witch was a rotary and it was caused by a corroded housing different engine but same thing pretty much applys

haurp00ned

Joined: Sat Sep 03, 2011 10:12 pm
Posts: 161
Location: coolum beach

Posted: Sun Apr 29, 2012 11:04 am

i have replaced the radiator cap

jimbo_jones

az supporter

Joined: Sat Jul 19, 2008 11:30 pm
Posts: 4361
Location: gong
Vehicle: 2015 Jimny, LJ50, Maruti

Posted: Sun Apr 29, 2012 12:08 pm

caps not the problem you ether have a cracked head or a blown head gasket

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zukenutter

az supporter

Joined: Sun Feb 08, 2009 10:30 pm
Posts: 9045
Location: Brisneyland
Vehicle: 2006 Jimny JLX

Posted: Sun Apr 29, 2012 1:09 pm

haurp00ned wrote:

i have replaced the radiator cap

Did the problem start after doing this? Is it a genuine cap?

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haurp00ned

Joined: Sat Sep 03, 2011 10:12 pm
Posts: 161
Location: coolum beach

Posted: Mon Apr 30, 2012 7:32 am

no the problem started before changing the cap

Gwagensteve

Joined: Thu Feb 26, 2009 10:30 pm
Posts: 13008
Location: Melbourne

Posted: Mon Apr 30, 2012 2:08 pm

Xlots it's a head gasket.

Overheated it?

Steve.

d1mitch

Joined: Fri Feb 03, 2012 1:35 pm
Posts: 58
Vehicle: multiple R32's, wtd sierra

Posted: Mon Apr 30, 2012 3:06 pm

as all the above. 99.9999999% chance its the headgasket.
what colour is the radiator fluid? is there any milky-ness in there?
is there continuous small bubles coming up in the fluid when you have bled the system?

stocker

Joined: Wed Dec 08, 2010 7:16 am
Posts: 941
Location: Shidoni!

Posted: Mon Apr 30, 2012 5:04 pm

you may not get a colour change in the coolant if its just dropped the gasket between the cylinder and water gallery.

Yay for head gaskets, Get it compression tested if you still don't think its a head gasket. then we can say "theres your sign"

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