My BJ60 keeps throwing up all it's antifreeze...

Red Pony · 06-27-08, 09:04 AM

Wondering if anyone has any suggestions why my BJ60 sends all it's antifreeze into the overflow and beyond after it warms up. She has a new thermostat but still does it. I love my car but know very little about what makes it go. Thanks!

D'Animal · 06-27-08, 09:17 AM

Welcome to MUD!

Turn all of you heaters on full blast the next time you add fluid. You may just have air in the system and the heater cores are part of the system.

george_tlc · 06-27-08, 09:27 AM

Quote:

Originally Posted by Red Pony

Wondering if anyone has any suggestions why my BJ60 sends all it's antifreeze into the overflow and beyond after it warms up. She has a new thermostat but still does it. I love my car but know very little about what makes it go. Thanks!

"still does it"...

I assume that means it was doing this before you replaced the thermostat etc?

I had a diesel that would spew coolant out the overflow once warmed up. Turned out to be a cracked head - hope that's not the case for yours

cheers,
george.

lehiguy · 06-27-08, 12:06 PM

Have there been any other recent repairs? I had a friend go through this. He had rebuilt the engine and the after-market head gasket was incorrect; holes in the wrong places, no coolant flow. That's not the only time I've seen that.

FJn00b · 06-27-08, 12:29 PM

Crack head (most likely)
Broken internal water pump shaft ( check the heater after 15 min. if it blows warm air then it is not water pump)
Bad radiator

Red Pony · 06-27-08, 01:27 PM

I heard that if it was the head was cracked the antifreeze would be mucked up with oil that had leached, does that sound right? The antifreeze is perfectly clean when it comes out. The only repair I have had done recently with the cooling system was the thermostat.

mainlander · 06-27-08, 01:52 PM

You sure the t-stat is opening?

Might want to post this in the diesel section, many of the diesels folks may not look here very offten.

Red Pony · 06-27-08, 02:23 PM

i had the thermostat replaced when it first started doing it, the shop was pretty sketchy though and the new thermostat doesn't open until the heat gage hits the bottom of the overheating section.

Radd Cruisers · 06-27-08, 02:36 PM

Note that the FJ and BJ thermostats are NOT interchangeable - a common mis-installation.

Check all the basics, then check for pressure building up in the cooling system while the engine is cold or hot - use a pressure gauge/cooling system pressure tester (looking for pressure that is not related to water temperature/thermal expansion of coolant).

Common cause: head gasket or cracked head.

NOTE: make sure you have NO air in your cooling system.

george_tlc · 06-27-08, 05:54 PM

The diesel that I had with a cracked head ran perfect till it warmed up, then the high compression of the diesel with the hot head would push exhaust into the coolant. So, no oil/coolant mix in either the sump or coming out the overflow - so seeing 'muck' is not necessary while still having a cracked head.

New head (and all it entails) took care of the problem.

cheers,
george.

06-27-08, 09:04 AM	#1
Red Pony IH8MUD Rookie Join Date: Jun 2008 Posts: 3	My BJ60 keeps throwing up all it's antifreeze... Wondering if anyone has any suggestions why my BJ60 sends all it's antifreeze into the overflow and beyond after it warms up. She has a new thermostat but still does it. I love my car but know very little about what makes it go. Thanks!

06-27-08, 09:17 AM	#2
D'Animal Beagles Rule! Join Date: Mar 2006 Location: Central California TLCA# 17104 Posts: 10,078	Welcome to MUD! Turn all of you heaters on full blast the next time you add fluid. You may just have air in the system and the heater cores are part of the system. __________________ Cruiser Dan at American Toyota Phone is 1-800-432-6668 ext. 8 (I am not cruiser Dan)

06-27-08, 12:06 PM	#4
lehiguy IH8MUD Regular Join Date: Mar 2008 Posts: 483	What else? Have there been any other recent repairs? I had a friend go through this. He had rebuilt the engine and the after-market head gasket was incorrect; holes in the wrong places, no coolant flow. That's not the only time I've seen that. __________________ 1985 FJ60, 300HP SBC, NV4500, NP241, 14-bolt semi floater, 4.56 gears, four wheel disk brakes, 35" BFGs, 350,000 happy miles and still going.

06-27-08, 01:27 PM	#6
Red Pony IH8MUD Rookie Join Date: Jun 2008 Posts: 3	thanks! fingers crossed it is not the head! I heard that if it was the head was cracked the antifreeze would be mucked up with oil that had leached, does that sound right? The antifreeze is perfectly clean when it comes out. The only repair I have had done recently with the cooling system was the thermostat.

06-27-08, 01:52 PM	#7
mainlander IH8MUD Regular Join Date: Mar 2006 Location: Abbotsford, BC Posts: 291	You sure the t-stat is opening? Might want to post this in the diesel section, many of the diesels folks may not look here very offten. __________________ 83 BJ60, 347K km's, Mitsu TD04 Turbo, Custom 2.5" SS Exhaust, OME 2.5 lift, 4x7 Home built roof rack, 80 series rims 265 BFG AT ko's, frame swap coming soon... 04' VW Golf TDI, 172K km's

06-27-08, 12:29 PM	#5
FJn00b IH8MUD Rookie Join Date: Apr 2008 Posts: 55	Crack head (most likely) Broken internal water pump shaft ( check the heater after 15 min. if it blows warm air then it is not water pump) Bad radiator

06-27-08, 02:23 PM	#8
Red Pony IH8MUD Rookie Join Date: Jun 2008 Posts: 3	hey we have twins! i had the thermostat replaced when it first started doing it, the shop was pretty sketchy though and the new thermostat doesn't open until the heat gage hits the bottom of the overheating section.

06-27-08, 02:36 PM	#9
Radd Cruisers IH8MUD Lifer Join Date: Sep 2002 Location: Vancouver Island BC Canada Posts: 3,669	Note that the FJ and BJ thermostats are NOT interchangeable - a common mis-installation. Check all the basics, then check for pressure building up in the cooling system while the engine is cold or hot - use a pressure gauge/cooling system pressure tester (looking for pressure that is not related to water temperature/thermal expansion of coolant). Common cause: head gasket or cracked head. NOTE: make sure you have NO air in your cooling system. __________________ Check out our new location in Duncan, BC www.raddcruisers.ca --> 60 Series Cable Lockers available - 4.11s or 3.70s - all hardware included --> 12HT & H55F combos available - complete & running Limited Quantities - Deposit or Full Payment Required to hold your order while they ship

06-27-08, 05:54 PM	#10
george_tlc IH8MUD Regular Join Date: Sep 2003 Location: Sunnyvale, CA TLCA# 8068 Posts: 217	The diesel that I had with a cracked head ran perfect till it warmed up, then the high compression of the diesel with the hot head would push exhaust into the coolant. So, no oil/coolant mix in either the sump or coming out the overflow - so seeing 'muck' is not necessary while still having a cracked head. New head (and all it entails) took care of the problem. cheers, george. __________________ where ever you go, there you are.... '97 S/C White CE, locked^3, sliders,arb,kaymar, m12000,dual batteries, LEDs, etc..... ki6ibx http://www.george4wd.taskled.com

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