jbyrdman

So...my 91 4runner WITH 3VZE started leaking radiator fluid today, drove it to work and there was no fluid in the driveway, parked it at work, then went out about an hour later still no fluid, then a few hours later went to leave and there was a large puddle of fluid under the truck. It doesn't leak when it's running. Any ideas as to what it may be? Point me in a direction, I'm tired and don't have time to spend a few days trying to figure it out. I've changed the timing belts, head gaskets, and water pump in the last year. HELP!!!

EDIT: MOD'S WILL YOU CHANGE THE NAME OF THE THREAD TO 1991 3VZE ANTIFREEZE LEAKING WHEN ENGINE'S OFF

buckz6319

well it could be coming from the #1 bypass hard water pipe at the rear of the engine,it has a rubber hose on the end of it located on the passenger side.some times the hose is ok but the metal tube that runs back under the intake to the and I believe it is between the block and intake will rust out like mine did and what a time consuming part to get to and replace
http://www.ncttora.com/fsm/1990-1995...neme/cylin.pdf

jbyrdman

Just got around to looking at this....the leak is coming from the drivers side towards the front of the engine...if not the fromt...hard to tell because of the belts/pulleys, I'm going to pull them off today and see....any suggestions?

Tubbyfatty

Mine was leaking in 3 spots. The water neck on the lower intake plenum, #3 bypass hose, and a heater core hose right next to the #3 hose. The heater core hose had holes all along the bottom of it, where it connects to the motor, my leak was so bad id have to drive with the window down, but id still get a headache from the smell.

Heres my thread. https://www.yotatech.com/forums/f116...ak-3vz-194240/

Id start by lookin at the water neck/ idler #2 to see if its leaking there. That leak caused a puddle to form under the front part of the motor, it would drip off the steering stabilazer.

Also, check your lower rad hose, its cheap and it doesnt require alot of work. squeeze it and make sure you dont see any pin holes in it.

jbyrdman

OK, without taking the radiator and fan/belts off it looks like it's coming one of these two spots...one is where the bottom rad. hose enters the block...the other..I'm not sure. Any ideas?

camo31_10.50

wow...i sure am glad that my 3vz don't have no leakes....you're motor looks NASTY LOL mines clean as a whistle!..

your leak is most likely coming from the lower radiator hose..and not from what looks to be the oil pump LOL!

jbyrdman

squeezed it and didn't see any leaks...it doesn't leak why it's running...and doesnt burn antifreeze....when I turn it off it leaks pretty steady ...about a 4-6" puddle in about a minute or two then slows/stops almost all together. That's what's throwing me.....yeah I know the engines nasty haha got an oil leak I haven't taken care of....

jbyrdman

OK, here's where the leak is .... about 99% sure...started it and had someone shut it off while i watched...Leaking all around this bolt head....

buckz6319

I'm not sure why that bolt head would be leaking oil?.....is that a bolt for the oil pump housing?

stormin94

Mine has done something similar to that, but I tracked it down to the water pump. I'd park after driving a little ways, and sometimes it would be streaming water out of the water pump, then it would stop after about 1 minute or 2.

jbyrdman

Not leaking oil...it's leaking anti-freeze/coolant I'm going to put up a video on shortly of the leak

livetoride88

in the pic with the two red arrows the arrow to the left is right where the weep hole i the water pump is so u may need another new water pump

jbyrdman

http://www.youtube.com/watch?v=NEVnQKECrTM#t=0m11s

Zinek

Just did my water pump about two weeks ago, It was leaking in the same exact location yours is. It would only leak during warmups and cooldowns, usually late cooldowns. In my opinion I'm thinking waterpump.