My 4 runner was leaking oil badly from the drivers side of the engine since i've owned it. I finally took off skid plate and looked in FSM and realized that someone had removed the oil cooler that was supposed to be mounted behind the oil filter, that same genius tried to seal it with a circular piece of metal with a central bolt, however that is not holding up and i would really like to get a cooler back in there (hopefully I can find a used unit from a junk yard). While searching for the fitting that is supposed to feed from the block to the oil cooler i realized that it was either broken off or replaced with a bolt. Now im not sure which location it is supposed to be in since there are two bolts there now that look like they could be fill bolts for the old fitting. I really don't like that the coolant that should be flowing here is blocked off and just sitting in the cyl. head. I would either like to bypass the cooler and run hose from a new block coolant fitting to the water pump and get an aftermarket cooler unit(for cost control) or get an oe cooler and get it back to factory form(choice a). I really just want the coolant to flow properly again. Does anybody have a picture or possibly a part number for the fitting in the block that allows coolant to flow to the oil cooler? i need to know where it should go and fsm pics arent helping.

 

Union part#90404-53066






That picture is for 2wd but the block coolant connection is the same. I really wouldn't worry about coolant flow problems without a cooler. That connection on the block is actually a block drain. Most of the coolers out there are blocked by rust sediments without the owners even knowing.

 

ok glad to hear that its just a drain that means the easier cheaper option is the one im going for, thanks

 

ok so is the 4x4 backwards from the 2wd cause mine im rebuilding the oil filter and the cooler is switched around

 

Yes, they are switched around for the 4X4.

 

Many 3VZ-Es came from the factory w/o oil coolers. So I HIGHLY doubt that it's been removed. FYI, that circular piece of metal with the central bolt is stock. See pics below.

BTW, you'd need the other style water pump too if you wanted to run the oil cooler. But bypassing it like you're saying would be COMPLETELY useless(wouldn't help cool anything, might even hinder coolant flow).

What you really wanted was to stop the oil leak though right? The o-ring is part # 90301-68005, and the gasket for the bolt is part # 90430-20012. And for both of those you'll be expecting to spend ~$5.

So who's the genius now?

No, that one IS NOT a block drain. The block drain is the bolt next to it. Mine has a hollow hex plug(Taper Screw Plug part# 90344-53015) threaded into the hole where that union would be, since it wasn't equipped with the oil cooler from the factory.

 

where does the line run to from the cooler on a 4x4

 

came from the fatory that way

 

could you just put on a second filter

 

From water pump, to oil cooler, to block.

 

Yes, you would have to go get a threaded adapter for the filter to screw onto, but it can be done. Recommend a bypass type filter for this application.

 

does anyone have the part numbers for the cap and the bolt in this picture?

 

MudHippy wrote;
What you really wanted was to stop the oil leak though right? The o-ring is part # 90301-68005, and the gasket for the bolt is part # 90430-20012. And for both of those you'll be expecting to spend ~$5.


Taper Screw Plug part# 90344-53015


a thread from Tofer;

https://www.yotatech.com/forums/f116...talled-215913/

 

That's the o-ring for the cap and the gasket for the bolt, and the plug to replace the coolant union. But I'm needing the part numbers for the cap and the bolt themselves.

 

The cap(Oil Hole Cover Plate) is 11494-65010 and the bolt(Union Bolt) is 90401-19002.