1994 Toyota Pickup Need Help Identifying Engine Part

Thank you very much for the name! We have been trying hard to find out. Is it common to leak here? Is the hole supossed to be there? I have a couple more pics if you need them.
Thank you
Vic

I may not have been clear as to the location of this fitting. It is under and attached to the thermostat housing. It has a hose attached to it, so it cannot be turned/tightened. If a bleeder valve is in this location it may have came out of the hole that is now leaking. The hose attached I believe is a bleeder hose and the other end attaches to the water pump. At the other end there is another "t" with a hose that seems to go to the intake manifold.

Need more info or photos let me know. Thanks ... Vickie

Hi,
Yes it is difficult to explain. especially since I can not see it. I stick my camera under the manifold and shoot blind. I am not even sure what I am shooting, but believe this fitting is screwed into the thermostat housing. It has a nipple on the side with this hole adjacent to it. I marked the location of the hose in one photo ---you can see just a little of the nipple protruding on the left of the fitting. The connection is behind the hose that is blocking the view (in the foreground). I can not turn this fitting without removing the bypass hose. We replaced this hose thinking it was where the leak was only to find the hole near by. If this is the location of the bleeder was the bleeder valve in this hole?...Thanks again for all your patience and help,
Vickiie

Wow! I appreciate all you have done researching this problem. We took the camera with the photos to a parts store and three of the men there had no idea of what it was. They have the bypass hose pictured on their computer, but nothing for the surrounding area. They even opened up the Chiltons manual for that truck and found no referenced to it or photos of that area. We have a different brand manual and can not find anything it it either. I tried calling our local (20 miles away) Toyota dealer all day, but they must be closed due to the bad weather we are having here in Missouri. They may tell me what it is if they can sell me a part. I do not know anyone in the service department to ask for advice. I think your advice about removing it is the next step. Then I can take it to Toyota for a replacement or fix and answers to what it is/why there is a hole in it. One mechanic we talked to about it thinks it may just be a weak point that failed due to corrosion (15 years of use). I will be interested in any additional information you can come up with and will let you know if I find out anything tomorrow. It has been a little cold for "Shade Tree Mechanics" the last few days and we have another vehicle, so it has been easy to procrastinate. Thanks again, Vickie

Hey thanks for all the help. I took the pics to our Toyota dealer and they found the part. It is an elbow. The hole is not supossed to be there. It is interesting though, I bought the truck used in 1994 and it has always used water/anti-freeze. I never could find where it was going it just didappeared, there was never a puddle under the truck. I m thinking this must be where I have been losing i The hole has just worn into the metal over time and what is weird is there is another hole identical to it worn through on the other side. There is staill a paper thin piece of metal left over the hole so at this point coolant was leaking out both holes. I got a picture of the elbow out I tried getting a picture of the "new hole" but it did not come out.

Thanks again for your help!
Vickie