thermostat housing help - 79 k10
 

Hey guys I need some help here, im replacing my thermostat housing on my 79 k10.

I did some searching and did not find what I was looking for.

It has the 350 in it and right now it has one of those chrome thermostat housings on it.

I got my original replacement and it has two holes on top of it. One is threaded and the other is not.

I have seen that the EFE sensor goes in the threaded one, how about the hole that is not threaded?

Thanks for any help.

Here is what it looks like:

http://i462.photobucket.com/albums/q...psba7967f0.png

Re: thermostat housing help - 79 k10
 

I have a pressure release pin in that hole on mine. Id post a pic but the server is giving me problems.
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Re: thermostat housing help - 79 k10
 

so I replaced my thermostat housing and both holes were threaded, so i just put a plug in it. So both holes are plugged. Would still be good to know what both are for. Thanks!

Re: thermostat housing help - 79 k10
 

3 tee i think is EFE and Vac advance
2 tee is the EGR