Mystery bolt hole leaking coolant

[jasonv]

Hi,

I was filling up my newly rebuilt engine with hopes of firing it up today but have a coolant issue. This hole on the side of the engine just below the #1 spark plug is no plugged. Is there supposed to be something there? I don't have any leftover parks not sure if it just needs a plug or if something was supposed to bolt in there.

Jason

 

[B RON CO]

Hi, I'm not positive but it looks like it will take a 1/4 NPT pipe plug. They usually have a square head for the wrench. Good luck

 

[Hazegray]

Could have been a knock sensor. I would just use a pipe plug...

 

[Steve83]

...my newly rebuilt engine...

Is it a replacement block, or the same one that was in the truck before? Did YOU rebuild it, or did you have someone do it for you? If it was someone else; are you sure you got back the same block you sent out?

 

[jasonv]

had it rebuilt. its the same block. It would be out of 30+ years of character for the guy to swap it and not say anything.

I'm looking through the hundreds of pictures that I have and I don't have that exact shot anywhere. the old heat shroud for the air cleaner hides it!!!!

 

[savage]

What engine is it? Is that in the head or the block? My 74, 302 has a drain plug in the block, use to be a screw in plug. the engine builder put a drain plug their and one on the other side to.

 

[Rustytruck]

My stock 1974 Bronco has a socket head pipe plug in that hole.

 

[jasonv]

Thanks all. I got some plugs for them. Wish I'd seen the response about the second one before I found it the hard way. All good now. $4 and two trips to the store.

Jason