What’s this hole for

[stu’s68furyiiirat]

What’s this bolt on block for its a 318 it’s circled in black I’m just curious what it is and what’s it’s for

 

[rags]

block drain.

 

[HOT FURY]

should be one on each side and originally came with a petcock valve rather than a pipe plug I believe

 

[CBODY67]

As mentiond, the block drain plug. IF you take it out, be prepared for a gush of rusty liquid after you open up the hole.

 

[Boydsdodge]

should be one on each side and originally came with a petcock valve rather than a pipe plug I believe

I have never seen a factory pet cock valve, after install yes but not from Ma Mopar.

 

[Big_John]

As mentiond, the block drain plug. IF you take it out, be prepared for a gush of rusty liquid after you open up the hole.

Best to put your face right up there for the full effect.. Although you often have to stick a screwdriver in there to break the crust that has formed.

I love the taste of anti-freeze in the morning... Tastes like ... Victory...

 

[CBODY67]

"Victory" as "de feet" get wet?

 

[Big_John]

"Victory" as "de feet" get wet?

If you do it right, everything gets wet.

 

[stu’s68furyiiirat]

Thank you all for the info I’ll flush it out with water here soon to see all the rust lmao I been wanting to to this for awhile

 

[413]

If that engine is out of the car then remove all core plugs and clean out the water passages. usually the crud will not all come out by just removing that screw in plug.

3 on each side.
2 in the back bellhousing area
2 on the front of the block.

 

[stu’s68furyiiirat]

If that engine is out of,the car then remove all core plugs and clean out the water passages. usually the crud will not all come out by just removing that plug.

3 on each side.
2 in the back bellhousing area
2 on the front of the block.

It’s still in the car

 

[Just Carbs]

Yep, you got to remove the plugs to get all the water out after you flush it to put in the "distilled" water with the antifreeze.

 

[rags]

It’s still in the car

is it your intent to change those rotten frost plugs?

2 in the back bellhousing area

of the ones i've done, these are the ones that usually rot first. and for some reason, the mother-f'kers on the backs of the cylinder heads.

 

[CBODY67]

Using a caustic power with water solution to "flush" the system can also remove scale which has attached to the backside of the plugs. With that scale gone, the thinner metal of the plugs is more likely to seep and leak. Just replace them all and be done with it. IF the back ones are leaking. might have to pull the transmission rather than pulling the motor?

A messy job, but once done correctly, no more worries for quite some time, using a quality coolant.

CBODY67

 

[rags]

changed the plugs in my '65 with steelies. they were rotten again two years later. replaced again with brass plugs.