Head core plugs

[RichCreations]

So, I have not found a "set" that includes all the plugs in the head, and I forgot to write down the numbers before my head went to the shop, any one know what I need?

I am talking about the ones under the exhaust, the large one on the back of the head, and the two on the ends of the log. If it matters, this is for a '69 M-code head (med-large log)

 

[BCOWANWHEELS]

theres 3 different sizes at least. they don't come in a "kit" I got mine from oriellys. I might have some extra but wont know till first of the week. mine are all brass . I had my head shot tumbled so all had to come out.

 

[Econoline]

Measure it man. It's come up recently. They are standard sizes and easy to find in brass.

 

[RichCreations]

My head is at the shop, was thinking I could pick them up while I am waiting for the head, guess not.

 

[cr_bobcat]

Rockauto used to sell a brass kit

 

[chad]

Rockauto used to sell a brass kit

reference them as "freeze Plugs"?
That may not include several in the head.

 

[wsa111]

Do you think brass freeze plugs are better than steel. Being brass they lack tension upon fit. This promotes seepage, but do they last longer due to less corrosion??
Any comments?? Since i change coolant every three years i have never had a problem with steel plugs.

 

[chad]

anecdotal evidence supports U on both points I believe Bill.
So, like many things, it's individual choice (on application - speaking automotively).

 

[RichCreations]

from my years, I have seen more steel plugs leak then brass, I always try to use brass, and seal them with Permatex Avation Sealer before installing them, and have never had one fail, YMMV...

 

[bubba22349]

I think it all depends on the type water that some areas can have, so yes if you use distilled water and change the coolest within 3 years you probally can get good service out of the steel plugs. X2 I have never had a problem with a brass freeze plug seeping and that's also the way I install them RichCreations. : personally the extra cost for some of mine was worth it since I kept them a long time. Good luck

 

[wsa111]

If you are building a marine engine brass is the one to use.
If you change antifreeze every 3 years you will never have a problem with steel plugs for street use. Aviation permatex as mentioned is also my sealer of choice.
The cam cup is exposed only to oil so why even use brass even on a marine engine.

 

[bubba22349]

Have had to change out lots of leaking steel freeze plugs over the years granted lots of people just don't maintain their cars properly. I'll be sticking with the brass for mine. X2 yep there's just no point for that particular use, so I have never used a brass freeze plug for the cam end or any of the oil passage plugs! :thumb up

 

[1hotvega]

The size for the expansion plugs is as follows:
Rear of head 1 3/4"
Side of head and intake ends: 1"
If you have a 1978 or 1980 and newer cylinder head those take a 1 1/4" plug on the ends of the intake manifold.

 

[turbo2256b]

i ALWAYS USE BRASS PLUGS

 

[chad]

Thanks, now we have them for the head.
How bout the block?

So, I have not found a "set" that includes all the plugs in the block. Any one know what is needed?
I am talking about the ones under the exhaust, down the side of the block, anywhere else on the block,

How many?
What diameter?