Plugs on the back of the head

[nismo300zx1990]

Has anyone had to reseal these plugs that are on the back side the the heads? I have noticed one of them leaking oil and would like to know how to remove these and what is the best was to reseal them up. I have the cylinder head off and ready to go.

[300zxtt4life]

Are you talking about the half moon gasket? Where one side the cam position sensor goes and on the opposite side a half moon shaped rubber gasket goes, aftermarket ones are now alumium. Just use new gaskets which are sold either by themselves or in the engine rebuild kits and use some gasket sealer.

[nismo300zx1990]

No the plugs i am talking about are the big allen head ones that are on the back of the head

[300zxtt4life]

Oh those, that is the holes for the molds when they made the heads. Like the freeze plugs on the block. Usually if they start leaking from there that is not a good sign and its best to replace the head.

[nismo300zx1990]

These are new heads that I got from z1 motorsports. I had bigger cams installed and gone through :-(. There has to be a way to fix them.

[nissanfreak12]

I would contact Z1 and discuss what is going on. Im sure you can take them off, clean, reinstall with sealant. If they are like freeze plugs, they should work the same when installed or reinstalled.

[nismo300zx1990]

Yay I was thinking that also. They have a Allen type plug in it but I am not to sure the best way to take it out.

[300zxtt4life]

Try counter-clock wise like if you were removing the bolt on the transmission drain bolt, I believe this is a 1/2 inch allen. Or you can also use a 1/2 inch end of the ratchet.

[nissanfreak12]

Honestly, take it to a machine shop and see if they can remove them real quick and ask them if it would be safe to just seal back up. Guarantee they will have that size to take it off and can look to see what is behind it, and better assess it.