What Tool To Use To Take Off This Cover?

[svarog]

Hello I am thinking of changing my spark plugs and I am assuming I need to take this cover off, but I can't, none of my tools fit in there. I don't want to just rip it off either.

Here is picture.

And another question, is it bad to mix spark plugs? Can I just replace front 3 and do others in a month?

Thanks in advance.

[Toysrme]

Allen wrench. Go buy a set of metric ones. You can do plugs however you want. You're engine man. ;)

[svarog]

That was my first guess and first things i've tried.

They must be stripped then! :(

Any tips on what to do? I tried jamming bigger sized ones in there just now and still no go.

[svarog]

I got it off!! Feel stupid!

I was putting it inside the little hole, but I got to use the big one. Thanks for help!

[Toysrme]

Try and SAE set for an in-between size, along with some spray penitrating oil to loosen it up.

I've had one dead on something else before (Not an engine, with a plastic cover tho). I got it off by taking a bigger allen wrench & beating it to fit with a hammer. Same way you would a nut, or bolt. Tool steel is tough. May break a tool eventually, but they have warr.'s for a reason. :)

Anyone else know how to get a stripped allen nut out?

*edit*

Nevermind.