Is it OK to use hardware store locknuts on valve covers?

[Noel]

I finally got around to checking my headstuds on the exhaust side and was curious about just using stainless steel locknuts from the local True Value to reinstall the valve covers. Is this OK?

Thanks,

Noel

[john walker's workshop]

you could chew up the covers with the tooth on the lockwasher. besides, the aluminum washers are a "sealing washer".

[Jim Sims]

Use the aluminum bearing washers as John Walker recommends and the OEM plastic insert lock nuts. The correct OEM lock nuts have a colored or darker plastic insert which is rated for the temperatures seen in 911 engine service. Do not use the white plastic nylock type insert lock nuts commonly found in hardware stores. These will creep and loosen at 911 engine temperatures. Cheers, Jim

[Noel]

Actually John, I was refering to the stop nuts with the plastic in them. I refer to them as locknuts, but that may not be the correct term.

So would basic stop nuts with the nylon/plastic in them with aluminum washers do the trick? I just didn't want to pay shipping and handling for them if I could just run down to Tru Value and pick them up.

BTW, no broken head studs! I was just paranoid since I have a track event scheduled in a couple weeks and have never check them before.

Thanks again,

Noel

[Noel]

Thanks guys!

[911nut]

Originally posted by Noel
Actually John, I was refering to the stop nuts with the plastic in them. I refer to them as locknuts, but that may not be the correct term.

I've heard them called "Nylock nuts".