oil drain plug

[hrlyfxdl]

I am looking for any information or pictures on what the original oil drain plug would look like for a 1968 Camaro. The car has a 350 in it, it's supposedly an SS (not sure if that matters on this issue). I see so many different kinds out there for sale from vendors and 2nd party, not sure what it a correct finish or marking. Went through the other forum discussion and didn't see any images. Thanks for any help.

[bertfam]

I see so many different kinds out there for sale from vendors and 2nd party, not sure what it a correct finish or marking.

That's because there isn't just ONE correct plug. There were multiple suppliers so multiple markings.

Ed

[hrlyfxdl]

Good to know Ed, thank you for the info.

[bertfam]

Here are just 3 of the many I've seen. Different (or even NO) markings, but they all have one thing in common. They all have the "shoulder".

Ed

[Mike S]

Looks like SB are different styles than BB?

Mike

[bertfam]

Looks like SB are different styles than BB?

Nope. All engines used the same size drain plug (1/2"-20 thread), but there WERE two different sizes for the hex head used. Up until sometime in 1968 (exact date unknown), the head used a 7/8" wrench, and then after that they used a 9/16" wrench. All were interchangeable other than that.

However, in answer to the OP's original question, even though the books say the changeover date was sometime in 1968, I've never seen a 68 Camaro with the early 7/8" head plug. Another interesting research topic?

Ed

[Mike S]

Hi Ed,

  The size is what I meant in relation to the type (or style). I checked both 67 L35's (March and April assembly dates) and they have the 7/8" plug though with different head markings.

Mike

[68camaroz28]

Our 68 has a RSC drain plug.

[cook_dw]

Here ya go Mike.  03D 68

[Mike S]

  Hi Darrell,

       Mine looks like the 55-68 style picture posted. Though the usage period is said to be 55-68 it looks like the ones posted for '68, including yours, is the smaller head style.

Thanks!
Mike

[Jon Mello]

Here's a drain plug on a '67 302 Z-28 engine. It uses the 7/8" wrench.