cjoenck

I just replaced my original transmission mounts (89k miles) with "new" ones and I noticed the manufacturing date on the fresh mounts was 10/97. So the "new" mounts, purchased from a reputable dealer, have been sitting on a shelf for over 20 years. Does that mean rubber bushings, etc. don't age? Visually the new mounts seem fine but I am wondering about the expiration dates of parts like that.

chsu74

Rubber do age. Have you experienced aged rubber bands breaking on you? Surgical latex gloves and tires have date stamps for a reason.

cjoenck

That's my point. So when we install "new" parts that aren't exactly new, are we we really improving the car? Some of these parts don't seem to have an aftermarket equivalent - I couldn't find transmission mounts for a '90 Tiptronic - that was produced yesterday. Am I overthinking this?

chsu74

Buy function first insert and be done with it.

cjoenck

Unfortunately I don't think that's a solution for a '90 Tip - unless I am missing something.

Peteinjp

Personally for things like transmission mounts etc. I wouldn’t worry about it. If rubber parts are not exposed to O-Zone and our unused They they seem last of very very long time.

cjoenck

Agree, I have settled on that thought as well and I have to assume that Porsche is storing these part in decent conditions.

A914MAN

If they were sealed in plastic they should last longer

JGPierce

Would people use a NOS cam gasket kit or too risky for leakage?

Navaros911

I wouldn't... too much work to go in again and redoing it if it doesn't work the first go around.