[12Ounce]

I think, in general, the 8 isolator bolts are the most important to replace. I doubt if any of the other "upper" seals are leaking ... and if not damaged, can probably be reused with a little petroleum jelly lubricant. I replaced all of mine new... not sure it was really necessary... but who knows?

I did this job on my '99 some 65k mi ago... and so long ago that the new upgraded (green) bolts were not available. I also did the "lower" seals and gaskets ... not mentioned on the link you provided ... and most likely not necessary, but mine was repaired before it was realized that nearly all leaks occur in the "upper". So, I did some unnecessary work.

My car stills runs good, but I would feel better if I had the newer green isolator bolts.

I highly recommend you find a small torque wrench for this job. The bolts don't require much torque ... some folks translate this to mean "no accuracy is required". NOT SO!

Some 3/8" beam (not the presettable "click" type) torque wrenchs will do the job. I bought one from Sears.