Bimmer Doc here in San diego said to go 28mm I think.
I think it was cold, not sure.
A bit looser than spec?
Bavauto sells the tool, which is nice But
you can use a small allen wrench to do the adjust.
i just replaced the whole motor so Ive got another 800 miles to go for the break in before I adjust them for the first time.
Listen to StarMavin!!
'87 325is Delphin Metalic