375K..Good pressure...heads only?
 

Great forum, thank you all!!! I know: while you are in there, but..........my bottom looks good with oil pressure at 1 Bar idle (checked with a mechanical gauge - not at cluster), no strange noises, and 2k RPM = 2 Bar, 3k RPM = 3 Bar..........However, a while back the air alternator duct air baffle fell leaving # 6 without adequate cooling for over two years, so I suspect broken or no longer tempered rings? (fouled plug at #6 - no change at idle while removing #6 cylinder at idle - have pulsating blowby indication at oil filler neck)....that's the only reason I want to open her (Beautiful Gretchen.......hehehe....1981 911SC triple black....opened in 1994 for a head job at 40 K - broken stud...had 24 Dilavar installed then and still holding to this date - have steel studs and all the parts for the top).....do not want to disturb the bottom and also want to provide some comfort to everybody here: these engines are bulletproof!!.......still running so strong!!, and only smokes a bit under very strong acceleration or deceleration (has Alusils BTW)....I just don't want to open what I feel is a good/great Porsche factory bottom......Comments please....Thank you all for a great forum...Best,

I am glad to report that even at 400K miles "it seemed" that I did not have to split the case but it is wise to do since "while you are there" is such a small step..........main bearings were still looking good but replaced with our host parts, and #3 big end rod pitted and ready to spin/fail (#6 exhaust valve burned thru), so splitting is, or seems to be, a good idea given the time and effort while you are there. I just want to thank you all Pelicanites for a great forum as I just completed a solo rebuild of my 81 SC with all your collective help,..... now leak free and smooth(thank you Henry Supertec...yes, green Viton and Dow Silicone works....and recommended sealants.... I noticed some comments on these issues.....did I miss some comments by others on sealants that degrade seals mechanical properties?).........now continuing on my 21st year of daily driving in sunny Los Angeles....Thank you all!!!

Threads like this are excellent. :D