I was checking the oil today after a long and hot PCA (Porsche Club) autocross in San Diego in my '82 924 Turbo (2.0L CIS)....won GP Class, BTW
Noticed that directly under the oil filler cap is the lobe for #1 cylinder, and usually the lobe is actuating the valve so I can't see its lumpy side. Today it was up, and there are distinct wear marks and small pits near the apex of the lobe. There are no rockers and the valves are directly below the cam lobes. Engine has 60K miles on it, sparkly clean inside and out, no leaks, no consumption, no abnormal valvetrain noise.
Running Royal Purple 15w-40 for about 2500 miles, time to drain and get UOA? What should I run in the mean time? Doug says M1 T&S 5w-40, but I'm thinking that the 40-wt may not be cutting it. I don't want to over-thicken the turbo feeds, as running a "heavier" 50-wt has *traditionally* spelled the end for these finicky oil-cooled KKK Audi turbos.
I have all weights M1/EP, RP/Racing RP, RedLine, and Motul at immediate disposal to me...what to do?
-JamesW
Noticed that directly under the oil filler cap is the lobe for #1 cylinder, and usually the lobe is actuating the valve so I can't see its lumpy side. Today it was up, and there are distinct wear marks and small pits near the apex of the lobe. There are no rockers and the valves are directly below the cam lobes. Engine has 60K miles on it, sparkly clean inside and out, no leaks, no consumption, no abnormal valvetrain noise.
Running Royal Purple 15w-40 for about 2500 miles, time to drain and get UOA? What should I run in the mean time? Doug says M1 T&S 5w-40, but I'm thinking that the 40-wt may not be cutting it. I don't want to over-thicken the turbo feeds, as running a "heavier" 50-wt has *traditionally* spelled the end for these finicky oil-cooled KKK Audi turbos.
I have all weights M1/EP, RP/Racing RP, RedLine, and Motul at immediate disposal to me...what to do?
-JamesW