[kamaro]

I have decided to refresh my '87 Carrera 3.2 engine, just a typical rebuild, nothing fancy, and after 180,000 miles it must be due for that anyway. I bought a set of main/rod Glyco bearings from design911 in UK (just because of faster delivery time) but I was surprised when I saw between 0.004 and 0.005 of clearance in the mains which is excessive, I tried the old ones and they went back to 0.002 consistently on all of the main bearings, I happen to have another set of Glyco main bearings on the shelf so I tried them and sure enough it gave me the same excessive clearance. also I happen to have another old used Porsche 3.2 main bearings which are almost scratch free and I tried them as well and they were all OK @ 0.002 .. Whats wrong with all the Glyco main bearings being way out of spec like that? .. I know they had a similar issue few years ago with the con rod bearings but now I see the same issue again with the mains. and BTW the con rod bearings are fine with 0.002" clearance among all 6 rods. I used both plastigauge method and mic/boregauge method just to be %100 sure. I have decided just to use the used genuine Porsche set and call it a day.