Quote:
Originally Posted by KTL
Yes the 996 GT3 main bearings are the same dimensions as the typical 3.0 SC, 3.2/3.3 and 3.6 air cooled engines. That's because the 996 GT3 engine case is based on the air cooled 3.6 case. So the crankshaft has the same size journals.
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Cool, good to know. My understanding is that the GT3 bearings come in different thickness, correct?
Who sells the different thicknesses? Didn't see them on our hosts site?
The glyco mains I bought from our host are in fact .0005 thinner than the old bearing. Even went out and got another fancier micrometer accurate to .00005 and it shows the same. Found a bunch of threads back to 2012 that show the same.
I don't want to increase my clearance by .001 (which the glyco would do). In fact, would love to decrease it by .001 if possible.
As in my prior thread, I did have my original bearing coated at HM Elliot. The website says it tightens up the clearance about .0003 per shell (.0006 total). By my measurements, it tightened it up .0001-.0002 total... They somehow prep the surface prior to coating, and I suspect that eats away some material. May just send it back to them to get their "double coating" but if GT3 bearings come in different thicknesses that would be preferable...
Still don't understand why the new glyco would me manufactured thinner than before. The bearings are all the same, not like one's out of spec... And assuming its intentional, why wouldn't that be posted on the bearing packaging? Increasing clearance by .001 is somewhat of a significant detail...