Alfa Romeo Forum - View Single Post - What kills the T-spark???

Ralf S. · 27-05-2008

Aye! It is (was?) the practice to categorise the crank bearings into different size Categories depending on the manufacturing tolerances but modern computer-controlled machining may have put an end to need for that.

Normally they were marked "A", "B", "C" or "D" and you matched the shell with the same letter.

Other manufacturers used a colour code (white, yellow, green, blue).. but it's the same principle. The colours corresponded to size range required.

Ralf S.

27-05-2008	#43 (Post Link)
Ralf S. AO Gold Member Join Date: Feb 2002 Location: The land that Time forgot Posts: 6,096 Member car: Skinny 155v6 ICBM	Re: What kills the T-spark??? Aye! It is (was?) the practice to categorise the crank bearings into different size Categories depending on the manufacturing tolerances but modern computer-controlled machining may have put an end to need for that. Normally they were marked "A", "B", "C" or "D" and you matched the shell with the same letter. Other manufacturers used a colour code (white, yellow, green, blue).. but it's the same principle. The colours corresponded to size range required. Ralf S.