I am designing an aluminum 2.2 liter V6 that will eventually end up in my Lancer, it's to be based on the 4b11t mains and 6g72 rods. I've arranged to work with university engineering students (cheaper than employed engineers) for testing -- a task I'll be crowd funding.

Request:

If anyone has an engine out and wouldn't mind making a few quick, accurate measurements I'd really appreciate it. If you are able to contribute, please make all readings in metric, I never trust conversions.

> crank timing toothed-ring: The diameter and width of the crank "journal" it sits on (in other words the inside diameter and depth of the ring. The bolt pattern and size from the ring. The outside diameter of the ring and the sizes of the teeth.

I think this may be 100 mm (based on the number 100 stamped), and about 5 mm thick?

> Crankshaft: The dimensions on the transmission end, including bolt pattern and size,
the diameter and width of the crank end, as well as any space between the crank end and the last journal,
the main journal widths (not diameter (52 mm). I'd like the width and diameter of the shoulder at the end of these journals, but might not use this spec.
I'm especially interested in whether the journals are all the same, since the main caps are not.


> main caps (thrust and other): I procured a set and have the measurements.



The reason I need these measurements is for fit mostly, although I do plan on using the 4B11 head bolts, main caps and bearings, and crank sensor (I always hated the 6G72 sensor arrangement). I don't need any of the crank nose measurements because I'll be going with the 6G72 pieces -- minus the sensor.

 

More info:

I've tried measuring these dimensions on drawings and I get the following (with notes)

Main width: range 25 to 27 mm. This seems too big, since the bearing width is only 18mm, I'm expecting closer to 20 mm. I procured a set and have the widths, etc. measured, the thrust bearing surprised me.

Timing "ring": inner diameter 80 mm, width 5 mm, outer diameter 100 mm. Again, this seems too large, although I'm inclined to believe the 5 mm width.

Crank: there doesn't seem to be any "gap" between the rear main and the flywheel attachment.


----------------------------------------------------- Found -----------------------------------------------------

rod width 21.8 mm -- technically not a measure I need.

Main cap: Got a set (4 bolt mains) and measured them, request edited.