Thread: V6 3.4 or 4.3 How can you tell

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Thanks Bob. This may be a dumb question, but I think I know how to figure the 90 degree and 60 degree of a motor, but could you refresh me? Is this a straight line from the cylindor to the crank then back up the other cylindor?

here's a 4.3 V6...joe

this is a 3.4...

Originally Posted by redavenport

Thanks Bob. This may be a dumb question, but I think I know how to figure the 90 degree and 60 degree of a motor, but could you refresh me? Is this a straight line from the cylindor to the crank then back up the other cylindor?

Yes, the bank angle is the angle formed between the main bearing bore centerline and the centerline of the cylinder bores in the left and right bank. The GM family of V6 engines which include the 2.8, 3.1 and 3.4 have a 60º bank angle. The V6 engines that were derived from the V8 retain the 90º angle.

Bob