BCM Community
Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: Paso One on November 11, 2010, 06:39:58 PM
Well popped the valve covers off both engines today, and the 6V71 has 2 valve heads the donor 8V 71 has 4 valve heads.
Not sure if Jacobs make bridges etc.. for the 2 valve head.
Well I am re thinking rebuilding the 8V after all it's only money :)
2 valve heads were very common on the 6V-71's in transit buses since they have better low end torque then the 4 valve head-meaning they work better with the 2 spd automatic. Not much you can do to bump the horsepower-that's why Detroit came out with the 4 valve head. I believe the Jakes were originally made for 2 valve heads, and the bridges were made to adapt to the 4 valve head-If I'm wrong, I'm sure I'll be corrected shortly. Good Luck, TomC
The 2 valve head uses a cap on one valve each side , 6 caps (3 on ea side) hard to find may I add
good luck
Thanks for the info about the caps Clifford :)
Do you know where I might find a picture of these caps???
It would be nice to see what I am looking for :0
I have heard all the benifits you mentioned TomC with the 2 valve heads in a Transit who would have figured going back to a 1938 version to fix transit whoes....