8v71 4 Valve Heads

Dreamscape · January 28, 2010, 07:32:33 AM

Can someone shed some light on this for me? My manual does not have any information, only 2 valve heads.

Thanks,

Paul

luvrbus · January 28, 2010, 07:36:06 AM

Need to get a newer book Paul, fwiw I know your engine is a 4 valve

good luck

bevans6 · January 28, 2010, 07:39:06 AM

How can you tell if the heads are 4 valve or 2 valve without pulling a valve cover?

Brian

luvrbus · January 28, 2010, 07:49:39 AM

Casting number on top of the heads 6117438 for 2 valve 6117433 for 4 valve

good luck

Timkar · January 28, 2010, 07:49:51 AM

Maybe this will help to identify (as long as the heads are original to the block)
http://www.powerlinecomponents.com/literature/detroit_diesel/v71_model_chart.htm

TomC · January 28, 2010, 08:10:31 AM

8V-71 was only made with 4 valve heads. Good Luck, TomC

luvrbus · January 28, 2010, 08:20:17 AM

You are wrong there Tom

good luck

Dreamscape · January 28, 2010, 09:31:36 AM

Dallas sent me a real manual in pdf!

Thanks!

TomC · January 28, 2010, 01:47:18 PM

Luvrbus- you are right, I checked with Don Fairchild and some of the early 8V-71's did have 2 valve heads. But-I bet there aren't too many left now. Good Luck, TomC