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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: Dreamscape on January 28, 2010, 07:32:33 AM

Title: 8v71 4 Valve Heads
Post by: Dreamscape on 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
Title: Re: 8v71 4 Valve Heads
Post by: luvrbus on 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
Title: Re: 8v71 4 Valve Heads
Post by: bevans6 on 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
Title: Re: 8v71 4 Valve Heads
Post by: luvrbus on January 28, 2010, 07:49:39 AM
Casting number on top of the heads  6117438 for 2 valve 6117433 for 4 valve

good luck
Title: Re: 8v71 4 Valve Heads
Post by: Timkar on 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 (http://www.powerlinecomponents.com/literature/detroit_diesel/v71_model_chart.htm)
Title: Re: 8v71 4 Valve Heads
Post by: TomC on January 28, 2010, 08:10:31 AM
8V-71 was only made with 4 valve heads.  Good Luck, TomC
Title: Re: 8v71 4 Valve Heads
Post by: luvrbus on January 28, 2010, 08:20:17 AM
You are wrong there Tom 


good luck
Title: Re: 8v71 4 Valve Heads
Post by: Dreamscape on January 28, 2010, 09:31:36 AM
Dallas sent me a real manual in pdf!

Thanks!
Title: Re: 8v71 4 Valve Heads
Post by: TomC on 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
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