oldford Posted July 9, 2013 Share Posted July 9, 2013 I posted this thread below in the Reo section, but little activity down there. Maybe up here will be better...Reo T6 Valve Question I am in the middle of a valve job on this T6 engine and hope to get a question answered. The intake valves are in the head and are cupped shaped. I have never seen cupped valves like this, so I wonder if they are this shape by design or because of damage. I question damage, since they are all the same and the cupping is quite uniform, but the center of the valve is at least 1/4" below the rim. I have tried to draw a picture, but my skills are lacking. Any help from you T6 experts???Frank Link to comment Share on other sites More sharing options...
F&J Posted July 10, 2013 Share Posted July 10, 2013 I had a T6 but I don't think I ever had the valves out.Are all the valves like that including the intake valves? If they are, then it was made that way. Intakes run very cool and would not do that. Link to comment Share on other sites More sharing options...
oldford Posted July 10, 2013 Author Share Posted July 10, 2013 I tend to think the same way, the valves are too uniform in shape to be that way from damage. Below on the Reo forum, I found that the cups are by design.Frank Link to comment Share on other sites More sharing options...
Rusty_OToole Posted July 10, 2013 Share Posted July 10, 2013 Some engines came with these cupped or tulip shaped valves. I don't know what good they were supposed to do. If you need to replace some valves and can't get the original style, ordinary flat valves will work just as well. Link to comment Share on other sites More sharing options...
Rusty_OToole Posted July 10, 2013 Share Posted July 10, 2013 No way would valves go that way from heat or wear. They would burn out or the head break off first. Link to comment Share on other sites More sharing options...
Larry Schramm Posted July 10, 2013 Share Posted July 10, 2013 Before anyone jumps to a conclusion, I would compare the valves to a NEW valve. If a New OEM valve looks like that, then I would say that they are made that way. If not the condition that you describe is called is a Tulip Valve and is caused by an overheating condition. If I can find the one that I have around the house I will post a picture. It was caused by an overheated cylinder. Link to comment Share on other sites More sharing options...
oldford Posted July 10, 2013 Author Share Posted July 10, 2013 I have just heard from the rebuilder. These valves are that way by design and form part of the combustion chamber. The head is 2.5" in diameter (BIG valve). Luckily, they are all good and reuseable, 'cause the new replacement valve is $120 each.Frank Link to comment Share on other sites More sharing options...
Larry Schramm Posted July 11, 2013 Share Posted July 11, 2013 That is good news. Link to comment Share on other sites More sharing options...
Guest cben09 Posted July 28, 2013 Share Posted July 28, 2013 This was not a good design to begin with,,,Hot gasses and or carbon stayed in the pocket and caused pre-ign problems,,,If you replace them,,,avoid this poor design,,,Cheers,,Ben Link to comment Share on other sites More sharing options...
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