6.9l engine build up
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Postmaster
Joined: Jan 2010
Posts: 4,319
Likes: 4
From: Elk City, OK
its not a factory turbo engine BUT my spare motor is. why the valves? if they are the same size, whats the advantage? and the turbo engine oil cooler is the same as my non turbo cooler so again, whats the advantage? not trying to be a ***, just curious. i know nothing about the 6.9 except its the thicker wall father of the 7.3
Postmaster
Joined: Jun 2007
Posts: 2,621
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From: Sweetwater Texas
[quote=oreocreaming;8940906 not trying to be a ***, just curious. i know nothing about the 6.9 except its the thicker wall father of the 7.3[/quote]
Also don't forget that the 6.9 uses 7/16 bolts, and the 7.3 uses 1/2 bolts for the head. The heads were also a bit different, but only slightly I think the water jackets or somethings.
Also don't forget that the 6.9 uses 7/16 bolts, and the 7.3 uses 1/2 bolts for the head. The heads were also a bit different, but only slightly I think the water jackets or somethings.
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
Also be aware that custom bolts can be quite expensive. The engine machine shop that did the work for me had a set of 6.9 heads in there for probably a few years that they don't know what to do with now. I considered using them for my build but unfortunately the hole was too large and he advised against it with 6.9 sized studs and washers.
Elder User
Joined: Apr 2002
Posts: 950
Likes: 2
From: West Bend
Oreo - if I remember correctly the 7.3 turbo valves were inconel valves and the 7.3 turbo oil cooler had a higher "fin per inch"rating for slightly increased thermal transfer efficiency in the same package size.
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
swooshcmk has it right, the turbo oil cooler has more fins per inch and should cool the oil better.
Also the inconel alloy exhaust valves take the heat better.
Glow plug sheaths, pyrometer thermocouple sheaths, turbo fins and turbo exhaust valves are a few of the places you find inconel used.
Also the inconel alloy exhaust valves take the heat better.
Glow plug sheaths, pyrometer thermocouple sheaths, turbo fins and turbo exhaust valves are a few of the places you find inconel used.
Senior User
Joined: May 2010
Posts: 288
Likes: 0
From: Oregon
Not trying to hijack the thread just wondering would it be worthwhile to ceramic coat those valves or would there be little gains? I'm taking notes on this stuff because I need to either rebuild or replace my motor.
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