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3.4 Bigger is better
Join Date: Nov 2003
Location: South Dakota
Posts: 1,497
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Flange nuts for head studs
Has anyone used flange nuts in place of the barrel nut on head studs? The flange nuts are what Supertech and others use instead of barrel nuts. This would not replace the washers but be used with them.
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Michael 88 911 Diamond Blue CE Carrera 3.4 HC3.4 member 2020 Honda Passport |
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02-06-2006, 04:43 PM
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Irrationally exuberant
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I've used "reduced wrench size" nuts on some head studs to clear the lower plugs. No matter what nut you use it will probably produce a different tension on the head stud because the bottom of the nut will have a different friction than the factory barrel nuts.
Does it matter? I don't know. -Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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02-06-2006, 07:28 PM
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3.4 Bigger is better
Join Date: Nov 2003
Location: South Dakota
Posts: 1,497
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Chris,
Didn't think about the tension issue. Wouldn't the anti-seize that is recommended counter act that tension difference to some degree? I was thinking that the flange nut contact area would be about the same as the barrel nut. I am looking for flange nuts to replace the barrel nuts on the intake plenum like Ralph used. Just got me thinking about the head studs also. Have a few sources I am checking with for that.
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Michael 88 911 Diamond Blue CE Carrera 3.4 HC3.4 member 2020 Honda Passport |
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02-06-2006, 08:30 PM
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Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,818
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Don't feed the trolls. Don't quote the trolls  http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
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02-07-2006, 05:47 AM
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Registered
Join Date: Dec 2002
Location: Seattle
Posts: 661
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On a related note, Neil Harvey at Performance Developments makes and sells some very nice head washers that look like hats. They have a snout that fits snugly in the head that reportedly reduces the tendency for the head to deflect or distort, which can cause loss of head torque. They require that a small counterbore be made in the head. The extensions on these washers prevent radial deflection around the hole by providing support in that direction.
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02-09-2006, 05:06 PM
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The Blue Pheonix
