Turbobike Web Site www.Turborick.com

Re: [turbobike] head studs

shammar@nsk-corp.com
Mon, 13 Dec 1999 06:58:51 -0500

--0__=K7GwhoGmX4uNbwECGVFxssKj2LmGmgxTnplKelnrYyu0TiVjFji254yu
Content-type: text/plain; charset=us-ascii
Content-Disposition: inline


Hi Abraham,

What kind of studs do you use?  I always use the APE 4340 studs and nuts and
torque them to 40 ft.lb. for high Hp applications, or as low as 35 ft.lb. for
less demanding applications.  I've never had a problem with them and have been
reusing some sets for 10 years now (don't mistake a little leaking oil on a KZ
for a stud problem).  The only time you need to replace is if you yield the
material on a very high strength stud.  The yield and ultimate strengths are so
close to one another that you can initiate a failure.

Always use as little head nut torque as you need.  The higher the torque, the
more bore distortion.  Engine manufacturers are smart.  The best use "torque
plate honing", where a plate that simulates the head is torqued to the block,
inducing the same distortion that will occur in the engine.  The honing
operation is done under these conditions.  We can't do that, so we're always
left with the unknown.

If there is one lesson engineering has taught me, it's that no question is ever
boring or stupid, and there's always more to the issue than 90% of the people
believe.

By the way, did you find the cause of your knocking?  Knocks can be bad things.
Or do you just mean detonation?

Bob





"Abraham Mara" <umaraa00@umail.ucsb.edu> on 12/12/99 09:17:29 PM

Please respond to AbeFM@dis.member.org

To:   "turbobike questions" <turbobike@natvideo.com>
cc:    (bcc: Bob Shammas/EQA/Nsk-Corp)
Fax to:
Subject:  [turbobike] head studs



I hate to ask such a boreing question on here.....  I am about to put my
kz-1000 back together, and I know many cars need you to get new headbolts
each time as they stretch out, and botom out.  How do you tell if studs
need to be replaced?  There was a fair amount of knocking going on in the
motor, and I'd like to get it together so it doesn't leak oil or
compression or anything else...  Thanks
            -Abe.


--0__=K7GwhoGmX4uNbwECGVFxssKj2LmGmgxTnplKelnrYyu0TiVjFji254yu
Content-type: text/html; 
	name="att1.htm"
Content-Disposition: attachment; filename="att1.htm"
Content-transfer-encoding: base64
Content-Description: Internet HTML
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--0__=K7GwhoGmX4uNbwECGVFxssKj2LmGmgxTnplKelnrYyu0TiVjFji254yu--