"Josh Battles" <josh.lists@omg-stfu.com> wrote:
: On Tue, December 20, 2005 1:08 pm, jon@dakota-truck.net wrote:
:>
:> The Magnum engines use a torque to yield bolt for the intake, so they
:> will stretch when torqued down. When they have been torqued down once,
:> they have stretched all they are supposed to, so you shouldn't re-use
:> them. Interestingly, the head bolts are also torque to yeild, however
:> you are allowed to re-use those once. (The procedure that is supposed
:> to be followed is a dab of paint should be put on the head of any head
:> bolt which is re-used, that way the next guy who pulls the heads knows
:> not to re-use them.) Anyhoo, bit of a digression there. :-) The intake
:> bolts should only be used once, and in fact the gasket kit that you
:> will need to get at the dealership for the side, front and rear gaskets
:> will include new intake bolts.
: Cool. So do I need to use a torque wrench on the bolts then or not because
: they're torque to yield? I guess I'm looking for more information on how
: these fasteners work
Yep, torquing them to the correct value will ensure the proper amount
of stretch. The bolts need to be streched a certain amount, and without
a torque wrench, you're likely to either not strech them enough or too
much. The values given in the FSM have been determined to produce the
proper amount of stretch. Some torque to yield fasteners are supposed
to be torqued to a certain value and then turned a certain number of
degrees beyond that torque to produce the stretch, but in the case of
the intake manifold bolts, you just torque them to the final value
(in 3 stages, IIRC.)
--
-Jon-
.- Jon Steiger --- jon@dakota-truck.net or jon@jonsteiger.com -.
| 67 Dodge Coronet, 70 Plymouth Barracuda, 76 Peugeot TSA |
| 78 Dodge B100, 90 Dodge Dakota Convertible, 92 Dodge Ram 4x4 |
| 96 Dodge Dakota, 96 Suzuki Intruder 1400, 96 Kolb FireFly |
| 99 Jeep Cherokee 4x4, 2001 Dodge Ram 3500 CTD |
`--------------------------------- http://www.jonsteiger.com --'
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