mikey p
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| posted on 13/2/13 at 11:02 AM |
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Duratec Stretch bolts...
Which bolts are stretch bolt on a Duratec?
Head bolts are but what else?
Flywheel?
cam bolts?
front pulley?
Thanks
Mike
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mikey p
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| posted on 13/2/13 at 11:14 AM |
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or the location of a build manual would be good....
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austin man
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| posted on 13/2/13 at 02:38 PM |
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Generally the head bolts , most change the crank ones for ARP ones as they are stronger
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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big-vee-twin
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| posted on 13/2/13 at 04:13 PM |
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I have a build manual from Ford/Mazda U2U me your email I can send it to you
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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britishtrident
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| posted on 13/2/13 at 05:15 PM |
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Assume any bolt for which angular tightening procedure is specified a "stretch bolt", ie a bolt that is tighten into the plastic
deformation region of the stress-strain graph.
A hold load of myths surround stretch bolts, but as a roll of thumb any bolt that is subject to fatigue should be replaced if the engine is going
to be used for anything other than shopping. Although manufacturers generally recommend new bolts, head bolts are generally safe to re-use at
least once.
[Edited on 13/2/13 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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pjay
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| posted on 13/2/13 at 08:47 PM |
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Based on a quick think (all single use except the Girdle):
- Cylinder head
- Crank pulley
- Girdle - max. three use
- Big end (IIRC)
- Flywheel
As others have said have check through the assembly chart for angular tightening.
Now on my second Duratec build (for a second car) and on a budget I replace the following with ARP:
- Big end
- Crank pulley
- Flywheel
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