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Author Topic: Plenum Bolts Torque  (Read 5171 times)

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JamesV6CDX

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Re: Plenum Bolts Torque
« Reply #45 on: 27 October 2011, 16:10:21 »
Quote from: amba on 27 October 2011, 15:49:11
Well as my internet was down during my refit >:(,and I didnt have the benefit of the knowledgeable ones advise :y I have torqued them down to 20nm which seemed consistant with the injector manifold and sandwich plate. :D

In the real world, it's unlikely to do any harm  :y
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TheBoy

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Re: Plenum Bolts Torque
« Reply #46 on: 27 October 2011, 18:08:33 »
Like it or not, the official value is 8Nm.

Its just tight enough to seal the 6 o rings, without crushing them to buggery
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JamesV6CDX

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Re: Plenum Bolts Torque
« Reply #47 on: 27 October 2011, 18:36:46 »
Quote from: TheBoy on 27 October 2011, 18:08:33
Like it or not, the official value is 8Nm.

Its just tight enough to seal the 6 o rings, without crushing them to buggery

Are you of the opinion that tightening them beyond that could damage the rings then TB?
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feeutfo

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Re: Plenum Bolts Torque
« Reply #48 on: 27 October 2011, 18:55:44 »
How can the o rings be crushed or damaged? They sit in a grove designed for that diameter o ring. Its not possible to crush them unless an o ring is unseated and gets trapped.

All the bolts have to do is compress the rubber to seal until the plenum is tight to the manifold. That takes 8nm to achieve. Any more is over tight for the purpose of squashing the o rings, obviously a bolt that size will take more, as will the thread in the inlet fanimould, although I would think that's the week point.

IMO just do em up, making sure the o rings remain seated correctly while locating the pegs. Far more important than a couple of "nums".

4 pages, Lordy!


Oh, I can believe the cam shaft caps are 8nm either. But they are! :)
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TheBoy

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Re: Plenum Bolts Torque
« Reply #49 on: 27 October 2011, 19:05:01 »
Quote from: JamesV6CDX on 27 October 2011, 18:36:46
Quote from: TheBoy on 27 October 2011, 18:08:33
Like it or not, the official value is 8Nm.

Its just tight enough to seal the 6 o rings, without crushing them to buggery

Are you of the opinion that tightening them beyond that could damage the rings then TB?
Not in the short term.

Given the depths of the grooves, probably not in the long term either.
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amba

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Re: Plenum Bolts Torque
« Reply #50 on: 27 October 2011, 20:54:05 »
So after 4 pages  ;D ;D ;D the definitive answer is 8nm  :y ; but if they were torqued down to 20nm that would still be fine  ;D :y

Anyway that is what I have done mine to  :)
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Andy B

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Re: Plenum Bolts Torque
« Reply #51 on: 27 October 2011, 21:04:29 »
Quote from: amba on 27 October 2011, 20:54:05
So after 4 pages  ;D ;D ;D the definitive answer is 8nm  :y ; but if they were torqued down to 20nm that would still be fine  ;D :y

Anyway that is what I have done mine to  :)

split the difference with 14 ........  ::) ::) ;D ;D
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amba

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Re: Plenum Bolts Torque
« Reply #52 on: 27 October 2011, 22:14:39 »
Perhaps it would be nearer that with the accuracy of some torque wrenches  ;D ;D
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