Does anyone have the Revised Intake Manifold Torque Specification from TSB 77-61-18

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Joe - 27 Mar 2005 01:37 GMT

I just crushed one corner of my new plenum by using the torque
specification from my manual (11 lb-ft). Does anyone have the revised
spec (in TSB 77-61-18)?

Any suggestions as far as the crushed bolt hole? It's the one in the
front passenger-side corner, in front of the pressure sensor.

Thanks,

Joe

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Ted Mittelstaedt - 27 Mar 2005 09:21 GMT

> I just crushed one corner of my new plenum by using the torque
> specification from my manual (11 lb-ft). Does anyone have the revised
> spec (in TSB 77-61-18)?
>
> Any suggestions as far as the crushed bolt hole? It's the one in the
> front passenger-side corner, in front of the pressure sensor.

It would be helpful to know the make and model and year!

I assume the plenum is plastic, as I doubt you crushed an aluminum plenum.

If so you can probably build up the section with epoxy then when it hardens,
file it to shape and redrill the hole.

Ted

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Joe - 27 Mar 2005 15:02 GMT

Sorry, I rushed to send this off.

1997 Poniac Bonneville. Yes, it is plastic.

Thanks,

Joe

>> I just crushed one corner of my new plenum by using the torque
>> specification from my manual (11 lb-ft). Does anyone have the revised
[quoted text clipped - 11 lines]
>
>Ted

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aarcuda69062 - 27 Mar 2005 16:04 GMT

> I just crushed one corner of my new plenum by using the torque
> specification from my manual (11 lb-ft). Does anyone have the revised
> spec (in TSB 77-61-18)?

89 inch pounds, in sequence. I do them in stages, i.e., 50 in.lb,
75 in.lb, 89 in.lb
Make sure that everything is clean and dry, no oil to throw off
the torque measurement.

> Any suggestions as far as the crushed bolt hole? It's the one in the
> front passenger-side corner, in front of the pressure sensor.

Try a 1/4' flat washer that is bigger than the flange on the
screw to spread the load... how bad did you crush it?

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Joe - 27 Mar 2005 22:58 GMT

>> I just crushed one corner of my new plenum by using the torque
>> specification from my manual (11 lb-ft). Does anyone have the revised
[quoted text clipped - 4 lines]
>Make sure that everything is clean and dry, no oil to throw off
>the torque measurement.

Thanks.

>> Any suggestions as far as the crushed bolt hole? It's the one in the
>> front passenger-side corner, in front of the pressure sensor.
>
>Try a 1/4' flat washer that is bigger than the flange on the
>screw to spread the load... how bad did you crush it?

The outside corner of the bolt hole is compressed a bit, so the
surface of the plenum under the bolt head is not horizontal. The head
of the bolt will snug up against the plenum when I tighten it, but the
bolt is forced to lean to the outside.

It seems to hold tightly, but I hesitate to leave the bolt crooked
like that.

Joe

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aarcuda69062 - 27 Mar 2005 23:24 GMT

>> how bad did you crush it?
>
[quoted text clipped - 5 lines]
> It seems to hold tightly, but I hesitate to leave the bolt crooked
> like that.

You might try dressing it square with a flat file and then using
a washer that's larger as described to spread the load.

Usually it's the one on the drivers side rear with the stud that
gives the most grief...

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