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General Category => General Discussion => Topic started by: fotoguzzi on December 03, 2022, 02:38:28 PM

Title: Head bolt torq value
Post by: fotoguzzi on December 03, 2022, 02:38:28 PM
Are cylinder head bolts torq’d to 11foot pounds? Or am I reading this wrong?
What does +90* mean?


(https://i.ibb.co/0GsBnsb/E734837-A-EA48-4-A58-91-D0-8-E561841537-D.jpg) (https://ibb.co/0GsBnsb)
Title: Re: Head bolt torq value
Post by: Sye on December 03, 2022, 02:41:51 PM
Torque to 11ft lb, then turn a further 90 deg or 1/4 turn 👍
Title: Re: Head bolt torq value
Post by: fotoguzzi on December 03, 2022, 02:53:09 PM
Ok thanks
Title: Re: Head bolt torq value
Post by: guzzisteve on December 03, 2022, 03:27:14 PM
The total is 35ftlbs, been checked doing it like they say. Do 3 stages, 11ftlbs -22ftlbs-35ftlbs- done' All 6 at same time on ea side.
Title: Re: Head bolt torq value
Post by: DAMMAG on December 03, 2022, 04:14:37 PM
Quote from: guzzisteve on December 03, 2022, 03:27:14 PM
The total is 35ftlbs, been checked doing it like they say. Do 3 stages, 11ftlbs -22ftlbs-35ftlbs- done' All 6 at same time on ea side.

guzzisteve.  Do you torque them dry or are they oiled? The manual doesn't mention oiled by the look of it.

Damian.
Title: Re: Head bolt torq value
Post by: guzzisteve on December 03, 2022, 05:06:25 PM
The nuts, washers & bolts been coming out of mineral spirits. I don't lube the stuff no. If you use stock metal gaskets it is only 1 torque, no re-torque.
Title: Re: Head bolt torq value
Post by: fotoguzzi on December 03, 2022, 06:19:16 PM
Are those stock head gaskets metal on a Norge? I’ll have to look closer. I would like only 1 torq!
I believe both sides passed the squish test.


(https://i.ibb.co/rGVrNg9/137-EA170-50-A1-441-B-B781-D7383046-AE0-D.jpg) (https://ibb.co/rGVrNg9)

(https://i.ibb.co/B4MfSjj/FF002784-D828-48-D6-BBF2-D023-CA7-B4999.jpg) (https://ibb.co/B4MfSjj)
Title: Re: Head bolt torq value
Post by: guzzisteve on December 03, 2022, 06:43:44 PM
Should be 3pcs metal all together.
Title: Re: Head bolt torq value
Post by: fotoguzzi on December 03, 2022, 08:32:17 PM
My exhaust header studs came out rather than the nut coming off.. I can’t get the nuts loose.. do I need new studs and nuts or can I at least temporarily just screw the stud/nut into the head?
Title: Re: Head bolt torq value
Post by: guzzisteve on December 03, 2022, 08:41:47 PM
If you have them out of the head, put in a vice & cut slice in nut w/dremmel not quite through then crack it w/chisel.
Title: Re: Head bolt torq value
Post by: John A on December 03, 2022, 10:26:30 PM
Sometimes you can clamp a vice grips on the unthreaded portion of the stud and wind the nut off. If there is no unthreaded portion,I just grab it in the middle.
Title: Re: Head bolt torq value
Post by: nc43bsa on December 03, 2022, 10:39:42 PM
As an aside, almost always when I've run into the "+90°" torque value, the fasteners are of the "one time use" variety.  I remember Ford cylinder head bolts were throwaway items and the head gasket set came with new bolts.

Guzzi may have a different idea about this.