I can give you part of the answer - no, don't torque the head from one end
to the other. Generally you start in the middle of the head and spiral your
way out, or in some cases, zig-zag your way out, to the ends. Here's the
pattern for the U20:
http://www.gordon-glasgow.org/Images/U20_Head_Bolt_Sequence.JPG
The U20 head is torqued in three steps: 43 lb/ft, 63 lb/ft and 65 lb/ft.
Amazingly, the factory manual says nothing about the steps or the sequence
for the R16. It only gives the final torque spec, which is 45-50 lb/ft.
Gordon
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of
> JRice@koaspeer.com
> Sent: Thursday, July 14, 2005 4:44 AM
> To: datsun-roadsters@autox.team.net
> Subject: Head Torque
>
>
> Hi, I have a question for the group.
>
> I am trying to trouble shot an intermittent problem I am having with my
> Datsun '69
> 1600. The car is running but every once in awhile the car bogs down and I
> get
> a back-fire when I feather the throttle to keep the car running. I had
> someone follow
> me and he said when the car back fires a puff of white smoke comes out. I
> am also
> getting a lot of condensation in the engine and out of the exhaust pipe.
>
> My thinking is that I have a leak in my head-gasket. I tried to tighten it
> down and
> my problem got worse. The car would bog down more often.
>
> I pulled the head and have installed a new head-gasket. I am going to
> change all
> of the gaskets on the way out as I put everything back together.
>
> The question I have is what is the recommended sequence for torquing down
> the head?
>
> - Should I start in the rear and work forward? Then proceed
> backwards? Or start
> at the rear again
>
> - My plan is to go through the torque sequence at 20ft lbs, 30ft
> lbs, 40 ft lbs, 45 ft. lbs
> then end at 48-50 ft. lbs.
>
> Is this the correct way?
>
> In addition is there a recommended torque on the exhaust, intake
> manifolds?
>
> Thanks for the help,
>
> Jeff Rice
> Bradford, PA
>
> '69 1600
> '66 1600 Future Project.
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