[Supras] ARP-2.2 mm Cometic head bolt retorquing

[Jeff Mohler]

Brian..you DO mean an electric sender guage, right?



On 10/29/07, Walker, Brian (Rich. Dist) <Brian.Walker2 at vdot.virginia.gov>
wrote:
>
> Bernie, FWIW I've never done a retorque of the head bolts (replacing
> rings/bearings about 6 years ago, hand lapping of block, HKS MHG and
> stock bolts tq'd to 75 ft-lbs.) I don't know if the necessity would
> differ for the ARP bolts. Have they been torqued to yield at 85 ft-lb?
> That may be the determining factor (no longer in elastic range so less
> tendency to back off)
>
> I noticed something in your post and wanted to point it out, many people
> are concerned with fuel press gauges in the fuel rail. I've got one too
> and several race buddies have pointed out stories of the gauge face
> cracking and throwing fuel onto the engine, etc. Especially if you're
> using the AFPR w/ mount that was sold as a mk3 kit, it points the gauge
> face right toward the alternator. I'm planning to remove it and replace
> with a sensor to an in cabin gauge for safety.
>
> Brian W
>
> Date: Sat, 27 Oct 2007 22:38:57 -0400
> From: "berniek at technicaldevelop.com" <berniek at technicaldevelop.com>
> Subject: [Supras] ARP-2.2 mm Cometic head bolt retorquing
> To: Rockey Fox <supr91tt at yahoo.com>, "Supras at supras.com"
>         <Supras at supras.com>
> Message-ID: <4723F641.3080406 at technicaldevelop.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Rockey and group:
>
>     Just got done pulling the top end of the engine apart and first
> removed the cam cover on the exhaust side after about 50 miles and maybe
> 10 temperature cycles.  The ARP nuts were tight.  They cracked slightly
> when loosening them with a torque of about 80-90 lb-ft.  When
> retorquing, virtually no tightening was required, even up to 90 lb-ft.
> I tried about 3 nuts, two in the center and one at the front end, and
> they were all the same.  After seeing that, I did not bother to remove
> the intake cover (difficult due to fuel pressure gauge  in the injector
> rail and dual injector connectors.  Left the stock ones in place "just
> in case" and spliced in the Greddy connectors).
>
>
>     I still wonder, though, if in time the indentations the gasket will
> make in the head and block from thermally induced relative movement will
> make retorquing necessary in the future.  Guess I might take a look at
> this again at perhaps 10K miles.  In the meantime, on to 14 PSI boost.
>
>
>     As always, comments would be appreciated.
>
>
>           BernieK
>
>
>
>
> _______________________________________________
> Supras mailing list
> Supras at supras.com
> http://supras.com/mailman/listinfo/supras_supras.com
>