You have to open up the holes in the head to 7/16"
the stock bolts are 3/8" as well as the gasket
use the stock torque spec on the arp studs
not the arp spec torque
the head will deform under the higher torque spec
and the gasket will blow out sooner
if your motor is stock there is no need to use the larger bolts
and its a bad idea to change the bolts and not remove the head
On 8/28/2013 2:51 PM, Brent Edinger wrote:
> From: banana111@msn.com
> To: jacranwell@aol.com
> Subject: RE: [Alpines] New Head Bolts
> Date: Tue, 27 Aug 2013 19:47:01 -0700
>
>
>
>
> I couldn't find any old spare bolts around. (though I know I would never
> throw anything out that could still be used some day)
> The stock head bolts have a 3.25" length shank. If you go to the back of the
> ARP catalog
> page 89 has 7/16-14 bolts in chromoly. ARP can provide the torque application
> numbers.
> You should back out a head bolt and check how much thread is engaged into the
> block by
> measuring how high it sits when it is all the way loose. Then you can
> determine if you need a longer shank bolt.
> You will have to ream the holes up in the gasket and I think I had to open up
> a couple
> holes in the head as well so it would align properly. It's not too tough of a
> job and when it's
> done there should be no more head gasket problems.
>
> Brent
>
> From: JACranwell@aol.com
> Date: Tue, 27 Aug 2013 15:42:57 -0400
> Subject: Re: [Alpines] New Head Bolts
> To: banana111@msn.com; alpines@autox.team.net
>
>
>
>
>
>
> Hi Brent,
>
> Do you have a full spec for the bolts, e.g. length, as I may
> want to go
> this route, but do not want to remove the head before the work.
> Jules.
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