[TR] [Fot] TR-3/4 main cap bolts / ARP

J.C. Hassall jhassall at blacksburg.net
Wed Jan 13 19:23:53 MST 2010


On 1/13/2010 5:43 PM, J.C. Hassall wrote:
> ARP bolts for the TR4 mains are HAR 3.500-5, while the washers are
> 200-8513.
>
> For folks who haven't used ARP hardware before, they recommend cycling
> (torque/loosen) new hardware 5 times before the final torque.
>
> jim
>
>    
Crap, I meant to mention that the 5 cycle issue is only for the first time ARP hardware is used with old threads.  Also, the torque for the mains is 95 lb-ft.

jim

>> --- On *Tue, 1/12/10, J.C. Hassall /<jhassall at blacksburg.net>/* wrote:
>>
>>
>>      From: J.C. Hassall<jhassall at blacksburg.net>
>>      Subject: Re: [TR] TR-3/4 main cap bolts / ARP
>>      To: "Tony Drews"<tony at tonydrews.com>
>>      Cc: Triumphs at autox.team.net, jhassall at vt.edu
>>      Date: Tuesday, January 12, 2010, 11:09 PM
>>
>>      On 1/12/2010 10:52 PM, Tony Drews wrote:
>>      >  Anyone have info on dimensions for TR-4 main cap bolts?  The
>>      manual shows 1/2" UNC but not the length.  I'm trying to figure
>>      out what ARP bolts you would buy to replace the stock bolts, and
>>      also one that's 1/2" longer to allow for "strapping" the center
>>      main.  If I had the dimensions (length) I could try to cross
>>      reference the engines that ARP lists main cap bolts for.
>>
>>      Tony, 3.5 inches under the head.  I can give you the ARP number
>>      tomorrow, but don't have access to my build log right now.
>>
>>      jim
>>
>>      

-- 
Jim Hassall
Blacksburg VA
'63 TR4 in autox preparation
99% finished, 90% to go


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