[Fot] Carrillo TR3-4 rods torquing

[Duncan Charlton]

Can't stretch be determined with calipers, using before and after
measurements?
Duncan

On Aug 15, 2011, at 4:42 PM, Scott janzen wrote:

> Carrillo told me they could be re-used 'infinitely' if they were not
> over-torqued.  The only way to know if they have been is with a stretch
gauge,
> however.
>
> Sent from my iPhone
>
> On Aug 15, 2011, at 5:31 PM, Alexandre Camoletti <ac at camoletti.ch> wrote:
>
>> Thank you Scott !
>>
>> Indeed the rods came with the Loctite heavy duty anti seize paste (which
is
> similar in feel to the Permatex anti-seize, but darker in colour) and not
so
> slippery (certainly less than oil and even more than ARPbs lube which is
the
> slipperiest stuff in circulation).
>>
>> I do not have a stretch gauge, but this would be ideal of course.
>>
>> In absence of gauge, Carrillo recommends torqueing to a max of 40lbs the
3/8
> WMC (H11) bolts, such as the ones on TR4 rods.
>>
>> Does the torque of these bolts need to be checked from time to time?
>>
>> Can these bolts be reused/torqued several times?
>> Thank you !
>>
>> Cheers
>>
>> Alex
>>
>>
>>
>> De : Scott Janzen [mailto:sjanzen at me.com]
>> EnvoyC) : lundi 15 aoC;t 2011 23:23
>> C : Alexandre Camoletti
>> Cc : fot at autox.team.net
>> Objet : Re: [Fot] Carrillo TR3-4 rods torquing
>>
>>
>>
>> These bolts are typically a much smaller cross-section, high strength
> material relative to stock bolts (to keep the rotating weight down) and the
> required torque is lower.  The bolts on the Carillo rods on my GT6 get only
> about 25 lb of torque - probably smaller ones than on your TR4.  Read the
> instructions carefully - Carrillo specifies what type of lubricant to use
on
> them at a certain torque (I think some sort of loctite).  I once used ARP
> lube, thinking it was interchangeable.  The ARP lube is much more slippery
and
> the bolts were over-torqued.  You might try using a bolt stretch dial
> indicator instead of tightening them to a torque setting.
>>
>>
>>
>> Why is this important?  Those fancy little bolts cost about $30 each if
you
> over-stretch one!
>>
>>
>>
>> On Aug 15, 2011, at 5:04 PM, Alexandre Camoletti wrote:
>>
>>
>>
>> Amici ! Currently building a TR3/4 engine with Carrillo rods.
>>
>> The set came with the stock Carrillo bolts (called by them WMC/H11) and
the
>> tech sheet says they must be torqued max 40lbs.
>>
>> While the stock rods and bolts usually are torqued at 60 lbs.
>>
>> So should I torque the Carrillos at 40 or 60 lbs then ?
>>
>> Amici, thank you for your very valuable input (as always)!
>>
>> Cheers
>>
>> Alex
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