That's really very cool that you have a machinest that is helpful. I hope
you remember to have the big end resized after you increase the torque cause
the big end will definatly be out of round.
----- Original Message -----
From: Henry Frye <thefryes@iconn.net>
To: R. Kastner <kaskas@earthlink.net>
Cc: <fot@autox.team.net>
Sent: Wednesday, March 22, 2000 5:13 AM
Subject: Re: A couple questions
> Kas,
>
> Thanks for the great information. My machinist called Carillo, the rod
> bolts I found in this engine are the best Carillo makes, their torque
chart
> says the bolt can 100 ft lbs of torque. We were a bit leary of the stock
> rod taking that kind of torque, so the shop tested the bolt in the rod. At
> 80 there was no stretch at all. At 90, they measured .006 stretch, so I am
> going to torque them at 90 ft lbs. The machinist gave me a packet of
> special grease to use on the threads, as a bolt that size under that much
> torque will not torque up properly due to the friction on the threads
using
> regular oil.
>
> No wonder one of these bolts was loose when I tore down the engine. There
> is no way the other 7 bolts that were still under torque were even close
to
> 90 ft lbs.
>
> The machinist also agreed with your initial run in procedure, almost to
the
> letter. I always thought you ran in a cam and tappets at about 2500 for 20
> minutes. His explanation was that is too fast, it will bring up the
> temperature on the tappets and cam lobes too quickly, and will effect the
> hardening on the cam and tappets as they are seating. He also emphasized
> 1500 rpm's and NO BLIPPING THE THROTTLE. I wonder why I never read this
> before. Now I'm curious about those engines I did not follow this advice
on!
>
> So, assuming all goes to plan I should have this engine back in the car
> tomorrow. I think I'll be pretty much broken in by the time I make it from
> Connecticut to California to pick you up! Especially after trying to
> outrun a few Police Cruisers after they see an unmuffled yellow streak go
> by! Where are we going? ;-)
>
> In all seriousness, thanks again for all your help. Your involvement here
> means a lot of all of us!
>
> At 09:22 AM 3/21/00 -0800, R. Kastner wrote:
> >I have had a lot of experience with loose con rod bolts in the early days
> >of Triumph engine modification. You were just a very short step from
having
> >that rod out the side of the block. The fretting you see on the surfaces
of
> >the rod are from the cap MOVING around due to the clamping not being high
> >enough. I went to larger ( in your case Carillo) rod bolts that were
very
> >hard and therefore did not stretch, then increasing the torque to 60
pounds
> >instead of 45. When I did this I first took a small amount off each side
of
> >the rod surfaces, then drilled out and tapped for the larger bolt, then
> >tightened to the new torque value, then had the rod bored to the stock
> >diameter to make it round again. When after this everything stayed
togeather
> >and never had another loose bolt or block ruined becuase of rod cap
comming
> >loose. On the break-in of the new engine my suggestion and the method I
> >follwed is as follows: Bring up the oil pressure by removing the
distributor
> >and bringing up the oil pressure by spinning the oil pump with a speed
> >handle until the oil was fully circulated, replace the distributor, set
the
> >timing staticly, then fire up and hold the idle steady to 1500 RPM DO
NOT
> >BLIP THE THROTTLE DURING THE TIME. Keep this idle speed for about three
> >minutes, reduce the speed to normal idle for a couple minutes. Shut off
> >check for leaks etc, fire up and do the same thing again, DO NOT BLIP THE
> >THROTTLE. after a couple minutes more of high idle you ready for a drive.
I
> >figured about ten minutes of driving was either going to seat the rings
or
> >scuff them. They always seated. I set the revs to under 4000 durinmg this
> >period. After that come and get me. The blippingthe throttle on first
start
> >by the way is the quickest way in the world to scrore the camshaft and
the
> >cam followers. But that is only how I did it....."your mileage may
differ"
> >Kas
>
>
>
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