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Re: Anyone have problem with Edelbrock heads?
[Re: 451Mopar]
#1266762
07/13/12 08:31 PM
07/13/12 08:31 PM
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Joined: Nov 2008
Posts: 671 Wisconsin USA
Bill MeLater
mopar
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mopar
Joined: Nov 2008
Posts: 671
Wisconsin USA
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Quote:
Quote:
what was your thread engagement? did the break occur at the end of the bolt?
How much depth was leftover after the end of the bolt threads?
I elected to use studs, since I was going for a solid roller to get as much thread engagement as possible in the aluminum.
I was using bolts that were more than full engagement of the heli-coil, but there really is nothing for the bolt to grip onto below the helicoil because the hole was drilled for the helicoil. I don't recall the coil bind spec, but I have checked that, and that is not the problem. Anyhow, I'll fix it like I did the other side, mill it flat, install a 3/4" long Time-Sert, and add a spacer betwen the head and rocker hold down, and use the longest bolt that fits.
I may remove the other heli-coils and install the longer Time-Serts, but I'm not sure how hard it will be removing the heli-coils. I was thinking a reverse twist drill bit may do the trick?
Easiest way to remove Heli-Coils is get a pick in behind the uppermost coil and bend it in toward the hole, once you get that just grab it with a needle nose and they (un)wind right out. The only potetial problem I see is what size hole/tap do you need for the Time-Certs, will it work with the existing stands?
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