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01-08-2007, 06:58 AM
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CC Member
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Join Date: Apr 2006
Location: Cincinnati,
OH
Cobra Make, Engine: 1965 Cobra, CSX2500, 1965 GT350, 1967 GT500
Posts: 83
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Not Ranked
Helicoil for Edelbrock heads, is it necessary?
Guys,
I am building a 428 with Edelbrock heads and I have read a few cases where people pull the threads/bolts out of aluminum heads. Is this a common problem? Should I have all the bolt hols helicoiled from the start?
Thanks in advance....
MC
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01-08-2007, 07:40 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
I have worked on a good assortment of machines and when we were putting cutting tools into an aluminum base, we helicoiled all the holes. Used some nasty locker type paste to bed them once installed.
Hope this adds to your confusion.  |
01-08-2007, 08:12 AM
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CC Member
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Join Date: May 2000
Location: Northern VA,
VA
Cobra Make, Engine: Classic Roadsters
Posts: 2,765
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Not Ranked
I thought that all Edelbrock heads came with all the holes helicoiled. My SB performer RPM heads came that way. It is one of the reasons that I selected Edelbrock. I think that none of the other brands of aluminum heads have this. The last thing I needed was to be torquing down on a header bolt and having all the threads strip out 
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LIFE IS TOO SHORT TO WORRY ABOUT GOOD GAS MILEAGE
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01-08-2007, 08:17 AM
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CC Member
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Join Date: Apr 2006
Location: Cincinnati,
OH
Cobra Make, Engine: 1965 Cobra, CSX2500, 1965 GT350, 1967 GT500
Posts: 83
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Not Ranked
I just checked out their website and yes, it seems that the rocker stud holes and exhaust holes are helicoiled. I guess the intake mounting is not a concern? I think I will do them as well to be safe.
Thanks,
MC
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01-08-2007, 10:52 AM
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CC Member
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Join Date: Jul 2005
Location: Virginia Beach, Va & Port Charlotte, Fl.,
Posts: 2,293
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I stripped out 3 or 4 holes for the intake on my Eboks, definately no heli-coils. Ensure you use bolts just a little longer (1/4" or so) than the stock intake bolts. It's give you that x-tra thread contact that you need.
Dave
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Too many toys?? never!
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01-08-2007, 11:08 AM
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CC Member
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Join Date: Jul 2003
Location: West Bloomfield,
MI
Cobra Make, Engine:
Posts: 717
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Not Ranked
Just as an FYI - - all Blue Thunder heads use stainless time-serts at all fastener locations, and integral hard washers at head bolt positions.
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01-08-2007, 11:33 AM
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Senior Club Cobra Member
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Join Date: Feb 2004
Cobra Make, Engine:
Posts: 1,226
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Not Ranked
My SBF Edelbrock performer heads have heli-coils in ALL holes including the intake bolt holes and sparkplug holes.
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01-08-2007, 12:11 PM
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CC Member
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Join Date: May 2000
Location: Northern VA,
VA
Cobra Make, Engine: Classic Roadsters
Posts: 2,765
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Not Ranked
Yeah, Mine too!
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LIFE IS TOO SHORT TO WORRY ABOUT GOOD GAS MILEAGE
________
Utinam logica falsa tuam philosophiam totam suffodiant!
________
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01-08-2007, 03:00 PM
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CC Member
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Join Date: Nov 2000
Location: Tucson,
Az
Cobra Make, Engine: Superformance 427 Side-Oiler
Posts: 2,156
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Not Ranked
Anti-seize!!!!!!!
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The rest of the world can have their opinion about the United States just as soon as WE give it to them.
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01-08-2007, 06:33 PM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
Quote:
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Originally Posted by SFM5S159
Guys,
I am building a 428 with Edelbrock heads and I have read a few cases where people pull the threads/bolts out of aluminum heads. Is this a common problem? Should I have all the bolt hols helicoiled from the start?
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I too had thought the aluminum Edel heads had all holes helicoiled. One thing to make sure is that you don't bottom out any bolts in the holes. I definitely would check depth before fastening down tight.
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