06-30-2014, 09:22 AM
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#1 (permalink)
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Cyborg ECU
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Helicoil rentals, tips, experiences?
I did a little damage to threads on one of five valve cover bolts yesterday. It seems to be maybe okay, but I could use some "off-topic tech" advice on helicoil kits in case I need one. Can you rent them? Do they all cost $250-$600 like the stuff I quick searched at O'Reilley and Autozone? Are there smaller kits known-good for my specific application (the internal threads for a 10mm bolt seating)?
Thanks!
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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06-30-2014, 12:12 PM
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#2 (permalink)
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(:
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If it's just a valve cover bolt you could probably go oversize and/or longer.
Or maybe the parts store will loan or rent the heli-coil tool. Or if you're only buying one the price should be far lower.
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06-30-2014, 12:50 PM
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#3 (permalink)
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.........................
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Quote:
Originally Posted by California98Civic
I did a little damage to threads on one of five valve cover bolts yesterday. It seems to be maybe okay, but I could use some "off-topic tech" advice on helicoil kits in case I need one. Can you rent them? Do they all cost $250-$600 like the stuff I quick searched at O'Reilley and Autozone? Are there smaller kits known-good for my specific application (the internal threads for a 10mm bolt seating)?
Thanks!
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When I did my timing belt, the tensioner bolt was over-torqued and pulled out the threads when I removed the bolt. Since there is only one bolt and if it comes loose, my engine is a boat anchor, I looked at a few different options to properly repair it.
The one I liked best was the Time-Sert kits.
Something like TIME-SERT Metric Thread Repair - M6
One kit will do five holes and comes with the drill bit and other tools needed to repair the hole. I'm not sure the kit above is the one you need, make sure you know the thread size and pitch before ordering. |
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06-30-2014, 12:58 PM
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#4 (permalink)
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Cyborg ECU
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Quote:
Originally Posted by Frank Lee
If it's just a valve cover bolt you could probably go oversize and/or longer. Or maybe the parts store will loan or rent the heli-coil tool. Or if you're only buying one the price should be far lower.
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Quote:
Originally Posted by darcane
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Awesome guys. Thanks. I was trying to solve problems, and created a new one too. That's the way of the machine and people: it either works or it breaks, I either get it right or f-it-up! 
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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06-30-2014, 02:41 PM
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#5 (permalink)
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Master EcoModder
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6X1 or 8x1.25. See if you can get just the size you need. Drill deep enough for the tap to go in as far as you need. Done a few hundred.
maybe try Lowes.
regards
Mech
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06-30-2014, 03:11 PM
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#6 (permalink)
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(:
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Sometimes another option is to loctite a stud in a hole with compromised threads and use a nut on it.
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06-30-2014, 05:12 PM
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#7 (permalink)
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Master EcoModder
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I found a Helicoil kit for one size at the hardware store once. It was about $20 or so. Another time I fixed damaged threads by cleaning and degreasing, oiling the bolt, and using Plastic Steel.
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06-30-2014, 08:12 PM
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#8 (permalink)
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Cyborg ECU
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Quote:
Originally Posted by Old Mechanic
6X1 or 8x1.25.
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6x1.0mm for the win, according to p. 6-17 in the 1996-1998 Honda FSM. Good memory, Old Mech. 
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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06-30-2014, 08:47 PM
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#9 (permalink)
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Master EcoModder
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Ive done this before. For pans and covers it can make easier to do in the future and I end up doing all the bolts.
Quote:
Originally Posted by Frank Lee
Sometimes another option is to loctite a stud in a hole with compromised threads and use a nut on it.
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06-30-2014, 09:19 PM
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#10 (permalink)
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Master EcoModder
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A heli coil is just fine for your application calcivic. Just make sure you go (drill) deep enough for the tap to cut enough threads for the helicoil without bottoming out your bolt. I might even do the drilling with the valve cover on to keep the metal out of the engine.
I'm not sure if the bolt bottoms out or has a shoulder to control its clamping force. You can pull enough torque with one finger on a 1/4 inch ratchet. It's only a few foot pounds if that much, might be inch pounds. See if the good one bottoms out and try to get the reapired one to do the same or a little more, but not less.
regards
Mech
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