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HelicopterMain Discussion › Blown glow plug and threads
12-24-2008 01:46 AM  8 years agoPost 21
Dood

rrProfessor

Wescanson

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http://www.allfasteners.com/Recoil-...p_142-3190.html

I googled "UNEF Helicoil" and this was up near the top of the page.

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12-24-2008 04:53 AM  8 years agoPost 22
FloridaHeli

rrVeteran

jacksonville,​florida

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Wow, $32.55 + shipping at www1.mscdirect.com/CGI/NNSRI...ber=432%50mode=Half the cost of a new head. Based on the comments above the helicoils don't last.

I'd look into a new head. They are $67.99 at http://www.ronlund.com/Merchant2/me..._Code=OS50HYPER when in stock. Heliproz may have them.

Good luck. If you do use the helicoil please post a follow up on how it installed and how long it lasts.

Thanks,

This hobby is WAY too expensive!!

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12-24-2008 12:24 PM  8 years agoPost 23
BarracudaHockey

rrMaster

Jacksonville FL

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Clarence Lee does it pretty cheap. If done properly they last forever.

Andy
AMA 77227
http://www.jaxrc.com

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12-24-2008 12:27 PM  8 years agoPost 24
bigdad390

rrVeteran

East. Liverpool,​Ohio

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There is no reason that a helicoil would not work unless the installer did something wrong. Go to your local automotive parts store and get a helicoil, read and follow the directions. I have been a mechanic for 30 years and have never had a helicoil fail.

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12-24-2008 12:30 PM  8 years agoPost 25
FILE IFR

rrApprentice

Anytown, USA 01234

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Clarence Lee does it pretty cheap. If done properly they last forever.
Another guy posted the same answer here too. I had it done a few months ago (from Lee Machining) for an O.S. 61 pumper... I got it back in a week and ONLY cost me around $15.

There's no way I would buy a new head at retail prices... if I didn't have to.

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12-24-2008 01:40 PM  8 years agoPost 26
airdodger

rrElite Veteran

Johnston USA

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FloridaHeli Did you look at the link I posted, two hundred fifty thousand used in every space shuttle and you think they don't work.

Chris

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12-25-2008 03:37 AM  8 years agoPost 27
Twrecks600

rrKey Veteran

Round Rock, Texas

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""http://www.allfasteners.com/Recoil-...p_142-3190.html

I googled "UNEF Helicoil" and this was up near the top of the page.""

Thanks for the link!! I am going to order that on Monday!! I have a guy here in town that has a used head that I am going to Purchase but it never hurts to have a way to make a repair on any other motor!!

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12-27-2008 11:52 PM  8 years agoPost 28
bagobitz

rrVeteran

saddleworth,lancs,UK

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Rolls Royce and other manufacturers also use "thread inserts" (Helicoil is a brand-name, like Hoover!)

Installed properly, they last. The alternative is to drill and tap to a larger size, loctite in an aluminium screw,trim flush, drilland tap with a spark-plug thread.As previously stated, you don't need a gorilla swinging on a plug, just a "nip" is sufficient.

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12-28-2008 07:49 PM  8 years agoPost 29
Dr.Ben

rrMaster

Richmond, VA, USA

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I've put in dozens helicoils on one thing or the other over the years (and two last night) and had Mr. Lee do a head for me. I've NEVER had one fail. Indeed, it is my understanding that some military specs call for them in certain applications to avoid stripping of critical parts in the field.

Ben Minor

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12-28-2008 09:44 PM  8 years agoPost 30
TMoore

rrMaster

Cookeville, TN

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Mil-Specs call for helicoils in anything that is aluminum that might be related to hydraulics actuators or other parts on board surface craft and submarines. Keenserts are also permissable.

Delayed Response Operator Not Engaged

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