Discount Helicoil 5334-14 Save-A-Thread Thread Repair Kit M14 x 1.25

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List Price: $42.20
Sale Price: $27.59
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We used the Helicoil Save-A-Thread M14x1.25 to do an "over the fender" repair of the spark plug thread on a 2003 Ford Expedition 5.4L V-8 with a blown spark plug. I thought I might have to buy a Time-Sert kit, but found the Helicoil version at a much lower price. The Helicoil worked very well, even though the plug was way at the back in a difficult spot under the fuel rail. The two step tap design was very easy to use and reamed and cut the larger threads no problem. I had read a few tips that really helped out: 1) load up the flutes in the tap with grease to catch the thread cuttings and also it allows you to see progress if you back out the tap a few times during the process, 2) start the engine up after tapping without the spark plug it appeared to blowout some very fine aluminum cuttings that weren't caught by the grease and 3) thread the insert on to the sparkplug and then thread the plug into the newly tapped hole. I wasn't concerned about setting the insert, since I figured I wasn't going to be changing the plug again for a long time, and it would be no big problem if the insert came out with the plug. The first set of plugs looked great after 115K miles so I figured I've got another 100K on the new plug. Some people also recommended manually advancing the engine to the point where both valves were closed for that cylinder and also using a vacuum to suck out any shavings, but I thought the grease worked well enough to not bother with the vacuum approach. The ignition coil for that plug had to be replaced because it got broken when the plug blew out, but beyond replacing that, the engine was running great with just a few hours work.

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After breaking off the spark plug on my motorcycle leaving only the threaded part I started researching how to fix it. After removing the head and drilling out the old threads I tried to re-tap the threads to no avail so it was on to a new thread insert. I wasn't thrilled with the idea of a "coil" fix was shocked when I found out the price for the coil kits so I was very excited when I found the Save-A-Thread kit with solid sleeve inserts. It worked like a charm. I had the hole expanded, re-threaded and the insert in place in less than 20 minutes. At half the price or less than the other "coil" kits I'd found the Save-A-Thread kit is a life saver.

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I used this kit on a stripped plug hole in an old Toyota 22RE.

I used the spark-plug to thread the insert in like the instructions stated.

I was then unable to remove the plug without the insert coming back out with it, therefore I was never able to use the punch tool to expand the cleats.

Right now my engine is doing fine, however in about 30,000 miles when my plug is worn out I am not sure what will happen when I go to change the plugs again.

I don't drive the truck all that much so I figure I am now in for a head replacement in about 5 years.

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I ordered this for my '99 F250 Super Duty. I ended up returning it. The reason, my mechanic showed me what he was going to use and immediately I saw these were flimsly in comparison to his thread repair kit. I'm sure it will have its use on other smaller engines, but I didn't want to take the chance.

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While on vacation in the Smokey Mountains with my family our SUV blew out a sparkplug. We made it to the nearest auto parts store to buy a HeliCoil 5334-14 and some tools. After about two hours we where back on the road. I have blown out a total of three spark plugs and have used this kit to repair each one. Just out of curiosity I checked into a new head job and I was quoted thousands. Thanks to HeliCoil I saved a lot of money.