Lisle 20020 Limited Access Spark Plug

Worked perfectly on my SCAG Tiger Cub

I'd inherited a Toro z4200, and when I went to replace the spark plug it would seize halfway on entry. It still worked, but I looked at the old one and noticed it was only in halfway as well. Someone, at some point, had to of messed up the threads inside. I looked, and they were bunked. No clue what to do, I mean it worked, but it should be able to insert fully. Is this something I need to take to a repair shop? Will it cause issues? I didn't want to bore it out and use one of the kits that you had to insert the extra piece, pretty sure I'd screw that up and make things worse. So I found this tracer, and ordered it with the Loctite 37539 Silver-Grade Anti-Seize Lubricant Tube - 1 oz. as it said 'Important: Use Anti Seize" in the description. It arrived today. I removed it and the lube from their packages and put some lube on the tracer. I removed my old spark plug that was half inserted, then used a ratchet attachment on my impact drill and slowly ran this through the treads, backed it out, and ran it through again. I wiped up any excess lube, blew out the hole with an air compressor, and put the spark plug, now completely in place, back into the hole. It was that easy, maybe took 5 minutes from opening the package to having fixed spark plug threads. You're most likely not supposed to use an impact drill, but I was careful and it worked out great. That way I didn't really have to fight with it at all tugging on a ratchet. Now the mower connection with the spark plug is so good that I don't even need to put the throttle in choke to start the mower, just turn the key, even on turtle, and it's over in like half a second. This is a great product, and was worth the 5 bucks any day.

2001 maxima. 240k miles on it and the threads were terrible as you can see in the old plugs. I used some grease and slowly ran it thru the threads in the head back and forth. Id run it a few threads reverse and clean it. Repeat till I got it running smooth. then i cleaned up one of the old plugs with some copper antiseaze. Ran it thru each to get the threads in the head a good coating. then installed new plugs that went in like hot butter. I'm so happy this worked as I was scared of cross-threading and needing a Heli-coil. highly recommend this tool. Take your time do it by feel to get started. I would just turn the extension and only put a stubby ratchet on after i was able to make a few rotations with the extension alone.

This is my first time chasing spark plug threads, and I initially had what seems to be a more common style of chaser ordered - the one with two different sides, and two different sizes of chasers that looks to be guided by a deep well socket - but it struck me that this style with a good socket extension might be a more accurate indication of the angle I was trying to apply it with. And that seemed to be the case when I used it in practice. Like other people have suggested, I used grease in the recesses to catch the shavings or whatever grit/carbon the chaser was catching. I cleaned that grease out of the recesses and replaced it each time for each plug hole. Very happy with my purchase. This truck has 236,000 miles on it, and when taking out the plugs - while some of them were stuck - some of them, the rear most two, were loose. I thought about this for a long time, and I feel that the prior person working on the truck to put the spark plugs in (they were high quality plugs) probably hit false tightnesses from not chasing out the threads, thought those rear most two plugs were tight enough, and finished the job that way. Over time, whatever that technician felt as being tight had worn away or melted away, and it left those two spark plugs dangerously loose. To be honest, I believe that the one plug was only held in place by being welded to the spark plug wire boot. I did not need a ratchet to remove it. So now that I have chased the spark plug threads, I feel that the spark plugs are fully seated and tight against the steel of the heads.

Great tool. I have a 5.4L V8 and the rear spark plugs are difficult to access. I applied anti-Seize to the thread chaser, which removed the metal shavings to prevent them from falling down into the engine when I put in the new plugs. I also thought I cross-threaded a plug, so I used this chaser for piece of mind. A high-quality tool, this thread chaser will outlast me.

I mangled the threads on my Honda compressor motor not realizing that it inserted at an ever so slight angle. This tool helped me figure that out and fix the problem well enough that my new plug went right in and it started on about the third pull. Don't forget the anti seize.

Works great just didn’t work for my application super durable

car was making a whistling noise, finally figured out it was coming from the spark plugs, so I pulled them and re-threaded with this, the tool worked but it was really uncomfortable for me to use so much "force" required to chase the threads, I get really nervous with working on aluminum heads, not sure how that helps you but be aware you will need to use some lube or antiseize on the threads and be "patient" it takes some finese to get it started without cross threading, make sure you already have the lube or antiseize before your order or add it to the order when getting this, one tip, you may want to get some "bore" brushes also, you don't' want any debris or lube left behind, you can just pull your "coil" wire or crank without the plug wires attached to blow everything out when done