Lisle 22100 Flywheel Locking Tool for 6.6 L Duramax

It worked great, I removed the small metal cover on my transmission housing on the driver side and installed the locking tool, I duck taped the truck keys to the locking tool area to make sure I removed the locking tool before starting the truck. I also removed the starter and stuck a 3/8 extension through the starter hole into the flywheel to help hold down the fly wheel even better. After removing the fan, I placed a piece of cardboard behind the radiator to protect it, I used the socket with a breaker bar and a thick pipe over the breaker bar for more leverage and the crank bolt loosened up. It takes some effort, but it’s possible. Make sure to replace the oem crank bolt, as they are a one time use. Also make sure you find the specific torque spec for the crank bolt, it goes on there tight

This tool easily pays for itself ... I had to change out the water pump on my 2005 GMC 2500HD with the 6.6 litre Duramax motor. The job requires you to pull the harmonic balancer which requires you to break free the 36mm 12 point bolt (may require up to 500 ft. lbs to braek it loss - despite the fact it only needs to be tightened to 260 ft lbs). Without this tool, many recommend pulling the starter and jamming something in to the fly wheel to hold the motor while breaking free that bolt - this entails a sh_t load of extra work ... this tool eliminate all of that. Just remove the little metal inspection plate on the left underside of the bell housing and slip the tool in there. Make sure it is seated properly, then break free the main pulley bolt ... easily (with the help of a long leverage bar)! Same tool is used to tighten that bolt to the 260 ft. lbs. spec! Well worth it and you get the 36mm 12 pt socket with the tool (which would cost roughly $10 at a parts store anyway!). Hope this helps and good luck on your water pump job (the tool will save you about an hours worth of work).

I wasn't sure because it was so cheap, but I needed this part and had already spent enough on the water pump. Way easier and faster than the engine crank method. The flywheel lock tool and socket did not break and got the horrible job done. It made it a little easier without risking any damage. I highly recommend this if you are changing your own water pump on a duramax. This was perfect for my LBZ.

Essential tool set for anyone removing flexplate on duramax. My LBZ wouldn't hold to get enough force to break the bolts loose until this set arrived. Had a chewed up rear engine plate that the one lock did find a solution. Worth the cash,even if used only once. Thanks

If you work on trucks powered by a Duramax Diesel engine then this tool is a must have for your tool box. Makes locking the flex plate super simple for doing various repairs on the engine. This tool allows you to lock the engine in place by inserting the lock into the teeth of the flex plate through the panel under the transmission, then using the 12 point socket to remove the bolt on the crank pulley. Having this tool makes a difficult task much easier. Tip: Leave yourself a reminder note to remove the lock before attempting to start the engine! (I can verify that it fits the LB7, LLY & LBZ engines. I've never used it on anything newer but I've been told it fits all models.)

This tool was exactly the tool I needed. All of the components for my LB7 worked as advertised. You will need a way to drive the socket. It is a 3/4" drive. For me (LB7) the flywheel clamp worked just fine. The trick seems to be in removing that flywheel clamp when you're done. For me this required two people. One to wiggle the crank, the other to keep a little pressure on the clamp such that it would come out once the pressure is removed. Don't forget to put your flywheel inspection cover plate back on!

If you are doing a water pump on your Duramax...save yourself the headache of trying to wedge something into the flywheel to hold it. For the price of this tool it is WELL worth the purchase. 1 min to pull the inspection cover and slide the tool in place...then you are ready to break the crank bolt loose. (comes with the socket - and it is a high quality socket). If you do not have a serious 3/4 breaker bar...it is going to be a challenge to break this loose. I used a 40" 3/4 breaker bar that I purchased on amazon. I am 6'3" and 225 lbs and it took about everything I had to break it loose. Buy the right tools and save a bunch of time! the brand breaker bar I got was TEKTON - was very happy with it...

Had to replace the water pump in my Duramax. This is a necessary tool if you want to do it correctly and efficiently.

Works well

Had my water pump off in minutes once I got my bolt out, tools worked great perfect fit

Worked easily and flawlessly.

It works, quality is ok. For the price it's good

This worked well for me. Was easy to un bolt the balancer.