






🔧 Unlock precision power – adjust like a pro, every time!
The Powerbuilt 10mm Jam Nut Valve Adjustment Tool is a specialized wrench designed for precise valve clearance adjustments on popular Japanese engines including Honda, VTEC, Toyota, and Nissan. Featuring a unique cutaway window for visual alignment and 7.5-inch handles for enhanced leverage, this tool simplifies tight jam nut loosening and ensures professional-grade accuracy. Lightweight yet durable, it comes with detailed instructions and photos, making it an essential addition for any serious DIY mechanic or professional technician.







| ASIN | B073WH1DBZ |
| Amazon Bestseller | #1,274,332 in Automotive ( See Top 100 in Automotive ) #11,646 in Powersports Tool Sets |
| Brand | Powerbuilt |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,237) |
| Date First Available | November 9, 2022 |
| Item Dimensions L x W x H | 5.1 x 7 x 37.2 cm |
| Item Weight | 259 g |
| Item model number | 648827 |
| Manufacturer | Powerbuilt |
| Product Dimensions | 5.08 x 6.99 x 37.21 cm; 259 g |
C**O
Great product and good quality for the price. I had a leaking valve cover gasket on our '14 Accord and thought I would check the valve clearance while I had the valve cover off. I purchased this tool ahead of time and I'm glad that I did. The valves did need to be adjusted and there are 16 valves to do. Some valves took several adjustments to get in spec and I went though the procedure twice to double check them all. The job can be done with a screwdriver and a 10mm wrench, but this worked so well and easy. I didn't have to worry about stripping the screw head or the locking nut and I was able to get good torque on the nuts. Recommended if you have a valve adjustment to do.
R**P
The right tool for the job. Worked great.
L**Y
Worked as it should
J**N
I would recommend this tool when doing a valve adjustment. Instead of using 2 tools, it's built into one for easy adjustments on the fly. I did my first valve adjustment and this tool was a life saver. I think the process would have taken a lot longer without it. The tool looks sturdy and it would likely last a long time. Two thumbs up for me.
J**9
Worked well for valve adjustments for it makes task easier. Good quality.
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