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🔧 Lock in your engine’s performance with precision air pressure testing!
The Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool is designed for gasoline engines with M12 or M14 spark plug threads, including GM Chevy LS series. It pressurizes cylinders up to 110psi to hold valves closed, enabling valve seal replacement without dismantling. Featuring durable brass fittings and abrasion-resistant rubber tubing, it offers reliable, quick diagnosis of cylinder leakage by detecting air leaks during compression strokes. Ideal for cars, trucks, boats, motorcycles, and ATVs, this tool streamlines engine maintenance with professional-grade efficiency.



| ASIN | B0CQLXV7LS |
| Best Sellers Rank | #51,146 in Automotive ( See Top 100 in Automotive ) #24 in Engine Valve Train Tools |
| Brand | Hromee |
| Customer Reviews | 4.4 4.4 out of 5 stars (200) |
| Date First Available | December 19, 2023 |
| Item Weight | 6 ounces |
| Item model number | HR4145 |
| Manufacturer | Hromee |
| Manufacturer Part Number | HR4145 |
| Model | HR4145 |
| Product Dimensions | 6 x 4 x 1.5 inches |
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