--- product_id: 624707692 title: "Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6" brand: "hromee" price: "€ 38.96" currency: EUR in_stock: true category: "Hromee" url: https://www.desertcart.fi/products/624707692-engine-air-valve-holder-and-cylinder-leakage-testing-assistant-tool store_origin: FI region: Finland --- # Pressurizes cylinder up to 110psi M12 & M14 thread compatibility Durable brass & rubber fittings Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6 **Brand:** hromee **Price:** € 38.96 **Availability:** βœ… In Stock ## Summary > πŸ”§ Lock in your engine’s performance with precision air pressure testing! ## Quick Answers - **What is this?** Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6 by hromee - **How much does it cost?** € 38.96 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/624707692-engine-air-valve-holder-and-cylinder-leakage-testing-assistant-tool) ## Best For - hromee enthusiasts ## Why This Product - Trusted hromee brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Precision Valve Hold:** Securely pressurizes cylinders to keep valves sealed without dismantling. - β€’ **Quick & Efficient Setup:** 1/4" NPT quick coupler enables fast connection to air compressors for hassle-free testing. - β€’ **Rugged Build for Longevity:** High-pressure resistant brass fittings and abrasion-proof rubber tubing ensure durability. - β€’ **Leakage Detection Made Easy:** Diagnose engine air leaks by listening for continuous air escape during compression stroke. - β€’ **Universal Fit for Gasoline Engines:** Compatible with GM Chevy LS1, LS3, LS6 and other gasoline engines using M12 or M14 spark plugs. ## Overview 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. ## Description Buy Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6: Valve Train Tools - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases ## Features - Pressurizes the cylinder to help hold valves closed with compressed air. So The oil seal of the valve can be replaced without dismantling. - When the cylinder is in the compression stroke. If the air tightness of the engine is not good enough, you can hear the continuous leakage of air. Diagnosis of damaged parts by listening to the leak position. - Used for the gasonline engine cylinder with M14 or M12 spark plug, have to move out spark plug before install this tool. It can be used for gasoline engines, such as cars, trucks, boats, motorcycles, ATVs, etc. Not to be used in diesel engine vehicles. - Adopt with durable rubber tube and brass fitting connectors, anti wear, high pressure resistance, anti corrosion and abrasion. Air pressure avoid the valve to falling into the combustion chamber. - 300Psi/20Bar pressure tube with M12 and M14 thread to NPT, install the joint on the position of the spark plug. There have a 1/4" NPT air compressor air pump quick coupler male plug for easy work. Note the working pressure range 30psi≀P≀110psi(2bar≀P≀8bar). ## Technical Specifications | Specification | Value | |---------------|-------| | 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 | ## Images ![Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6 - Image 1](https://m.media-amazon.com/images/I/61hnze3jnaL.jpg) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fi/products/624707692-engine-air-valve-holder-and-cylinder-leakage-testing-assistant-tool](https://www.desertcart.fi/products/624707692-engine-air-valve-holder-and-cylinder-leakage-testing-assistant-tool) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-07-30*