---
product_id: 651366023
title: "Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6"
brand: "hromee"
price: "$217.90"
currency: USD
in_stock: true
url: https://www.desertcart.ec/products/651366023-hromee-engine-air-valve-holder-and-cylinder-leakage-testing-assistant
store_origin: EC
region: Ecuador
---

# Up to 110psi air pressure M12 & M14 thread compatibility Durable brass & rubber build Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6

**Brand:** hromee
**Price:** $217.90
**Availability:** ✅ In Stock

## Summary

> 🛠️ Lock in engine performance with precision air pressure testing!

## Quick Answers

- **What is this?** Hromee 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?** $217.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/651366023-hromee-engine-air-valve-holder-and-cylinder-leakage-testing-assistant)

## 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

- • **Rugged & Reliable:** Constructed with anti-corrosion brass fittings and abrasion-resistant rubber tubing for long-lasting use.
- • **Precision Valve Sealing:** Pressurizes cylinders to hold valves closed, enabling valve seal replacement without dismantling.
- • **Quick & Efficient Setup:** Features 1/4" NPT quick coupler for fast air compressor connection and hassle-free testing.
- • **Leakage Detection Made Easy:** Diagnose engine air leaks by listening for continuous air escape during compression stroke.
- • **Universal Gasoline Engine Fit:** Compatible with M12 and M14 spark plug threads for cars, trucks, boats, motorcycles, and ATVs.

## Overview

The Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool is a robust diagnostic device designed for gasoline engines with M12 or M14 spark plug threads. It pressurizes cylinders up to 110psi to hold valves closed, allowing valve seal replacement without engine teardown. Built with durable brass and rubber components, it ensures corrosion resistance and high-pressure durability. Ideal for professional mechanics and DIY enthusiasts aiming for precise engine leak detection and maintenance efficiency.

## Description

Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6

## 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 |
|---------------|-------|
| Manufacturer | Hromee |
| Brand | Hromee |
| Model | HR4145 |
| Product Dimensions | 15.24 x 10.16 x 3.81 cm; 170.1 g |
| Item model number | HR4145 |
| Manufacturer Part Number | HR4145 |
| Material | Rubber, Brass |
| Assembly Required | No |
| Manufacturer | Hromee |
| Country of Origin | USA |
| Item Weight | 170 g |

## Images

![Hromee 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)

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**Shop now:** [https://www.desertcart.ec/products/651366023-hromee-engine-air-valve-holder-and-cylinder-leakage-testing-assistant](https://www.desertcart.ec/products/651366023-hromee-engine-air-valve-holder-and-cylinder-leakage-testing-assistant)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-21*