---
product_id: 624707692
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: "S$33"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/624707692-hromee-engine-air-valve-holder-and-cylinder-leakage-testing-assistant
store_origin: SG
region: Singapore
---

# Up to 110psi air pressure M12 & M14 thread compatibility Durable brass & rubber construction 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:** S$33
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it tight, diagnose right – the pro’s secret weapon!

## 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?** S$33 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/624707692-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

- • **Precision Valve Sealing:** Pressurizes cylinders to hold valves closed, enabling valve seal replacement without dismantling.
- • **Rugged & Reliable Build:** High-pressure resistant brass fittings and abrasion-proof rubber tubing ensure long-lasting durability.
- • **Quick & Convenient Setup:** 1/4" NPT quick coupler for fast air compressor connection, working pressure range 30-110psi.
- • **Leakage Detection Made Easy:** Diagnose engine air tightness by listening for continuous air leaks 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 HR4145 Engine Air Valve Holder is a precision tool 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. Featuring durable brass fittings and abrasion-resistant rubber tubing, it enables quick leakage diagnosis by detecting air escaping during compression. Ideal for cars, trucks, boats, motorcycles, and ATVs, this tool streamlines engine maintenance with a convenient quick coupler and robust construction.

## 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 |
| Item Weight | 6 ounces |
| Product Dimensions | 6 x 4 x 1.5 inches |
| Item model number | HR4145 |
| Manufacturer Part Number | HR4145 |

## 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)
![Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6 - Image 2](https://m.media-amazon.com/images/I/71HyNX3YjcL.jpg)
![Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6 - Image 3](https://m.media-amazon.com/images/I/71qfb+hC96L.jpg)
![Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6 - Image 4](https://m.media-amazon.com/images/I/71TcwHpUbUL.jpg)
![Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6 - Image 5](https://m.media-amazon.com/images/I/61iiGtTPdgL.jpg)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-05*