---
product_id: 281724455
title: "Lisle 75500 Combustion Leak Detector - Automotive Diagnostic Tool"
brand: "lisle"
price: "€ 118.55"
currency: EUR
in_stock: false
reviews_count: 5
category: "Lisle"
url: https://www.desertcart.ie/products/281724455-lisle-75500-combustion-leak-detector-automotive-diagnostic-tool
store_origin: IE
region: Ireland
---

# Color-changing fluid for instant visual diagnosis Detects combustion leaks with precision Compatible with gasoline engine cooling systems Lisle 75500 Combustion Leak Detector - Automotive Diagnostic Tool

**Brand:** lisle
**Price:** € 118.55
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Spot leaks before they cost you—diagnose like a pro!

## Quick Answers

- **What is this?** Lisle 75500 Combustion Leak Detector - Automotive Diagnostic Tool by lisle
- **How much does it cost?** € 118.55 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/281724455-lisle-75500-combustion-leak-detector-automotive-diagnostic-tool)

## Best For

- lisle enthusiasts

## Why This Product

- Trusted lisle brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Setup & Use:** Simple installation on radiator or surge tank with vacuum connection—no complex tools needed
- • **Visual Color Change:** Magic fluid shifts from blue to yellow upon contact with combustion gases for easy reading
- • **Compact & Lightweight:** Weighs just 136g, making it portable and perfect for on-the-go diagnostics
- • **Instant Leak Detection:** Quickly identifies head gasket and cracked block issues before costly repairs
- • **Trusted Automotive Tool:** Highly rated by professionals with 4.4 stars from 286 users, ensuring reliability

## Overview

The Lisle 75500 Combustion Leak Detector is a precision automotive diagnostic tool designed to quickly identify combustion leaks caused by faulty head gaskets, cracked blocks, or warped heads. Using a color-changing test fluid, it provides instant visual confirmation of leaks in gasoline engine cooling systems. Lightweight and easy to use, this tool is trusted by mechanics and DIY enthusiasts alike to prevent expensive engine damage.

## Description

Combustion Leak Detector Quickly Pinpoints Combustion Leaks Checks for combustion leaks caused by bad head gaskets cracked blocks and cracked or warped heads Fluid changes from blue to yellow when exposed to combustion gases from the radiator Diesel Test fluid sold separate

Review: For a gasoline engine cooling system. May work with diesel, but I doubt it, since I believe that diesels put out less hydrocarbons. I think this company makes a diesel version of this kit. Make sure the cooling system is full, install this glass globe on the radiator opening/surge tank opening, fill with the magic mystery fluid, and connect it to a vacuum source. (Either to engine vacuum, or use a mity-vac style vacuum gun.) If there is a crack around the combustion cylinder, or a faulty head gasket, then you should see the magic mystery fluid change colour. This is just another quick way to check for combustion leaks. Other methods may be performing a cooling system pressure test, and checking for coolant on top of the pistons. Or, install a pressure test gauge on the cooling system, keep it at zero PSI, and run the engine. A bad head gasket may push pressure into the cooling system, and make the pressure gauge needle jump up. Or, perform a cylinder compression test.
Review: Funciona bien , hay que tener cuidado de no contaminar la muestra con anticongelante.

## Features

- manufacturer: Lisle
- Item Trademark: LISLE
- Item Weight: pounds, pounds, 1., 1.
- Item Category: Auto Accessory

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0007ZDRUI |
| Brand | Lisle |
| Customer Reviews | 4.4 4.4 out of 5 stars (286) |
| Date First Available | 7 August 2012 |
| Item Weight | 136 g |
| Item model number | 75500 |
| Manufacturer | Lisle |
| Manufacturer Part Number | 75500 |
| OEM Part Number | 75500 |

## Product Details

- **Brand:** Lisle
- **Item weight:** 136 g
- **Material:** Plastic, Rubber, Metal
- **Measuring range:** Anwesend - Abwesend
- **Style:** Modern

## Images

![Lisle 75500 Combustion Leak Detector - Automotive Diagnostic Tool - Image 1](https://m.media-amazon.com/images/I/71nhlrhtfzL.jpg)

## Questions & Answers

**Q: what pump can i use with it ? can you give me the picture of the pump , thank you**
A: Try ones like this: Hopkins 10803 FloTool Transfer Pump. Takes 2 hands, but otherwise cheap and effective. Comes with a hose that connects directly without fittings.

**Q: What is the difference between the diesel and gasoline combustion gas tester fluid?**
A: Did not find that particular brand to work very well for diesel. Have used other brands which are combustion chamber leak detectors which work for both gas and diesel. The difference between a gas and diesel detector would be in the chemical formulation.

**Q: I don't have a radiator cap on my radiator So will it work on my overflow? Or what would you recommend**
A: Your  car has a degas bottle. Yeah it will work on that

**Q: Can it detect co2 in coolant? What is the average for success by testing?**
A: Yes, it tests for carbon dioxide and carbon monoxide in your coolant.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***R on 16 January 2022*

For a gasoline engine cooling system. May work with diesel, but I doubt it, since I believe that diesels put out less hydrocarbons. I think this company makes a diesel version of this kit. Make sure the cooling system is full, install this glass globe on the radiator opening/surge tank opening, fill with the magic mystery fluid, and connect it to a vacuum source. (Either to engine vacuum, or use a mity-vac style vacuum gun.) If there is a crack around the combustion cylinder, or a faulty head gasket, then you should see the magic mystery fluid change colour. This is just another quick way to check for combustion leaks. Other methods may be performing a cooling system pressure test, and checking for coolant on top of the pistons. Or, install a pressure test gauge on the cooling system, keep it at zero PSI, and run the engine. A bad head gasket may push pressure into the cooling system, and make the pressure gauge needle jump up. Or, perform a cylinder compression test.

### ⭐⭐⭐⭐⭐ Review
*by E***D on 15 July 2019*

Funciona bien , hay que tener cuidado de no contaminar la muestra con anticongelante.

### ⭐⭐⭐⭐⭐ Review
*by A***G on 21 July 2010*

Used this to confirm what was pretty certain, a head gasket leak. Sure takes the guesswork and time out of detecting head gasket leaks. I was already 95% certain one or both head gaskets were leaking using cylinder compression and leakdown tests and radiator pressure test. I like the ability to shutdown a cylinder bank and test for a leaking head gasket on one head or the other. Caution, if you do this, you will most certainly trip computer codes and the engine service light on the dash. You need to be aware that you have to check that your code reader (if you have one) will reset the engine service light. Not all will. Many will clear codes but not reset engine service light so you may have to got to a shop to have light reset. Some car models can be manually reset or there is some trick to reset. One of the other anecdotal aspects of this test is that you can tell which cylinder bank is leaking faster or slower. The color change for my testing was gradual, ie it went from blue to green to yellow. This shows that the color change is relatively proportional to the amount and rate of leakage. The color change for the right bank was pretty quick and the color change for the left bank took several minutes. I ran this several times on both a hot and cold engine. The results were generally reproducible.

## Frequently Bought Together

- Lisle 75500 Combustion Leak Detector
- Stant Cooling System Tester, Metallic

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-11*