---
product_id: 13143690
title: "75630 Test Fluid"
brand: "lisle"
price: "R$225"
currency: BRL
in_stock: true
reviews_count: 11
category: "Lisle"
url: https://www.desertcart.com.br/products/13143690-75630-test-fluid
store_origin: BR
region: Brazil
---

# Color-change indicator 16 fl oz precision volume Compatible with Lisle 75500 Detector 75630 Test Fluid

**Brand:** lisle
**Price:** R$225
**Availability:** ✅ In Stock

## Summary

> 🔧 Detect leaks before they detect you — stay ahead with Lisle 75630!

## Quick Answers

- **What is this?** 75630 Test Fluid by lisle
- **How much does it cost?** R$225 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/13143690-75630-test-fluid)

## 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

- • **Trusted by Pros:** Top-ranked in fuel leak detectors with 4.5-star reviews, a must-have for serious engine diagnostics.
- • **Time-Saving Accuracy:** Eliminates guesswork and accelerates pinpointing head gasket and combustion leaks.
- • **Seamless Compatibility:** Designed to work flawlessly with the Lisle 75500 Combustion Leak Detector for professional-grade diagnostics.
- • **Quantifiable Leak Severity:** Gradual color change reflects leak intensity, empowering precise engine assessments.
- • **Instant Visual Leak Detection:** Fluid shifts from blue to yellow, revealing combustion leaks with undeniable clarity.

## Overview

The Lisle 75630 Test Fluid is a 16-ounce combustion leak detector fluid that changes color from blue to yellow upon exposure to combustion gases in the radiator. Engineered for use with the Lisle 75500 Combustion Leak Detector, it provides a clear, visual indication of head gasket and combustion leaks, enabling precise and time-efficient engine diagnostics favored by professionals and enthusiasts alike.

## Description

Detects Combustion Leaks on Engines. Use the leak detector fluid with the Lisle 75500 Combustion Leak Detector. Indicating fluid changes from blue to yellow when exposed to combustion gases in the radiator. Contains 16 fluid oz.

Review: Good product - Works as intended.
Review: Works like it is supposed to. - 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.

## Features

- Detects Combustion Leaks on Engines.
- Use the leak detector fluid with the Lisle 75500 Combustion Leak Detector.
- Indicating fluid changes from blue to yellow when exposed to combustion gases in the radiator.
- Contains 16 fluid oz.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000I17Z8Q |
| Best Sellers Rank | #17,344 in Automotive ( See Top 100 in Automotive ) #16 in Fuel Leak Detectors #477 in Diagnostic, Test & Measurement Tools |
| Brand | Lisle |
| Customer Reviews | 4.5 4.5 out of 5 stars (669) |
| Date First Available | July 7, 2004 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10.4 ounces |
| Item model number | 75630 |
| Manufacturer | Lisle |
| Manufacturer Part Number | 75630 |
| Model | Lisle 75630 Combustion Leak Indicating Fluid |
| Product Dimensions | 6.3 x 4.3 x 2.2 inches |

## Images

![75630 Test Fluid - Image 1](https://m.media-amazon.com/images/I/71SdNDYbJ4L.jpg)

## Available Options

This product comes in different **Style** options.

## 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

### ⭐⭐⭐⭐⭐ Good product
*by D***. on November 23, 2025*

Works as intended.

### ⭐⭐⭐⭐⭐ Works like it is supposed to.
*by A***G on July 21, 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.

### ⭐⭐⭐⭐⭐ fast shipping and product was in perfect shape
*by A***R on February 2, 2026*

item was as described and showed up on time

## Frequently Bought Together

- Lisle 75630 Test Fluid
- OEMTOOLS 37145 Combustion Leak Detector, Plastic and Rubber Tester for Engine Block Leaks, Automotive Blown Head Gasket Test, Block Test Kit

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-14*