---
product_id: 41261913
title: "BT-600 Replacement Combustion Leak Test Fluid 16 oz"
brand: "block tester"
price: "$51"
currency: NZD
in_stock: false
reviews_count: 8
url: https://www.desertcart.nz/products/41261913-bt-600-replacement-combustion-leak-test-fluid-16-oz
store_origin: NZ
region: New Zealand
---

# Compatible with gas, diesel & alternative fuels Detects leaks via color change (blue to yellow) 16 oz / 474 ml fluid volume BT-600 Replacement Combustion Leak Test Fluid 16 oz

**Brand:** block tester
**Price:** $51
**Availability:** ❌ Out of Stock

## Summary

> 🔍 Detect leaks before they detect you — stay ahead with BT-600!

## Quick Answers

- **What is this?** BT-600 Replacement Combustion Leak Test Fluid 16 oz by block tester
- **How much does it cost?** $51 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/41261913-bt-600-replacement-combustion-leak-test-fluid-16-oz)

## Best For

- block tester enthusiasts

## Why This Product

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

## Key Features

- • **Bulk Testing Capacity:** Generous 16 oz bottle supports up to 16 tests, ensuring long-lasting reliability for your Block Tester.
- • **Peace of Mind Guarantee:** Eliminate guesswork on head gasket issues and avoid costly repairs with definitive hydrocarbon detection.
- • **Multi-Fuel Compatibility:** Works seamlessly with gas, diesel, propane, CNG, and other alternative fuels—one fluid for all your engines.
- • **Precision Leak Detection:** Confirms combustion leaks with a clear blue-to-yellow indicator for instant diagnostics.
- • **Trusted by Professionals:** Highly rated with 4.8 stars and a top choice for automotive leak detection—join thousands who rely on it.

## Overview

The BT-600 Replacement Combustion Leak Test Fluid is a 16-ounce solution designed for use with Block Tester and similar fluid-based combustion leak testers. It detects combustion leaks by changing color from blue to yellow when hydrocarbons are present, compatible with gas, diesel, propane, CNG, and other alternative fuels. Ideal for up to 16 tests, it provides reliable, professional-grade diagnostics to confirm head gasket integrity and prevent costly engine damage.

## Description

Block Tester BT-600 Replacement Combustion Leak Test Fluid 16 Oz

Review: You're paying for peace of mind. - You're paying for the peace of mind you'll have, it will confirm whether or not you truly have a blown headgasket. Some cars (looking at you BMW) like to overheat even when the headgasket is not blown, so this is an essential tool for being able to say 100% that you have hydrocarbons in your coolant. The hydrocarbons are what this detects, and exhaust gasses create them. If the headgasket is intact, you won't have hydrocarbons in your coolant. So it's a pretty darn good test. I was able to use this on a car that ran fine, showed no issues, but slightly overheated at red lights. It confirmed that the headgasket is indeed blown and will save me tons of time and money.
Review: Good - Need it for my tester

## Features

- 16 ounces / 474 ml (good for 16 tests in Block Tester brand combustion leak tester)
- Use in Block Tester brand combustion leak tester or other fluid-based leak testers
- Works with GAS or DIESEL engines as well as propane, CNG, and other alternative fuels
- When fluid turns from BLUE to YELLOW combustion leak is present

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06WLKWB8T |
| Best Sellers Rank | #173,761 in Automotive ( See Top 100 in Automotive ) #77 in Fuel Leak Detectors |
| Brand | Block Tester |
| Customer Reviews | 4.8 4.8 out of 5 stars (409) |
| Date First Available | February 13, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.01 ounces |
| Item model number | BT-600 |
| Manufacturer | Block Tester |
| Manufacturer Part Number | BT-600 |
| Model | BT-612 |
| Product Dimensions | 2.75 x 2.75 x 7.13 inches |

## Images

![BT-600 Replacement Combustion Leak Test Fluid 16 oz - Image 1](https://m.media-amazon.com/images/I/511fLS-pUBL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ You're paying for peace of mind.
*by D***G on July 1, 2024*

You're paying for the peace of mind you'll have, it will confirm whether or not you truly have a blown headgasket. Some cars (looking at you BMW) like to overheat even when the headgasket is not blown, so this is an essential tool for being able to say 100% that you have hydrocarbons in your coolant. The hydrocarbons are what this detects, and exhaust gasses create them. If the headgasket is intact, you won't have hydrocarbons in your coolant. So it's a pretty darn good test. I was able to use this on a car that ran fine, showed no issues, but slightly overheated at red lights. It confirmed that the headgasket is indeed blown and will save me tons of time and money.

### ⭐⭐⭐⭐⭐ Good
*by D***Y on September 11, 2025*

Need it for my tester

### ⭐⭐⭐⭐⭐ Easy to use and most of the time it’s accurate.
*by T***R on April 14, 2025*

Not much to say. It show up a bad head gasket if you have the proper suction device.

## Frequently Bought Together

- Block Tester BT-600 Replacement Combustion Leak Test Fluid 16 oz
- OEMTOOLS 37145 Combustion Leak Detector, Plastic and Rubber Tester for Engine Block Leaks, Automotive Blown Head Gasket Test, Block Test Kit
- RELD Head Gasket Tester Kit Combustion Leak Detector for 50 Tests

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**Shop now:** [https://www.desertcart.nz/products/41261913-bt-600-replacement-combustion-leak-test-fluid-16-oz](https://www.desertcart.nz/products/41261913-bt-600-replacement-combustion-leak-test-fluid-16-oz)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-01-25*