# KOUTIANWU Upgraded Cylinder Leak Down Tester

The KOUTIANWU Upgraded Cylinder Leak Down Tester is a petrol-engine diagnostic kit intended to measure cylinder leakage and help locate common leakage sources. Its listed adapters and air regulator support setup across specified thread sizes, but the test requires an air source and careful calibration.

- [Original product page](https://bargainpostbox.co.uk/product/koutianwu-upgraded-cylinder-leak-down-tester)
- [View offer](https://bargainpostbox.co.uk/visit/koutianwu-upgraded-cylinder-leak-down-tester)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: KOUTIANWU
- Model: Upgraded Cylinder Leak Down Tester
- Category: Cars & Motorcycles > Vehicle Diagnostic Equipment
- Price: 33.85 GBP
- Previous price: 42.32 GBP
- Discount: 20%
- Price checked: 2026-11-14T09:48:02.180Z

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Designed to measure leakage in petrol-engine cylinders and help investigate possible sources such as worn piston rings, valve wear, cylinder-head cracks or head-seal failure.
- The listing describes use on four-stroke engines and says the kit is suitable for trucks and vehicles with limited clearance.
- Setup instructions call for an air source, regulator adjustment and calibration before taking a reading.

## Pros

- Leakage measurement can help narrow down engine faults rather than only indicating a compression reading.
- The listed M14 and M16 fittings and 10mm and 12mm spark plug adapters provide several connection options.

## Specifications

### Identity
- Brand: KOUTIANWU
- Model: Upgraded Cylinder Leak Down Tester
### Dimensions and installation
- Dimensions listed: 30 x 25 x 8 centimetres
- Weight listed: 1 Kilograms
- Thread sizes: M14 x 26mm, M16 x 26mm
### Materials
- Material listed: Metal, Plastic

## Before you buy

- The instructions require an air source and removal of the Schrader valve before setup. Close the regulator, connect the hose and calibrate the leak gauge before testing. The listing does not specify an operating pressure range.

## In the box

- Cylinder leak-down tester (Included)

## A good fit for

- DIY mechanics investigating leakage in a petrol four-stroke engine.
- Work on cars, trucks or motorcycles where the listed adapter sizes fit.

## Less suited to

- Diesel-engine testing, since the listing describes petrol-engine use.
- Buyers who need a standalone tester without access to an air source.

## Frequently asked questions

### What does this kit measure?
It is described as measuring leakage in petrol-engine cylinders to help identify possible sources such as piston-ring or valve wear and cylinder-head sealing problems.
### Does it need an air supply?
Yes. The listed setup procedure connects the tester to an air source and requires regulator adjustment and gauge calibration.
### Which fittings are listed?
The listing specifies M14 and M16 fixed adapters, plus 10mm and 12mm spark plug adapters. Confirm they match the engine being tested.

## Alternative options

- [DAYUAN Cylinder Leak Down Tester Kit, Gasoline Engine leakdown Test Tool Dual Pressure Gauges Leak Test Set Compression Leakage Tester](https://bargainpostbox.co.uk/visit/koutianwu-upgraded-cylinder-leak-down-tester)
- [ZKTOOL 11PCS Engine Compression Tester Kit for Cylinder Leak Detector \| Includes 0-300 PSI 0-20 Bar Gauge Manometer, Universal Compatible for All Vehicles and Motorcycles Repair Tools](https://bargainpostbox.co.uk/visit/koutianwu-upgraded-cylinder-leak-down-tester)
- [DASBET 8PCS Petrol Engine Cylinder Compression Tester Kit \| Compression Tester kit Fuel Cylinder Pressure Gauge for Petrol Gas Engine Gauge 0-300 PSI for Cars Motorcycles](https://bargainpostbox.co.uk/visit/koutianwu-upgraded-cylinder-leak-down-tester)
- [Zoomtools Cylinder Leak Down Tester Tool Kit;Petrol Engine Compression Test Kit with Extension Rod;Dual Gauges Leakdown Detector Set for Pressure Check and Leakage Rate Testing of Cars,Motorcycles](https://bargainpostbox.co.uk/visit/koutianwu-upgraded-cylinder-leak-down-tester)
- [Draper 7 Piece Cylinder Leakage Tool Kit](https://bargainpostbox.co.uk/visit/koutianwu-upgraded-cylinder-leak-down-tester)
- [DHA Cylinder Leak Down Tester Kit \| Gasoline Engine leakdown Test Tool Dual Pressure Gauges Leak Test Set Compression Leakage Tester](https://bargainpostbox.co.uk/visit/koutianwu-upgraded-cylinder-leak-down-tester)

## Images

![KOUTIANWU Upgraded Cylinder Leak Down Tester — 1](https://bargainpostbox.co.uk/i/FjCIflAbfm4JRrKgCp2YCqaIo7Sw_aR-oQ46_pOydmtNP0nLW9VTUmksP7lGN3vsgIHhvCniJ-Re6Sc1MPxeK6TJoKibbx_nfzBJvbukKJM_OLy_i7D1.jpg)

![KOUTIANWU Upgraded Cylinder Leak Down Tester — 2](https://bargainpostbox.co.uk/i/WuGOIfcoyNWqiNPMpVJSdnQM4WzrJY3Ud-kjx2ivTo1bMIP7igREMzFHzwyU8lHGi5HNSl6qwv-cb0QnR3svEHpiEM420XsLCNs5er1NtNGOfs6dwIGU.jpg)

![KOUTIANWU Upgraded Cylinder Leak Down Tester — 3](https://bargainpostbox.co.uk/i/KDu0J47Pz0XefiQRbT6lz5v5ep7G5HK-FHJdOj5W-U_qJlndKn-gIfY3bwxl-rRgzcHtaLTQs5JopcbetE19I_NiOmkVfNrE7SCEkxdbksE8mhw8A4aU.jpg)

![KOUTIANWU Upgraded Cylinder Leak Down Tester — 4](https://bargainpostbox.co.uk/i/V8Jpk5_nkEWtgeVcGH_gN4_slKNp09kn7ZAa932588J66BUdMxHFsh02_6pQzLAea1CqrRLu4J5SPJbZGxgKbX7AlmZa8mqjoHN7kEC-4gFlI58SKg9j.jpg)

![KOUTIANWU Upgraded Cylinder Leak Down Tester — 5](https://bargainpostbox.co.uk/i/z1SLAZ52JgAdEABIyCptF09Sl4jgbL4Kiku5NDsAaw6NweL1pBVVLs8_cKRL002-R7QSXxJ-jfpJKvZPHaZFVFBvZGWjEn-rbyrsHApMS2L3xibLWO36.jpg)

![KOUTIANWU Upgraded Cylinder Leak Down Tester — 6](https://bargainpostbox.co.uk/i/54KsSusD3SFXSh_2wtICFpsHgLGb36kRL1faaAesOicHAKB-P0ex5ayFgYcaQuu6vj5kNirMWWQe994p6n_jvSyPTdQX8yRsa5MMJHwXImeHIhAgoXKj.jpg)