You're Cordially Invited: New movie
£21.99
FREE Returns
FREE delivery Wednesday, 12 February on your first order to UK or Ireland. Details
Or fastest delivery Tomorrow, 10 February. Order within 5 hrs 22 mins. Details
In stock
££21.99 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
££21.99
Subtotal
Initial payment breakdown
Delivery cost, delivery date and order total (including tax) shown at checkout.
Dispatches from
Amazon
Amazon
Dispatches from
Amazon
Returns
Returnable within 30 days of receipt
Returnable within 30 days of receipt
Item can be returned in its original condition for a full refund within 30 days of receipt
Read full Amazon return policy
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Product Safety

  • Safety data sheet available on request.

RELD Cylinder Head Gasket Tester Kit CO2 Combustion Leak Gas Test Universal for All Cars and Motorcycles Petrol Diesel Block Rapid Engine Leak Detector for 50 Tests

4.5 4.5 out of 5 stars 5,559 ratings
£21.99 with 21 percent savings
RRP: £27.99
FREE Returns
on any 4 Qualifying items | Terms
{"desktop_buybox_group_1":[{"displayPrice":"£21.99","priceAmount":21.99,"currencySymbol":"£","integerValue":"21","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"WNSOqi3riOyFmsAYF6eqWy7y6Ryz8Okc%2BucagvcNaE7R%2FOXr9Efi5aZGqYwh781aw%2BLUfykcLuOHyPT7kfFTAK3mVTvaBU9yxM476qBHIpR0GF1TMvP4jGFyfLnDTdOZ9RUE9SqXavB9ezeCyf7WyWo1jQuckioHh9BTm5NrlPzQ6MxS2176W7V10hYW%2BP9L","locale":"en-GB","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}]}

Purchase options and add-ons

Brand RELD
Style Classic
Colour Multicoloured
Product dimensions 17D x 9W x 5H centimetres
Item weight 240 Grams
Alarm Visual
Operating humidity 90 percent
Global Trade Identification Number 05907440789067
Manufacturer RELD

About this item

  • ✅The original cylindrical tester of the reputable brand 'Reld'
  • ✅Produced in the European Union. The efficiency is 99.9%.
  • ✅Fast and convenient. Most importantly you can check whether the gasket under the head of your car is fully functional without visiting the mechanic.
  • ✅If the gasket under the cylinder head looks damaged, you can check it yourself and save time and money.
  • ✅Thanks to the universal adapter with a wide measuring range (25-55 mm), we can check among other things: cars, trucks, road tractors, excavators, motorcycles, forklifts.

Buy it with

RELD Cylinder Head Gasket Tester Kit CO2 Combustion Leak Gas Test Universal for All Cars and Motorcycles Petrol Diesel Block
This item: RELD Cylinder Head Gasket Tester Kit CO2 Combustion Leak Gas Test Universal for All Cars and Motorcycles Petrol Diesel Block Rapid Engine Leak Detector for 50 Tests
£21.99
Get it as soon as Wednesday, Feb 12
In stock
Sold by EURAKOP-UK and sent from Amazon Fulfillment.
+
GOTLUCK 28PCS Cooling System Radiator Pressure Tester Kit,Vacuum Type Cooling System Kit,Universal Radiator Pressure Tester K
£66.99
Get it as soon as Wednesday, Feb 12
In stock
Sold by EU-LULU and sent from Amazon Fulfillment.
+
Block Tester BT-500 Combustion Leak Test Kit
£39.99
In stock
Sent from and sold by Sussex Marine Supplies.
Total price: $00
To see our price, add these items to your basket.
Details
Added to Basket
spCSRF_Treatment
These items are dispatched from and sold by different sellers.
Show details Hide details
Choose items to buy together.

Product Description

reld
reld
reld
reld
reld
reld 100ml
RELD Cylinder Head Gasket Tester Kit CO2 Leak Gas Test 100ml/ 3.51 fl oz
reld 1l
RELD Cylinder Head Gasket Tester Kit CO2 Leak Gas Test 1000ml 1L/ 35.1 fl oz
reld skrzynka
RELD Cylinder Head Gasket Tester Kit CO2 Leak Gas Test 500 ml/ 17.6 fl oz
reld 5l
RELD Cylinder Head Gasket Tester Kit CO2 Leak Gas Test 5000 ml 5L/ 176 fl oz
Buying Options
Customer Reviews
4.5 out of 5 stars
5,559
4.3 out of 5 stars
127
4.3 out of 5 stars
526
5.0 out of 5 stars
1
Price £21.99 £25.99 £43.99 —
Capacity 100ml/ 3.4 fl oz 1000ml / 35.1 fl oz 500 ml/ 17.6 fl oz 5000 ml/ 176 fl oz
Accessories Universal adapter X Box, Universal adapter, Bayonet adapter (diameter - 40, 47 i 55 mm) X

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Regardless of your statutory right of withdrawal, you enjoy a 30-day right of return for many products. For exceptions and conditions, see Return details.

Feedback

RELD Cylinder Head Gasket Tester Kit CO2 Combustion Leak Gas Test Universal for All Cars and Motorcycles Petrol Diesel Block Rapid Engine Leak Detector for 50 Tests

Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?
/
/
/
/
Please sign in to provide feedback.

Looking for specific info?

Product Safety

This product is subject to specific safety warnings

  • Safety data sheet available on request.

Customer reviews

4.5 out of 5 stars
5,559 global ratings

Review this product

Share your thoughts with other customers
Write a customer review

Customers say

Customers find the gas smoke fire alarm easy to use and functional. They appreciate its value for money, test quality, and head gasket leak detection. However, some customers have issues with the color change and seal.

AI-generated from the text of customer reviews

Select to learn more
Ease of useFunctionalityValue for moneyTest qualityHead gasket leak detectionSpeedColor changeSeal
42 customers mention ‘Ease of use’40 positive2 negative

Customers find the product easy to use. They say it's basic and fair quality, but it detects coolant faults. It works with an expansion tank and is a handy piece of equipment.

"Used this to diagnose a head gasket failure on a Honda goldwing. Very easy to use." Read more

"...was a lot cheaper than competitors product but it works and is very simple to use diagnosing a failing head gasket before I stripped down the engine" Read more

"...In summary a really useful kit, very easy to use and in my experience 100% accurate." Read more

"Excellent easy to use" Read more

36 customers mention ‘Functionality’30 positive6 negative

Customers find the product useful and providing clear results. They find it easy to use and a good value.

"...This simple but effective product saves all of this...." Read more

"This kit works perfectly, showed that my head gasket was faulty, with no doubt about results." Read more

"Product worked well and gave me a quick and clear result" Read more

"Works ok. Just be sure you let it settle as can go back to blue. Engine must be up to temperature For result." Read more

28 customers mention ‘Value for money’22 positive6 negative

Customers appreciate the value for money of the product. They find it useful and say it saves them time and money.

"It was very easy to set up and use. It saves a lot of time, effort and costs...." Read more

"It done what it said it does. Put my mind at rest and saved me £100s" Read more

"This is a cheap and cheerful way to test but works as required Thankyou ." Read more

"...would be a good test to do on any car someone buys as head gasket replacement is very costly." Read more

13 customers mention ‘Test quality’13 positive0 negative

Customers like the test quality of the product. They say it's an excellent test kit with clear instructions and is easy to use. The product is described as a great little unit that puts their mind at rest when buying an older car and is great as an emergency checker.

"...In summary a really useful kit, very easy to use and in my experience 100% accurate." Read more

"A very quick and simple test. I can only assume the test was correct, but it helped to take any concern out of mind...." Read more

"This is one of the best and most clever products I have ever purchased because:..." Read more

"Simple but effective test that puts your mind at rest when buying an older car. Definitely worth buying." Read more

11 customers mention ‘Head gasket leak detection’11 positive0 negative

Customers like the head gasket leak detection. It's easy to use and helps identify issues with the gasket. They say it eliminated a gasket issue and confirmed the head gasket was fine.

"...test kit because one of my two cars is using coolant with no signs of exterior leaks...." Read more

"...this after hours battling with an overheating V8 Westfield...eliminated a gasket issue - and may have helped in acting as a vent bleed when the..." Read more

"Easy to use to sniff out head gasket leaks." Read more

"Helped to confirm the head gasket was fine. For a comparatively cheap option it was perfectly suitable. Did all I needed." Read more

9 customers mention ‘Speed’9 positive0 negative

Customers appreciate the product's speed. They say it works well and provides a clear result quickly. It helps diagnose issues, saves time and money, and offers good value.

"It was very easy to set up and use. It saves a lot of time, effort and costs...." Read more

"Product worked well and gave me a quick and clear result" Read more

"A very quick and simple test. I can only assume the test was correct, but it helped to take any concern out of mind...." Read more

"A bargain, save time and a lot of money" Read more

14 customers mention ‘Color change’4 positive10 negative

Customers are unhappy with the color change of the product. They say the liquid is not true blue, it's grey or green at first, and turns yellow when blown over.

"Color hasn't changed but when I take cR to garage will confirm the result and will update my review" Read more

"Colour was grey/green to start. Didn't change colour on the engine and left it for 20 mins with already hot engine and did two tests...." Read more

"...saved me a lot of money in garage fees and thankfully the liquid didn't change colour so was extremely happy with that so simple and easy to use" Read more

"...my suspicion that this product is just a thermo dye it changes color as temperature rises, its safe to assume that they release two kinds, one color..." Read more

9 customers mention ‘Seal’0 positive9 negative

Customers are unhappy with the seal. They mention that the head gasket seal was broken, the bung doesn't seal properly, and the coolant liquid turns green when the leak is present. Some reviewers say the product works perfectly and they thought the head gasket was damaged, but it was not.

"This kit works perfectly, showed that my head gasket was faulty, with no doubt about results." Read more

"Easy to use, works perfect. Thought the head gasket was damaged, but thankfully not. This saved me alot of money. Found the problem elsewhere." Read more

"First of all. Be careful if using on a Ford. The bung seals to high and the air it draws in, is from the over overflow hole and not the tank...." Read more

"...The head gasket seal was indeed broken and this was a known issue, however it was broken in such a way where the coolant was able to leave the..." Read more

100% perfect
5 out of 5 stars
100% perfect
A local workshop reported head gasket had failed… I didn’t believe them… I didn’t tell them I have 45yrs motortrade experience… purchased this coolant sniffer… totally confirmed I was right. Worth every penny and more.
Hide
Thank you for your feedback
Sorry, there was an error
Sorry, we couldn't load the review

Top reviews from United Kingdom

  • Paul
    5.0 out of 5 stars Excellent product!
    Reviewed in the United Kingdom on 1 February 2025
    Verified Purchase
    It was very easy to set up and use. It saves a lot of time, effort and costs. It would take you time to book in to see a mechanic, effort and time to get to said mechanic and then the added cost of his time and expertise. This simple but effective product saves all of this. The a only thing I didn't like were the instructions were really in a small font which made the extremely difficult to read without magnification. Apart from that small inconvenience, i would highly recommend this.
    One person found this helpful
    Helpful
     Report
  • Eddie McG
    5.0 out of 5 stars Simple and effective head gasket tester
    Reviewed in the United Kingdom on 6 January 2025
    Verified Purchase
    This kit works perfectly, showed that my head gasket was faulty, with no doubt about results.
    Helpful
     Report
  • Stew Morgan
    4.0 out of 5 stars Worked well
    Reviewed in the United Kingdom on 11 December 2024
    Verified Purchase
    Used this to diagnose a head gasket failure on a Honda goldwing. Very easy to use.
    Helpful
     Report
  • Amazon Customer
    5.0 out of 5 stars Very handy
    Reviewed in the United Kingdom on 24 January 2025
    Verified Purchase
    I used to check my car engine
    Helpful
     Report
  • Buster
    5.0 out of 5 stars It was cheap and it worked
    Reviewed in the United Kingdom on 31 December 2024
    Verified Purchase
    Item was a lot cheaper than competitors product but it works and is very simple to use diagnosing a failing head gasket before I stripped down the engine
    Helpful
     Report
  • CHRIS
    5.0 out of 5 stars Excellent test kit
    Reviewed in the United Kingdom on 11 August 2024
    Verified Purchase
    Excellent kit which comes with clear instructions and is very easy to use.

    The first test i carried out was on a recently acquired Audi which I suspected had a head/headgasket issue and the test came back positive (the liquid turned from blue to green within a minute or two). The diagnosis was later confirmed by a trusted garage who carried out their own test and found exhaust gasses in the coolant.

    The second test i carried out was on a SEAT which has been suffering from coolant loss for at least a year or so. As I'd already bought the test kit for the Audi i thought I would give it a go with this car too. Again the test came back positive (liquid turned blue to yellow very quickly). This diagnosis was also later confirmed by a garage who found the EGR cooler had failed.

    I also tested our other vehicles and thankfully in those cases the tests all came back negative.

    In summary a really useful kit, very easy to use and in my experience 100% accurate.
    2 people found this helpful
    Helpful
     Report
  • Hossam Hamdy
    3.0 out of 5 stars Not sure
    Reviewed in the United Kingdom on 8 August 2024
    Verified Purchase
    Color hasn't changed but when I take cR to garage will confirm the result and will update my review
    Helpful
     Report
  • Dave burns
    5.0 out of 5 stars Good.
    Reviewed in the United Kingdom on 4 December 2024
    Verified Purchase
    It done what it said it does. Put my mind at rest and saved me £100s
    Helpful
     Report

Top reviews from other countries

Translate all reviews to English
  • Mike Niles
    5.0 out of 5 stars Works great! Northstar sucks
    Reviewed in the United States on 3 January 2025
    Verified Purchase
    Product works as it should! It proved to me that North Star engines do leak exhaust into the cooling system. Even the ones not overheating. Easy to use. Just unscrew your cold caddy engine radiator cap. Put the plug in. Add the blue juice and fire it up. It will only take a few minutes and you will see the fluid start to bubble. IF it changes color she got a blown gasket or crack. If not check the thermostat, water pump and radiator……
    Report
  • Teren
    5.0 out of 5 stars Works well
    Reviewed in Canada on 23 November 2024
    Verified Purchase
    Worked as expected, best first indicator tester of leaking compression gases, of course its never a good result when it shows positive but when you have a positive result, you know what has to be done.
    Report
  • VIESLET Laurent
    5.0 out of 5 stars Facile a utiliser
    Reviewed in Belgium on 6 February 2025
    Verified Purchase
    Fait le job
    Report
  • polo
    5.0 out of 5 stars simple et fiable
    Reviewed in France on 20 January 2025
    Verified Purchase
    produit tres simple utilisation et tres efficase la quantite peu servir plusieur fois pour tous vehicule a refroidissement par eau voiture moto tracteur .........
    Report
  • Oscar
    5.0 out of 5 stars Efectivo para lo que es
    Reviewed in Spain on 1 January 2025
    Verified Purchase
    Lo he utilizado varias veces, y es efectivo. De momento no se ha equivocado en el diagnostico. y que queda para utilizar un montón de veces mas.
    Report