---
product_id: 48670458
title: "Hydro Valve Additive, 300 ml"
brand: "liqui moly"
price: "€ 34.67"
currency: EUR
in_stock: true
reviews_count: 13
category: "Liqui Moly"
url: https://www.desertcart.it/products/48670458-hydro-valve-additive-300-ml
store_origin: IT
region: Italy
---

# Dampens hydraulic lifter noise Boosts drivability & reliability Optimizes tappet function Hydro Valve Additive, 300 ml

**Brand:** liqui moly
**Price:** € 34.67
**Availability:** ✅ In Stock

## Summary

> 🔧 Quiet your engine, amplify your drive.

## Quick Answers

- **What is this?** Hydro Valve Additive, 300 ml by liqui moly
- **How much does it cost?** € 34.67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/48670458-hydro-valve-additive-300-ml)

## Best For

- liqui moly enthusiasts

## Why This Product

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

## Key Features

- • **Cold Start Savior:** Eliminates cold morning engine noise, protecting your ride in harsh weather.
- • **Silence the Rattle:** Effectively quiets worn hydraulic lifters for a smoother engine start.
- • **Easy Add-In Solution:** Simply pour into your oil system—no costly repairs or complicated installs.
- • **Precision Tappet Care:** Ensures optimal tappet performance, extending engine life.
- • **Universal Compatibility:** Works seamlessly with all commercial motor oils in petrol & diesel engines.

## Overview

Liqui Moly Hydro Valve Additive (300 ml) is a high-performance engine additive designed to silence noisy hydraulic lifters and optimize tappet function. Compatible with all commercial motor oils for petrol and diesel engines (excluding motorcycles with wet clutches), it enhances operational reliability and drivability, especially during cold starts. Easy to use and trusted by thousands, it’s a smart, cost-effective solution to maintain engine health and avoid expensive repairs.

## Description

Buy Liqui Moly Hydro Valve Additive, 300 ml at desertcart UK. Free delivery on eligible orders.

Review: Really good product if you understand what you’re doing - Vortec 6L V8 lifters started to make some noise especially during cold mornings and it was getting louder and louder fast. Tried to flush the engine twice but no help although engine got bit smoother. Throwed this in between the oil change and the noise completely disappeared fairly quickly. Now even that the truck is sitting 3 weeks in a weather between 0 to -15 in C (32 to 5 in F) there’s absolutely no noise in cold start while the engine is warming up. I’d still recommend the engine flush or several of them as the noise is usually about the poor oil flow (dirt all over the place) and dirty & sticky lifter rods. If this does not help, manually clean the rods and inspect the rockers. Bit time consuming but fairly simple job, tons of YouTube videos available for sure. Act fast as more noise more damage eventually. Also understand what you’ll be doing. My V8 is a 2003 engine that is a) in a good shape (piston pressures solid 13 bar) and b) the engine does not have anything fancy in it – just simple V8 (no variable this and that, no eco throttle pistons to save fuel etc.). As the magic of these is the change the oil structure from viscosity point of view you can actually do more harm than good with your engine especially with the newer ones.
Review: Excellent product - I don't know what's in this but it worked straight away with the noise from my tappets. The garage wanted £500 to repair it. Easy to use just pour it in the same place as your oil.

## Features

- Dampens the noise produced by worn hydraulic lifters
- Ensures the optimal function of the tappets
- Increases the operational reliability and the drivability of the vehicle
- For all commercially available motor oils in petrol and diesel engines with and without diesel particle filters
- Not for motorcycles with a wet clutches

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001CZODI2 |
| Best Sellers Rank | 108,431 in Automotive ( See Top 100 in Automotive ) 437 in Fuel Systems |
| Brand | Liqui Moly |
| Customer Reviews | 4.5 4.5 out of 5 stars (5,997) |
| Date First Available | 23 Sept. 2010 |
| Exterior | painted |
| Item Weight | 266 g |
| Item model number | 1009 |
| Manufacturer | Liqui Moly GmbH |
| Manufacturer part number | P000004 |
| Product Dimensions | 5.4 x 5.4 x 18.5 cm; 266 g |
| Viscosity | 2T |

## Product Details

- **Brand:** Liqui Moly
- **Exterior finish:** painted
- **Inlet connection size:** 12.7 Millimeters
- **Inlet connection type:** Flange
- **Item dimensions L x W x H:** 5.4 x 5.4 x 18.5 centimetres
- **Material:** Polytetrafluoroethylene
- **Number of ports:** 1
- **Outlet connection size:** 12.7 Millimeters
- **Outlet connection type:** Flange
- **Specification met:** API

## Images

![Hydro Valve Additive, 300 ml - Image 1](https://m.media-amazon.com/images/I/517HqwtY8KL.jpg)

## Available Options

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

## Questions & Answers

**Q: Difference between this and the liqui moly lifter additive?**
A: Just had a look at both products and the picture looks the same and so does the description so I would say one is for European Markets and the other is the English version but same thing. By the way it does clean the lifters and reduces tappet noise as long as your car does not have serious issues. I use it at oil changes that I do myself and leave 300ml for this oil to be added with engine oil so as not to overfill. I also do regular oil changes and every other oil change this is added.

**Q: Where do you pour this into?**
A: Hi, the additive goes into the engine , you might get slightly better results if you change the oil and filter at the same time, I found any slight improvement was short lived.  But some people swear by it.  Hope this helps.

**Q: How effective is this product at reducing hydraulic lifter tapping noise? Do you leave this product in the oil or does it have to be drained out?...**
A: Worked well on my bmw320 d compact

## Customer Reviews

### ⭐⭐⭐⭐⭐ Really good product if you understand what you’re doing
*by L***E on 4 January 2021*

Vortec 6L V8 lifters started to make some noise especially during cold mornings and it was getting louder and louder fast. Tried to flush the engine twice but no help although engine got bit smoother. Throwed this in between the oil change and the noise completely disappeared fairly quickly. Now even that the truck is sitting 3 weeks in a weather between 0 to -15 in C (32 to 5 in F) there’s absolutely no noise in cold start while the engine is warming up. I’d still recommend the engine flush or several of them as the noise is usually about the poor oil flow (dirt all over the place) and dirty & sticky lifter rods. If this does not help, manually clean the rods and inspect the rockers. Bit time consuming but fairly simple job, tons of YouTube videos available for sure. Act fast as more noise more damage eventually. Also understand what you’ll be doing. My V8 is a 2003 engine that is a) in a good shape (piston pressures solid 13 bar) and b) the engine does not have anything fancy in it – just simple V8 (no variable this and that, no eco throttle pistons to save fuel etc.). As the magic of these is the change the oil structure from viscosity point of view you can actually do more harm than good with your engine especially with the newer ones.

### ⭐⭐⭐⭐⭐ Excellent product
*by J***W on 15 June 2021*

I don't know what's in this but it worked straight away with the noise from my tappets. The garage wanted £500 to repair it. Easy to use just pour it in the same place as your oil.

### ⭐⭐⭐⭐⭐ Excellent Product
*by M***S on 10 November 2020*

Excellent Product. Quick Delivery Easy to pour into engine Added to Engine immediate result. Reduced noise to zero. Highly recommended.

## Frequently Bought Together

- Liqui Moly Hydro-Stößel-Additiv 300 ml (1009) Hydro Valve oil additive
- Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037
- Liqui Moly 2007 Jectron Gasoline Fuel Injection Cleaner - 300 ml , blue , 10.14 Fl Oz (Pack of 1 )

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-23*