Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

A common problem caused by the PCV valves on the Opel Astra K.

Model: Vauxhall Astra Astra K - Years: 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
Part: Engine

See other generations:
Video tutorial

On the Opel Astra K, the PCV (Positive Crankcase Ventilation) system can cause various problems if malfunctioning, as shown in the video, especially on the 1.4 turbo engines B14XFT and B14NFT. As the YouTuber demonstrates, a clogged valve can cause excessive pressure in the engine block, pushing oil out of the seals; if the PCV does not properly regulate the vapors, excess oil is drawn into the intake system and burned in the combustion chamber, generating bluish smoke from the exhaust.

A stuck PCV can cause an imbalanced air-fuel mixture, leading to misfires; if stuck open, the engine may draw in too much unmeasured air, resulting in an incorrect reading from the MAF sensor and reducing turbo efficiency.


Posted on 25 December 2025 by ScegliAuto


Related tutorials

Replacing the Coolant Temperature Sensor on the Opel Astra 1.6 8V
Replacing the Coolant Temperature Sensor on the Opel Astra 1.6 8V
Vauxhall Astra (1998-2006 / Astra G) In this brief and simple guide, you will find instructions to remove and replace the coolant temperature sensor on the Opel Astra 1.6 8-valve. First,…
The tire sensors on the Opel Astra K
The tire sensors on the Opel Astra K
Vauxhall Astra (2015-2022 / Astra K) When we see on our dashboard the symbol that we see reproduced on the hood of this Opel Astra K, it means that there is some problem with the tire pr…
Guide to Replace the Camshaft on an Opel Astra G 1.6 8V
Guide to Replace the Camshaft on an Opel Astra G 1.6 8V
Vauxhall Astra (1998-2006 / Astra G) This guide will show you how to disassemble and replace the camshaft on the Opel Astra G with a 1.6 8-valve engine, following these simple steps. Fir…

Other guides you may be interested in

How to reset the tyre pressure warning light on the Kia Niro EV?

To reset the tyre pressure warning light on the Kia Niro EV, inflate the tyres until they reach the correct pressure value. This value is indicated on the sticker attached to the driver's door pillar. Once the tyres are inflated, turn on the instrument cluster to check that the warning light has completely disappeared from the display. If it is still present, you may need to drive for a few miles to ensure it disappears completely from the screen.

Watch the video!


by ScegliAuto

More videos