Mazda CX-7

[Imprez]

Voici son explication :

I'm writing this because of something that I see as becoming an issue on all GDI engines. This will affect turbo GDI engines faster than N/A GDI, but it will be an issue regardless.

Let me start by saying if you need to ask what a PCV system is, use Google. Otherwise this article will be far too long and I'll be up all night writing. I like writing and all, but I like sleep better.


Here's the quick explanation. The crankcase vent air that goes through the PCV contains oil vapor. That vapor normally ends up in your intake track and some of it gets burned. The rest of it collects on the inside of the intake manifold, the back of the throttle body, the intake ports, and the intake valves and bakes on over time.

On a port injected vehicle, the injectors are spraying on the back side of the valves and parts of the intake ports and helps keep them clean.


This is a very well known issue with gas direct injection engines. Some owners report a major loss of power and others report that it runs like a diesel. The only way to remove it is to remove the intake manifold, pour some strong engine cleaner like Seafoam or B-12 Chemtool into the ports, let them soak, then remove the liquid and use a small brass wire brush on a drill do break it up. This is costly if you can't do it yourself and it's time consuming if you do.

How do we fix that you ask? You need a good quality catch can. The catch can goes in between the PCV valve and the intake manifold. A good quality catch can has baffles so as the air moves though it, the oil vapor can condense and drip to the bottom while the air moves through it and out without the vapor. You then empty it every oil change. Do NOT reuse the oil from a catch can. It contains not only oil vapor, but fuel, water, and who knows what other byproducts of combustion that don't belong in your crankcase.

-Nate

[lemarin]

Me semblait que ta Maxima t'en donnait amplement ? C'est quoi au juste cette envie soudaine de changer d'autos aux 3 mois ? J'suis pas sur de comprendre l'idée,....