bladest

Hi i want to ask , how to clean carbon deposits for gs 4 th gen 450h ,is it a big issue what will happen i will not have peak power etcs? How complex is to clean this carbon build up how i can prevent it do i need to use additives or ?
How big is this carbon deposit build up as an issue for gs450h 4th gen , since car is direct injection.

Cwang

No, no and no. Don't ever think about it again.

703

Just pay your village mechanic. No point asking here as it’s not like you will be doing engine tear down yourself.

bladest

how big is carbon deposit on these engines?
Village mechanic is very busy .

Cwang

It's not a problem on these engines. Unless your mechanic has diagnosed it as a problem due to symptoms you've reported, do not concern yourself.
If you need to get the valves cleaned, you'll just have to book in and wait until your village mechanic has time. What else are you going to do but wait? If you have to ask, it's well over your head and not something you will DIY.

Lwerewolf

Let's start with some kindergarden walkthrough questions.

What causes carbon buildup on the intake valves?

909

Lwerewolf bringing the smoke lol

bladest

Its well known documented that direct injections suffer from carbon build up unforunately.

703

on your car, very likely as it is single handily the most troublesome GS on this forum.

Anything and everything is on the cards for you.

ItzFilyO

Yeah I don't think it's a problem for the 4GS line but we'll make an exception for u!

Gerf

That's why I never get a flu shot.

Lwerewolf

Why does that happen?

Marzabella

Yeah nah, carbon build-up may be a problem for direct injection engines, but the GS engine is direct AND port injected, which does not commonly suffer from this issue at all

bladest

i am not mechanic like you so i have no clue , simply because of the injection technology i think.
Again well documented over internet.... all direct injection systems cars build over time carbon deposit.

i am pressure sure that over time car builds carbon deposits some people with lexus LS - which is also direct and port injection have also same issue carbon deposit and they need to clean car not sure how often.

Lwerewolf

The reason for this is also VERY well documented over the internet.

You're breaking the laziness meter.