DIY - Vitz intake manifold cleaning the lazy way

[Storm]

Upon request of Alta I'm doing a DIY on cleaning the intake manifold of the Vitz. I wasn't bothered to remove the throttle body so i did it the lazy way. Make sure the engine is cold otherwise you'll not be able to remove the back housing of the airbox because your car will not start without the airflow sensor in place. When the engine is cold it is on auto choke so make a note of this.

You'll need a #10 spanner and a can of WD-40

And before you all go mental and point out that my vitz is grey, this is @alraze's car, I had already done my cleaning in the morning.

Open bonnet and remove the air filter housing as if you were about to change the air filter

Open these 3 nuts (circled red) using a number 10 spanner

Unhook your air flow sensors wires (large red circle) by pressing down on the release button (small red circle)

Forgot what this sucker is called, just pull it up!

now that the rest of your airbox is loose just twist a few degrees and lift up.

Underneath you'll find your throttle body

Close up if what you need to clean, take a few shots of WD-40 to it and just clean it up (engine off)

Inside this cars intake manifold was pretty clean (Picture taken with engine off)

Another view, again engine was off, but the butterfly will have to be fully open for you to be able to shoot the WD-40 onto the intake and the engine will have to be running. Just use your commom sense as to how much you should spray into the manifold and how long you should hold the throttle open for (remember that the engine will die as soon as it warms up - no air flow sensor connected)

Repeat the process in reverse to fit everything back into place

The finished result, and it was alot faster/ smoother running.

It's late so i'm exhausted and i know i might have missed a crucial point out, so please ask as amny questions as you'd like and i'll get back to you all by around 3-4pm tomorrow.

[Storm]

this DIY is strictly for the 1.0 Vitz with the 1SZ-FE engine and i'm not responsible to any damage to your car whilst re-enacting this DIY.

This process is nearly the same for most EFI cars with inline engines.

[PuNk]

Every thing is fine
But whose Vitz is it?
U had in another colour

[Storm]

I should point out that my vitz lost to this vitz (pictured in this DIY) in a race a few months back (around 6 cars length at 100km/h). Today after doing my cars intake cleaning (but still with old/rusty plugs) it had no problem leaving this car behind.

So i know this process works.

Also after the process was done on this vitz the owner @alraze felt a significant increase in response & power in the mid-high rev range.

Maybe some time soon i'll be building headers and polishing/flowing the intake manifold (inside) of my car. (targer 95bhp)

[Alta]

storm you have mail,2 emails actualy.

TY for this post,but i am way too lazy and i doubt ill ever do this to my Vitz let alone any of the ones i am selling

But i just might and thanks again

[Storm]

@punk

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Reply By : Storm on 9/3/2006 12:34:55 AM
And before you all go mental and point out that my vitz is grey, this is @alraze's car, I had already done my cleaning in the morning.
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[Storm]

@alta
it take 10-15 minutes, give it a try on your own car.

[szuberi]

dont take my comments in a negative way but i dont know how can u clean this up like the way you did.

you have basically worked on the opening of the throttle body...not the intake manifold itself.

the area right inside the opening of the throttle body may collect dry dust and grime only (warm air that is less rich in oxygen)...and there is nothing for it sto stick to...unlike the portion where you have your fuel injectors that collect harmful carbon deposits that stick to the inside surface. so the point here is...what would a lubricant and degreaser do when it is sprayed inside the opening?....unless you clean it by opening the throttle body and the manifold out fully...nothing in my opinion.

or tell me if your objective was to have the lubricant travel inside the manifold to the point where you have those carbon deposits....? even if that is so....wd40 is very mild and not powerful enough to do remove those deposits in my opinion.

lastly...this all may work out right but i havent seen this done this way so its all my opinion only.

good luck.

[Storm]

@salman
that's why this is the lazy guys guide.

I understand your points but since there is usually just a slight film on the inside i managed to clean most of it out with a bent nozzle attached to the WD-40 can.

You'd be surprised as to how much of the cr*p went away on the first application (without any elbow grease).

Most of the carbon deposits on the injectors can also be removed with a few shots of WD, but i'll save that for my next DIY. I cannot show you the insides of the intake since i don't have an endoscope at the moment, but you'll just have to take my word for it.

Seriously you should try it and see the results for yourself. (try a small test area first to be sure)

[agha300]

gooddy. now go 2 bed nd sleep

[Storm]

@agha
just call me in the morning (i'm in the Live chat room right now)

[spectra]

good to see someone else doing DIY's
if u think WD-40 make a difference, try liqui moly intector and TB spray. its 10 times more effective.

[Radeon9200]

Spraying WD40 may be a fast track option but I think 100% satisfaction is possible only if throttle body is taken out. Having taken out air housing, its just a matter of taking three more screws out and then you will be surprised to see that the other side of throttle body resembles 16 century chimney in a shanty town England. The grime that is on the other hand of the throttle body is rigid and does not go away even if you rub it hard with a cloth immersed in WD40. So just a spray with engine running does only 50% of the job. So brother Storm take you DIY a little further and open up throttle body.

[Salarzae]

never say good, just say how??? I know better!!!!!???

@Storm

u know what I mean!

[Storm]

@salarzae
ROTFLMAO!!

@Radeon9200
I wish i could but i never get the car for long enough, otherwise i woudl have gone all the way.

@spectra
If i had the time i'd have gas flowed the intake manifold, but since i had a can of WD-40 at home i used it.

[beeberg]

(y)

great work done sameer bhai, the step by step illustration is awesome.

impressed. when i will own a vitz i will get much guidance from you

[imranbhatti]

@storm

Good effort but i have some concerns,

1) U shouldnt use WD 40 coz its too oily and more attractive for stain so some less oily sprays like 60, 90 or injector spray (said by Spectra) shuold be better then 40 (Just my Understanding for using some thing this way).

2) Either u use WD 40, 60 or Liqui Moly injector spray but corbon/stain removed from Intake manifold will dirrectly goes to combustion chamber after spraying so i think its better to do it in a way as said by @szuberi & @Radeon9200.

@all
As per my understanding wat ever we use this way will be harm ful for engine. Do correct me if i m wrong.

[Krazee]

great DIY.....you can also use old soft bristle tooth brush to scrub the inside but do it gently.

[Storm]

@all
both the vitz are runnig alot smoother and are producing more power (throughout the rev range) than before. Will remove the intake manifold as soon as i can get my hands on a new gasket for it and do a part-2 of this DIY.

[szuberi]

sameer....why do u think you need a new gasket? unless it is leaking or something, i suggest you dont touch it. like your car is farily new right but if you are doing an all out service and cleaning...then do it.

intake manifold gaskets last a lifetime usually and dont use anything but an OEM Toyota one.