DIY 4g93T GDI INTAKE MANIFOLD REMOVAL AND CLEAN

[nissan4life]

no scene zeroone you have options..

Rollingstock i never tell the man to take out his cat,you said removing it wud leave a permanent cel and i was just stating that was incorrect..

I was one who got my car without cat and i had no option but to find a solution.My input was simply to inform as both raybic and i had similar issues and we took different paths to solve the same problem.

[rollingstock]

^ I understand where you coming from. Stand corrected on getting the cel off. For me personally if a vehicle came with something i rather leave it, mass produced products like vehicles wouldn't have redundant parts due to cost.

I rather replace the cat than trick the ecu, dumping harmful exhaust gases into the atmosphere is a no no for me.

This is just my personal stance though.

[raybic]

yip the egt sensor is a needle type sensor that is right before the cat ... its located on the cat itself.... thing is its hard to find in the bamboo so if u cant get one chip it with a resistor cause thats a part to play in the open and close loop in regulatin temp from radiator fans to air intake temp and air\fuel.....

[ZeroOne]

^^^^^ohhh I see good info there

[turbo_beast369]

if removing to get more exhaust flow but still reduce emissions just get a high flow cat converter

[nightman22]

dude, seriously how much you would charge me to do dat job on my 4g93 gdi non-turbo

[raybic]

would charge a 400 to do it... its easy to do just there are rubber gaskets u dont want to burst and u have to make a bracket to cover the egr vlave... i frim arima so hit me a pm once i have the time ill do it.

[ZeroOne]

I finally cleaned my intake and blanked the egr earlier this month. The process is very simple.

One of the hardest parts are actually making the blank plate, for this I had my mech take out my original plate and drew around it and the two screws on it on plain paper then carried that paper to my straightener and he made the blank plate according to the drawing for free.

The next hard part is taking out the manifold, I carried my car by the mech who took it out for me. He didn't go under the car to take off the bottom bolts but he did go under the car when putting it back on.

I cleaned it myself with "super" gasoline then rinse with water then purple blast then rinse with water then dry in the sun.

There was a lot of soot in the intake which the gasoline (approx 3 gallons) and purple blaster did a excellent job at removing. When I poured the gasoline into the intake for the first few times it turned into a thick pitch black mixture. I left it there to soak for a few mins then repeated.

Before cleaning


After cleaning


Before


After




After cleaning

[xtech]

You think your work is done?.....
some horror GDI pics

decarbonize, decarbonise [diːˈkɑːbəˌnaɪz]
vb
(Engineering / Automotive Engineering) (tr) to remove carbon from (the walls of the combustion chamber of an internal-combustion engine) Also decoke decarburize
decarbonization , decarbonisation n
decarbonizer , decarboniser n

4G9x GDI Engine before decarbonizing

Pistons




Clumps of greasy carbon build up everywhere..........stop this with oil catch can an shutting the EGR valve. Take not 4G93GDi-T drivers........imagine if your turbo leaking oil



Look at that........yes wonder why the engine dead........an low on power look how clogged these ports can get


GDI Injector can be seen (if u know what u looking for)in this one..........very dirty


So guys clean your engines........inside and outside

The original GDI thread has lots of info you should read up on. The first generation of trinituner GDI owners was plagued with problems plus we had scared mechanics which is where the whole of Trinidad end up with the run from GDI line...we had to find out stuff through trial an error an blazed the trail....lol

[Ted_v2]

Wtfff. That rell stink, valves looking like it not seating properly also

[ZeroOne]

xtech link to original gdi thread?

also is there a write up on how to decarbonize?

At least blanking the egr will prevent carbon buildup.