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Taking Off Top Half Of Inlet

LTHLRB

By LTHLRB,
in Engines & Forced Induction

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LTHLRB Grand Master

LTHLRB

Posted
Posted

Hey soon i am going to be doing my injectors and turbo and what not, and i was just curious, i have done my research and the manual sais to drain the coolant to take the top half of the manifold off? Has anyone done this job? How hard is it? What tools are needed? Is it time consuming?

Thanks. Phill.

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dead32 Mentor

dead32

Posted
Posted (edited)

draining the coolant is for when u take the cooling lines off the throttlebody/top half of manifold, u will need to remoove your crossoverpipe,throttle cable,all hoses/electrical earths, basicaly anything connected to the top half of the manifold, then theres a series of long bolts laying under the bottom section of the manifold, which transfer to the top. take em out then give the top half of the manifold a tap with a soft faced hammer to release its grip on the gasket, then its off! :sick: it took me no more then 30min, but im a mechanic :sick:

Edited by dead32
grim32 Community Regular

grim32

Posted
Posted

The first time i done injectors i didnt even take off the throttle body, the second time i did and it was much easier. If you are only taking off the top half of the manifold to do the injectors i wouldnt bother and just take off the throttle body as it gives you plenty of room.

LTHLRB Grand Master

LTHLRB

Posted
  • Author
Posted (edited)

i am a mechanic too, but only an apprentice :D so would just taking the throttle body off be enough to take all six injectors out? i was thinking the whole top half. With the coolant lines, wont you just be able to block them off rather than draining all the coolant?

Im trying to grasp how long this will take me and rob from creatd.. I was kinda thinking a whole week to do injectors ecu tune and turbo. Ecu and AFM i already know what to do, turbo im not too sure about, rocker cover gaskets i know 100% and plenum i kind of know whats happening.

Edited by LTHLRB
CEF11E Veteran

CEF11E

Posted
Posted

you can actually replace the injectors without removing the TB or the top half of the plenum. once the fuel rail bolts are out you lift and slide the whole assembly forward.

the hardest thing to do is get to the clips on injector #4 & #5.

I am about to replace the injectors and this time will remove the TB as i think it will be easier.

rb20inside Community Regular

rb20inside

Posted
Posted

wouldnt worry bout taking apart plenum.

have changed injectors in a few rb20s and only took off throttle body.

dont really need to drain coolant. just unbolt the tb and unclip lume parts. pull off the coolant lines and just let them drain till it stops (alot less than draining whole lot) just make sure no coolant goes in the holes while the injestors are out

pretty easy job mate, just fiddly (esp. clips) should take bout an hour to change injectors.

maybe a little longer for your first time

LTHLRB Grand Master

LTHLRB

Posted
  • Author
Posted

i wont be doing it myself. I will have someone who knows rb25s like the back of his hand helping me, so shouldnt be a problem, i just wanted to know the best way to take the injectors out. :laugh: thanks heaps.

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