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Rb Rocker Cover Compatibility

Travis Bickle

By Travis Bickle,
in General Maintenance

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Victory Mentor

Victory

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Posted

Currently I have RB25DET and RB25DE engines apart and have compared the covers. The RB25DE has the same covers as a RB20DET (eg flat top) and the RB25DET has a raised section in the rear half of the cover.

On inspection inside the RB25DET cover has improved oil management in the rear half of the cover where the raised section is.

In theory all of the covers are interchangeable as they all bolt up but the RB25DET covers provide the best oil management.

Travis Bickle Collaborator

Travis Bickle

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  • Author
Posted
Currently I have RB25DET and RB25DE engines apart and have compared the covers. The RB25DE has the same covers as a RB20DET (eg flat top) and the RB25DET has a raised section in the rear half of the cover.

On inspection inside the RB25DET cover has improved oil management in the rear half of the cover where the raised section is.

In theory all of the covers are interchangeable as they all bolt up but the RB25DET covers provide the best oil management.

so, in theory, the raised section isnt there to clear anything, its there to ventilate.

i wonder if there would be any negative effects of putting the 20 covers on the 25det. i would think something like this would have been addressed somewhere on the internet but it just isnt.

Travis Bickle Collaborator

Travis Bickle

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Why do you want to downgrade your car?

oh thats an awesome theory. putting rb20 rocker covers on it is downgrading it.

so, ill dig up some rb26 rocker covers and upgrade it instead. thats brilliant.

come on man, if you dont have an information, dont bother posting, or be big enough to say "ya know, i dont fuggin have a clue" unless you just want to up your post count, and if thats the case, just post a big smiley face so at least we know what youre trying to accomplish.

Bennett Mentor

Bennett

Posted
Posted

Mate if i was trying to increase my post count i would be in the forsale section going "sweet ride" and "thats hot". I wasnt having a go at your idea at all, purely wondering why after finding out that the only difference between the rb20 and rb25 rocker covers is that the 25 one flows better, why would you want to swap it for one that has inferior flow? Fair question i believe...

gotRICE? Veteran

gotRICE?

Posted
Posted
Mate if i was trying to increase my post count i would be in the forsale section going "sweet ride" and "thats hot". I wasnt having a go at your idea at all, purely wondering why after finding out that the only difference between the rb20 and rb25 rocker covers is that the 25 one flows better, why would you want to swap it for one that has inferior flow? Fair question i believe...

Agreed.

And as far as i can remember, the hump actually does clear something at the back of the head. Theres some sort of gold coloured bracket.. ill try dig up a pic.

CoversOffMedium.jpg

Not the best photo, but you can see them. Looks like the hump is there because of them? Or do 20's have them too?

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