visual differences rb20/rb25

[mattysaidso]

heya,

jus wondering what the visual differences (besides writing on the coil cover) there are between a rb20 and rb25?

basically i want to know how to visually tell the two apart.

cheers!

[RB30-POWER]

Look at the engine number on the block is the easiest way.

Look at the crossover pipe they have slightly different plumbing.

The RB20 doesn't have the VCT solonoid sticking out at the front.

The plenum is different, the rb20 runner 5 & 6 are different to the RB25, this is to clear the r32 brake booster.

Thats a few ways of telling off the top of my head.

[Slide]

the whole engine is visually different

[mattysaidso]

Look at the engine number on the block is the easiest way.

Look at the crossover pipe they have slightly different plumbing.

The RB20 doesn't have the VCT solonoid sticking out at the front.

The plenum is different, the rb20 runner 5 & 6 are different to the RB25, this is to clear the r32 brake booster.

Thats a few ways of telling off the top of my head.

what is different on the engine number? does each series of engine carry the same first digits or sumifn?

what is a vct solonoid? (sory for the dumb question )

cheers!

[CerealKiller]

what is different on the engine number? does each series of engine carry the same first digits or sumifn?

what is a vct solonoid? (sory for the dumb question )

cheers!

the engine number will start off "RB20...." or "RB25....."

[mattysaidso]

the engine number will start off "RB20...." or "RB25....."

thanx mate, wasnt aware of that!

[Bl4cK32]

doesnt actually start off rb20..rb25...

it has rb20 or rb25 engraved in the block just next to where the engine number is stamped...

[TTT]

I bet your one doesn't say that...

[MerlinTheHapyPig]

rb20 has "RB20" imprinted on timing belt cover

[BHDave]

rb20 has "RB20" imprinted on timing belt cover

Not all of them.

RB25 has a bump, for lack of a better term, in the timing cover for the vvt cam wheel on the inlet side.

[yogi000]

rb20 has "RB20" imprinted on timing belt cover

not all of them, when i was buying my r32.....only saw 2 with the rb20 stamped on them....the other 5 or 6 didnt have em

[MerlinTheHapyPig]

ok then, well mine does!

anyway

rb25det

rb20det (black top)

[Col-GTSX]

The other give away is the position of the badge on top of the motor and what that badge says. One is quite long and does not state a capicity (rb20) the other says 2500 (rb25)...

The position of the BOV. The r32 bov sits flat and the rb25 sits on its side.

The lump in the timing belt case indicates 25 motor and rb20's are normally labled so.

That should do...