rb20 bearing knock -help

got another RB20 turbo motor for cheap but its minus injectors,turbo BUT it has a slight bearing knock( crank needs to be polished and a new set of bearings) it looks wors than the R33 bearing knock i had on my rb25 motor,the pistons on the other hand look nakered.SO my question to you guys is what pistons to use besides wiseco and the expesive stuff ,since this is the 20litre 6cylinder can the sr20 pistons be used? I just want the motor runing on th echeap side to move the vehiclearound while all the other mods are being done.the total motor rebuild will come later any ideas guys?

the sr20 is a 2 litre yes, BUT it has 4 cylinders... the RB20 is a 6 cylinder 2.0l, therefore the pistons are smaller, and i dont think you can bore out the rb20 big enough to accept the sr20 pistons!!! 😂

ok thanks but what pistons could i use,only one is sort of looking a bit K@K....
RB20DET Twin cam
Bore & Stroke 78 X 69.7
Capacity 1998
Power 210ps @5600
Compression 8.5 to 1
what would have the same bore?

Hi, rebuilt many motors but no expert. if I was you I would get the spec of your rb 20 piston and google a piston manufacturer and see what pistons for other motors are the same/ or very similar. remember that there are pistons that have the same physical size but can have different pin sizes, pin to crown dimensions (top of piston) to name a few variables.

i have a set of vg30dett pistons lying around, but at 87mm they will be way to big 🙂

I think ill google like the antman sugested,or try masterparts,maye ill get lucky,thanks guys i have tons of vg 30 pistons,i have had a few hardbodys and twice as many vg30 engines heheheh,the yards starting to look like i have a tow truck business.hahaha
Another part i seek is the module ( for timing) attached to the front of one of the cam pullys, any one has one here in kaapstad? will this unit be the same for all rb engine?

You don't perhaps have the intake manifolds plust the top feed injectpr rails for the VG30...?

yep i do,its not a turbo motor.I have from the import motor wich is the larger in diameter than the backies injectors base.can these work for an rb motor?

Sorry, I don't know....it was a bit off topic, I asked because I was looking for another intake manifold with top feed fuel rail so I could convert to top feed....

not to worry,i dont mind going off the topic, if im lerning something new. so you want to convert a rb25 or vg30 det to a top fed? i do have a mani but im using it when my vanderlider vg30 is done those are hard to find .

I have a VG30ET motor with a Maxima intake manifold, it uses the phase one side feed fuel injector rail, because of the intake or top manifold being so lo I have to change to the normal VG30 intake to make use of top feed injectors....

I am not sure but I think the old R31 2L skyline here in SA ran the RB20, have you checked your local midas and autozone, they normally have high and low compression pistons....

Draco wrote:

I am not sure but I think the old R31 2L skyline here in SA ran the RB20, have you checked your local midas and autozone, they normally have high and low compression pistons....

think it ran the CA20E not 100%

Could be........

R31's

1.8 L CA18I I4
2.0 L CA20E I4
2.0 L RB20E I6
2.0 L RB20ET I6
2.0 L RB20DE I6
2.0 L RB20DET I6
2.0 L RB20DET-R I6
3.0 L RB30E I6
2.8 L Diesel RD28 I6

yeah you get both types of skylines, although i dont know if the rb ones were released here!

either a 4 cyl 2.0l, or a 6 cyl 2.0l???

easy to make the choice i'd say!

i have the same maxima and the other import motor . i checked the rail and injectors they are side feeds. so your plan is to use the backie manifold and a topfeed injector and rail.the ones i have wont work .you will have to use a custom made rail?!?!?!
as for the local rb's they were rb30e and rb20e NO de or det.well start fitting the motor this weekend to get the engine mountings right.I ma looking for a 21R toyota box ,anyone in capetown got one?

I was thinking if I use the manifold on the parthfinder typ vg that uses top feed I can just carry it over to my engine and re route all the piping.

that would work, try the tow truck companys. they lve the nissan v6 hardbodys,here they bu up parts and stock pile them,and wont sell you one even if they have more than one.coming back to my questio, thething atached to the front of the cam puly can it be used from another car, or is it 6cylinger /4 cylinder specific?

godzilla wrote:

coming back to my questio, thething atached to the front of the cam puly can it be used from another car, or is it 6cylinger /4 cylinder specific?

Sorry man....what thing....cam pulley or crank pulley?

cas?