Jump to content
SAU Community

Rebuilding An Rb On The Cheap

CEF11E

By CEF11E,
in Engines & Forced Induction

 Share

Recommended Posts

CEF11E Veteran

CEF11E

Posted
Posted

I am putting an Rb20 in an old R31 i have and the engine has a cracked piston but the bore is OK and the engine is otherwise fine.

The car is for daily driving and i wont be chasing big power it will just be 12 psi on the standard turbo.

What is the minimum ammount of parts and labour needed to to get operational.

I want it done properly not dodgily. but dont want to spend a forturne. What bits am i going to need.

Cheers!!!

Link to comment
https://www.sau.com.au/forums/topic/89719-rebuilding-an-rb-on-the-cheap/
Share on other sites
Duncan Grand Master

Duncan

Posted
Posted

cheapest? get a second had rb20 bottom end bolt the head back on and off you go.

or if you want to rebuild yours you will need at least 1 piston, new rings, new bearings, machining of the block.

CEF11E Veteran

CEF11E

Posted
  • Author
Posted

hmmm. I know it will be cheap to buy a bottom end but if i rebuild mine at least i know what i have running. so i think i might still go ahead with it.

any ideas on how much the folllowing bits cost>

bearings

head gasket and other gaskets needed

set of rings

What needs to be done to the block and how much?

Duncan Grand Master

Duncan

Posted
Posted

main and big end bearings are about $100 from ACL for an rb26, not sure about rb20. About 300 from Nissan.

rings, sorry I can't remember what they cost. If you buy new pistons you get rings with them. If you are reusing old pistons you need rings, probably from Nissan not sure about the price.

Gaskets, Nissan sell what they call a VRS kit which includes all the gaskets and seals you need.

Bottom end machining - at a minimum you need to check the piston to bore clearances and the bearing clearances and make sure they are OK based on the factory tolerances, and hone the bores. From there other things you might want to do are:

chemical clean all the upy downy bits

xray or crack test the crank, rods, block

shot preen / cryo freeze the rods

balance everything from clutch to flywheel.

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

when you put a second hand piston into the bore that it was not used in before they dont last very long. your best option would be putting a second hand bottom end on and then rebuilding that if you really need too..

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • The king 2.0
      Nissan fuga 450gt android screen

      By The king 2.0 · Posted

      Hi guys . Can someone help me  I bought an Android screen for my Nissan fuga but it won't turn on   
    • MBS206
      NC MX5

      By MBS206 · Posted

      My guesstimate, with no real numbers to back it up, is it won't effect it greatly at all.its not a huge change in position, and I can't see the air flow changing from in turbulence that much based on distance, and what's in front of it. Johnny and Brad may have some more numbers to share from experience though.
    • dbm7
      Automatic Power Button Light Flashing

      By dbm7 · Posted

      Which solenoid? Why was it changed? Again, why was this done? ...well, these wear..but ultimately, why was it changed? Did you reset the idle voltage level after fitment? I'm just a tad confused ~ the flash code doesn't allude to these items being faulty, so in my mind the only reason to change these things, would be some drive-ability issue....and if that's the case, what was the problem? Those questions aside, check if the dropping resistor is OK ...should be 11~14 ohms (TCU doesn't throw a flash code for this) ~ also, these TCU designs have full time power (to keep fault code RAM alive), and I think that'll throw a logic code (as opposed to the 10 hardware codes), if that power is missing (or the ram has gone bad in the TCU, which you can check..but that's another story here perhaps).
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Question for people who "know stuff" I am looking at doing the new intake like the one in the picture (the pictured is designed for the OEM TB and intake plenum), this design has the filter behind the front bar, but, the filter sits where the OEM duct heads into the front bar, and the standard aperture when the OEM ducting is removed allows the filter to pulled back out of the front bar into the engine bay for servicing, a simple blanking plate is used to seal the aperture behind the filter This will require a 45° silicone hose from the TB, like the alloy pipe that is currently there, to another 45° silicone hose to get a straight run to the aperture in the front bar Question: how will it effect the tune if I move the MAF about 100-150mm forward, the red is around where my MAF is currently, and the green would be where it would end up Like this This is the hole the filter goes through  Ends up like this LOL..Cheers    
    • Duncan
      R34 Plug Identification

      By Duncan · Posted

      Despite the level up question, actually I do know what that is....it is a pressure sender wire.  So check out around the oil filter for an oil pressure sender, or maybe fuel pressure near the filter or on the engine. Possibly but less likely coolant pressure sensor because they tend to be combined temp/pressure senders if you have one. Could also be brake pressure (in a brake line somewhere pre ABS) but maybe I'm the only one that has that on a skyline.
×
×
  • Create New...