Jump to content
SAU Community

Earthing For Rb25

hardsteppa

By hardsteppa,
in General Maintenance

 Share

Recommended Posts

hardsteppa Grand Master

hardsteppa

Posted
Posted

So in trying to track down my intermittent idle issue on my R33 gtst, I noticed that the exhaust manifold ground lead looks pretty old and frayed. I know 2 things about wiring, one that a good ground is important and the other is I know pretty much nothing else about wiring...so was going to run some ground leads from the block to chassis...could someone point me in the right direction of the best sort of wire to use, and best points to do it from? Like I said don't know alot about it, so any suggestions would be appreciated. Thanks :)

Link to comment
https://www.sau.com.au/forums/topic/406535-earthing-for-rb25/
Share on other sites
GoHard Collaborator

GoHard

Posted
Posted (edited)

When I took the manifold off i noticed how charred it was @ turbo end. Pulled it straight to measure for a replacement, it was dust. Fell to bits. I replaced it with another earth strap. Used a copper lug and is fine with the heat. Put a multi from heat shield to chassis point and check resistance to see if it needs replacing.

If I understand correctly the earth strap is to prevent electrolysis, I doubt it would help your idle.

Edited by GoHard
Tommy Kaira RL Mentor

Tommy Kaira RL

Posted
Posted

I would check your coil packs also. If your talking about the wire from the heat shield to the body then that is to stop static electricity that might come off from around the turbo from it spinning.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

My car came with an aftermarket earthing kit which has about 8 leads going to various places on the block and the cas bolts etc. There are a few around so I guess there is a market for them but didn't do a before and after so don't know how really usefull they are. But definitely replace any obviously dodgy connections.

  • 2 years later...
  • 9 years later...
silviaz Experienced

silviaz

Posted
Posted

I noticed my earth wire was disconnected when I attempted to do some work, but the wire was yanked off with the bolt still attached to the exhaust manifold heat shield. I used an aluminium connector to replace it from super cheap like this, will it melt? I was worried as the old one is steel. 

https://www.supercheapauto.com.au/p/sca-sca-electrical-terminals---ring-eye-5.0mm-red-25-pack/120047.html?cgid=SCA01060604#start=48

 

I removed the rubber of course as that's going to melt.

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

    • Kapr
      Boost cut after swap(RB25DET NEO) R34

      By Kapr · Posted

      So stock ECU does not like anything above 10 psi?  That Nistune one is just for "try" if it will be any different, I know it need to be tune for that. I know but YOU may know about these problem but i/we dont. They few little Skylines here let alone people who know anything about tham so that is why iam asking here  
    • Duncan
      V37 Radiator removal

      By Duncan · Posted

      So now we have a radiator with no attachments whatsoever. It lifts up with a particularly tight spot between the drivers side air box mount and the lower radiator outlet, but if you've got this far you will sort that too. This is the lower mounts with the rad out so you can see where the rubber bushes go, it is a straight shot upwards Done! Assembly is the reverse of disassembly, with blood less likely to be shed.
    • Duncan
      V37 Radiator removal

      By Duncan · Posted

      Right, onto the second last trick. The Air Con condenser is mounted to the front of the radiator and stays in the car when the radiator is removed. There are 2x 10mm headed self tappers holding the top of the condenser to the radiator, remove those The bottom of the condenser is attached to the radiator with clips. You need to lift the condenser out of those clips and clear (up, then forward). f**ked if  could work out how to do that last bit with the front bumper on. I hope you can, and you share the trick.  Bumper removal probably deserves its own thread one day once I've recovered the will to live, but basically you need to remove the wheels, front inner guard liners (clips and 10mm headed bolts), the self tapper between the guard and the bumper at the rearmost point of the bumper (same as an R32 that bit), any remaining clips at the top/front of the grill, an absolute bastard design with a plate that holds the top of the bumper above the headlight each side (only 1 bolt which is tricky to get to, but the plate catches 2 places on the bumper and must be removed....carefully!) and push clips between the bumper and guard under the headlight. If you've done all that you will be faced with wiring for the fog lights on both sides and in ADM Q50 RS at least, 4 nasty tight plugs on the driver's side for the ADAS stuff. So, the clips at the bottom look like this on drivers side (looking from the front) And on the passenger side (also from the front), you can see this one is already out Clearance on both of these are super tight; the condenser needs to move up but the upper rad support mount prevents that, and the radiator can't move down far because it is (rubber) mounted. Once you achieve the impossible and drop the condenser off those mounts so it does not stop the rad moving, you are good to go
    • Duncan
      V37 Radiator removal

      By Duncan · Posted

      OK, next the shroud needs to come off and there are a couple of tricks. Firstly, there is a loom from near the passenger side headlight to the fans, coolant temp sensor etc and there is no plug to undo.  In my case I was OK to leave the shroud on top of the engine so I just undid the passenger side fan plug and about 10 of the clips which gave enough free wire to put it aside. The fan plugs were super tight, the trick I used was a small falt screwdriver to push down on the release tab, then a larger flat screwdriver to lever the plug out of the fan unit....be careful with how much force you apply! If you need to remove the shroud altogether for some reason you will have to deal with all the plugs (tight) and clips (brittle)....good luck. I removed all of the clips and replaced them with cable ties that I will just cut next time. Also, in the Red Sport / 400R at least, the intake heat exchanger reservoir hose is bolted to the shroud in 2 places with 10mm headed bolts; so remove them (the hose stays in the car; no need to undo it at the t fittings down at the radiator lower mount. Once you've dealt with the HX hose and the wiring loom, there are 3x 10mm headed self tappers holding the top of the shroud to the radiator; remove those.   The shroud then lifts out of the bottom mounts where it sits on the radiator, up and onto the engine out of the way. Simples
    • Watermouse
      Unpeeling the Orange

      By Watermouse · Posted

      Ok, disregard my “rate them” comment, sorry for my unrealistic input
×
×
  • Create New...