Got the RB26...questions with pics

Post by **002-M-P** » Fri Dec 08, 2006 3:47 am

Ok figured I would start a thread to ask any random questions I might have...

The motor I bought was labeled as uncut harness. The motor DID come with an uncut harness to the ECU...BUT it is cut in two more places in the engine bay. I haven't tried to troubleshoot these two places yet, but I have an idea that one has wiring for the headlights/turnsignals, etc....and the other I'm not sure of (I'm thinking A/C, MAF's, AIT, etc). All the wires from random sensors are cut with tails remaining (except the AIT sensor which was cut with no wires remaining..bastards). Also, there is only one fuse/relay box with the motor, not sure if there should be more. This is my first motor that I have every bought in this fashion, so is this at all common concerning a motor with an "uncut" harness? I guess this install is just going to take a little more time to wire than originally anticipated. (Side note*...the cut harness you see laying on the ground is of no real concern, its the one for the interior gauges and whatnot)

And here is how it is sitting right now....got the turbos and manifolds pulled off last night.

I also took the spark plug cover off and checked every plug. The plugs themselves all looked good. I will be doing a leakdown test this weekend...even though I plan on rebuilding anyway

Post by **Darius** » Fri Dec 08, 2006 4:18 am

OOFDAH! That is not what I would call an "uncut" wiring harness. I would get that replaced from the place you bought it from or you will have a lot of soldering to do my friend. It wouldn't be that tough to reconnect it because you would simply have to match the wire colors (mainly), but what a major PITA.

The motor looks to be in reasonable condition compared to some we've seen recently.

Post by **Carl H** » Fri Dec 08, 2006 4:33 am

that looks to be fuse box wiring which is useless to you, the key is if the efi harness was uncut.

Post by **Darius** » Fri Dec 08, 2006 4:55 am

Ahh I'm dumb and didn't read that right. Yeah if your engine harness is okay, then forget all that other crap.

Post by **Blown240sx** » Fri Dec 08, 2006 5:43 am

youve got about 50-60 bucks in fuses right there.

Post by **002-M-P** » Fri Dec 08, 2006 6:52 am

Alright, thats goodnews then. I was just about to bury myself in the FSM wiring schematic, guess I will hold off on that for now. One other thing I can't figure out is why in the hell they would unbolt one of the motor mounts and cut straight through the rubber piece of other one...makes no sense when it is only a single nut.

Got another quick question though. I have the RB25 transmission, but still have the RB26 clutch and flywheel only. I know the 250mm rb26 clutch won't work but will the stock rb26 flywheel work with the 240mm rb26 clutches?

Post by **Spazz** » Fri Dec 08, 2006 7:00 am

002-M-P wrote:One other thing I can't figure out is why in the hell they would unbolt one of the motor mounts and cut straight through the rubber piece of other one...makes no sense when it is only a single nut.

probably got lazy , said eff it and fired up the torch.

Post by **rustbucket** » Fri Dec 08, 2006 7:15 am

002-M-P wrote: One other thing I can't figure out is why in the hell they would unbolt one of the motor mounts and cut straight through the rubber piece of other one...makes no sense when it is only a single nut.

My RB25 was the same way

002-M-P wrote:Got another quick question though. I have the RB25 transmission, but still have the RB26 clutch and flywheel only. I know the 250mm rb26 clutch won't work but will the stock rb26 flywheel work with the 240mm rb26 clutches?

I read this about 6 times now and still dont know what you are asking.

Post by **002-M-P** » Fri Dec 08, 2006 8:02 am

The rb26 clutch is a 250mm diameter clutch while the rb25 clutch is a 240mm diameter clutch, which is apparently why the rb26 clutch won't work with the rb25 transmission. So what I'm asking is....are the flywheels the same/will they work?

Also..are we 100% positive that the rb26 clutch won't work in the rb25 transmission? Because I keep on seeing (on takakaira and similar) clutches that say rb26dett/rb25det/rb20det....but these are primarily twin disc clutchs and are 200-225mm diameter.

Post by **002-M-P** » Fri Dec 08, 2006 2:54 pm

flywheel anyone?

Post by **HxC_Nismo** » Tue Dec 12, 2006 2:09 pm

002-M-P wrote:flywheel anyone?

I have an rb26 flywheel but if your using the rb25det trans your going to need the rb25 flywheel but i got my flywheel with my rb25det trans you could too. i got my trans from http://www.p1-performance.com and your going to have to call them to see if they have one in stock cause they dont list them. let me know if you want the rb26 flywheel and ill let you know

Post by **002-M-P** » Tue Dec 12, 2006 3:03 pm

It ends up the people I bought my motor and transmission from went ahead and put the rb25 flywheel and clutch on my motor for me and forgot to tell me. I measured it and it was a 240mm clutch and i was like wtf? So gave them a call yesterday and they told me about it.

Post by **HxC_Nismo** » Thu Dec 14, 2006 2:13 pm

who did you buy your motor from that thing looks beat to hell.

Post by **002-M-P** » Thu Dec 14, 2006 6:31 pm

HxC_Nismo wrote:who did you buy your motor from that thing looks beat to hell.

??? from what people have told me, it looks better than most motors people have been getting lately. I'm taking the head off this week, but so far everything else has been in great condition (other than the turbos with leaky seals).

Check my other thread down lower...it even came with the oil drive so i dont' need to collar the crank

Post by **rotorimp** » Fri Dec 15, 2006 6:53 am

Why are you taking the head off? Unless it has some problem or your leakdown/compression test did not go well there is no reason to take it off.

Post by **002-M-P** » Fri Dec 15, 2006 4:35 pm

rotorimp wrote:Why are you taking the head off? Unless it has some problem or your leakdown/compression test did not go well there is no reason to take it off.

Well, I am planning on taking the entire motor apart and inspecting everything (pistson, rings, rods, bearing, etc). Then when I put everything together, granted I don't need any new parts (thought I will probably get new crank and rod bearings anyway) I am going to put it all back together and replace every gasket with OEM nissan gaskets that I bought and a Cometic metal headgasket. I do not plan on removing this motor again if I don't have to.

Post by **Yellow4g63** » Sat Dec 16, 2006 12:40 pm

save that crank for me I can use it.

Post by **Darius** » Mon Dec 18, 2006 4:43 am

heh I think he meant that he is getting new crank bearings

Post by **002-M-P** » Mon Dec 18, 2006 6:21 am

Yea...not replacing the crank, only the crank bearings...though I did see one on ebay for extremely cheap that needs repair yesterday.

Post by **lucky7** » Mon Dec 18, 2006 1:06 pm

fidanza and JGY flywheels for RB25 here:

http://www.jgycustoms.com/RB20DETparts.htm

Got the RB26...questions with pics

Got the RB26...questions with pics

Re: Got the RB26...questions with pics (002-M-P)

Re: (Carl H)

Re: (Darius)

Re: (Carl H)

Re: (002-M-P)

Re: (Spazz)

Re: (rustbucket)

Re: (002-M-P)

Re: (002-M-P)

Re: (HxC_Nismo)

Re: (002-M-P)

Re: (HxC_Nismo)

Re: (002-M-P)

Re: (rotorimp)

Re: (002-M-P)

Re: (Yellow4g63)

Re: (Darius)

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