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EJSenpai

1992 R32 GTR Atessa Leak at sensor/switch

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Hello everyone!

 

i know I’m new to the site but I need some help. I dropped my differential to get to the atessa and found the leak at the wiring of the pressure sensor/switch.

 

does Anyone know if this is a sensor or a switch? 

If a sensor, has anyone tried switch it with an oil pressure sensor or anything that might work as a replacement?

 

i can’t find a replacement and looking at nissans parts catalog and countless researching I don’t think you can buy it separately. I also had no luck on researching suitable replacements. 

15D92DE0-A594-44B3-BD52-20ADD0CD91F3.jpeg

0ABB0132-BB2B-43E4-B49A-5AFBB9A29481.jpeg

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I hope you can track one down.
If you cant you may have to repair the sensor assuming the sensor function is still ok.

It will require a good clean in the area that needs sealing and use something apropriate not just some glass silicon.
Maybe some good epoxy and after a sealant of high temp chemical resistance over it.

Treat it as a temporary and one day you may find what you need.
Good luck.

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How would you repair this sensor? I don’t think it’s repairable.

 

I know for sure it works it’s just leaking.

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Clean it realy good at the leak and use some high temp epoxy.
Once dry coat with a high temp sealant.
You will need to expose the leak for a proper job or you can risk not doing that and hope it seals.

Dont clean the inner side of the sensor.
You should be able to fix it with out removal. Just MAYBE the wire cover where it joins.

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Im not saying it will last but it will stop the leak temporary.

Just clean and epoxy glue the bugger.

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I’ll try that I have some epoxy and sealant. After it’s cures I’ll run the pump on bleed mode see if continues to leak. 

 

Im just hoping it won’t grenade the black cover since it does have pressure on the other side 

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Download the R32 GTR service manual from your uncle Torrence.  It is quite readily available.  The whole ATESSA system is detailed from page CH-57 onwards.

The black can is a pressure switch, as shown in thisimage.png.701818ff763fe147e92d8615edbe8ce5.png

You can get the part number for it from google, or a Nissan FAST and you can buy them from Amayama, RHD Japan, et al.

And don't use f**king epoxy to try to stick it together.  It's a hydraulic system. The pressures inside are very large and will laugh hysterically at a patch of epoxy.

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Ok it’s a pressure switch. Thank you

  find me the part number for that pressure switch then if you think it’s such an easy find. I’ve tried but all I keep getting is the whole unit with no replacement. The only replacement parts on the atessa I’ve found is the accumulator. I wouldn’t have posted otherwise 

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I’ll try that I have some epoxy and sealant. After it’s cures I’ll run the pump on bleed mode see if continues to leak. 
 
Im just hoping it won’t grenade the black cover since it does have pressure on the other side 
Without replacing it i think thats all that coul be done.
It will one day leak again and or grenade off.

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Download the R32 GTR service manual from your uncle Torrence.  It is quite readily available.  The whole ATESSA system is detailed from page CH-57 onwards.

The black can is a pressure switch, as shown in thisimage.png.701818ff763fe147e92d8615edbe8ce5.png&key=91b83ce3ed43285003e8eb84cedc65fcb771ec7d4a0e2d9566b6124465c5e273

You can get the part number for it from google, or a Nissan FAST and you can buy them from Amayama, RHD Japan, et al.

And don't use f**king epoxy to try to stick it together.  It's a hydraulic system. The pressures inside are very large and will laugh hysterically at a patch of epoxy.

Yes a much better idea.

What i dont get is you tell some one to start the car with ruber in the cylinder but god forbid you glue some plastic.

[emoji16][emoji23]

 

Exactly what i was talkin about in my ecu thread.

 

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7 minutes ago, Slap said:

What i dont get is you tell some one to start the car with ruber in the cylinder but god forbid you glue some plastic.

emoji16.pngemoji23.png

Oh, FFS!  A small piece of plastic inside the cylinder is less than no threat to the engine or the turbo.  That is why I gave that perfectly sound advice.

You cannot use epoxy to fix something that is running even 10 psi inside it, let alone the possibly hundreds of psi that you could expect in a hydraulic circuit.  There is a crack in the plastic, there is oil on the crack.  No glue is going to want to hold onto it properly anyway, let alone with that much force working against it.

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26 minutes ago, EJSenpai said:

Ok it’s a pressure switch. Thank you

  find me the part number for that pressure switch then if you think it’s such an easy find. I’ve tried but all I keep getting is the whole unit with no replacement. The only replacement parts on the atessa I’ve found is the accumulator. I wouldn’t have posted otherwise 

I don't have FAST installed on my PC, and I don't have a suitable VIN to make it easy(er) to search.

You could use FAST yourself.  You could also do a directed google search on these forums because I am sure I have seen any number of threads about that pressure switch over the last 20 years.

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I beg to differ on that.
If the crack is cleaned properly with some prepwash or similar and depending on how big it is... it may need some GOOD sealant in the crack first and an outer layer to stop exterior exposure of the epoxy.

THE PLASTIC HASNT EXPLODED AND SOME EPOXY IS WAY TOUGHER.

also it is a lot less detremental to the machine.

He said he couldnt track a piece... no one responded. So i thought id help.
Low and behold your here now doin the same shid again after giving me back handed courteous response earlier.

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I’m just looking to find a replacement pressure switch itself. Lol 

 

correction on that I have have used epoxy to seal an air line for my bags. Rubbed a hole in the line and nothing was open to get a replacement all I had was epoxy and sealed the air lines hole. Got me through a 3 hour drive back home. That line reached about 98psi at most.

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I’m not new to forums. like I said... I have a bunch of tools at hand. I have researched google, forums, even nissans parts database(through a friend who works parts at Nissan) and also nissans system says “if leaking at switch replace system” and it gives me the part to the whole thing. I just need the switch like I said. If you can’t seem to find it don’t bust my balls ive been looking for the past 48 hours.

Edited by EJSenpai
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Don't use epoxy man, the system pressurises to around 250ish psi and would be a waste of time. Had a quick look on Nissan fast for you and you are out of luck, you can't buy switch by itself, probably because of the sealed nature of the unit under such high pressure. New ones for the whole assembly is over $3000 too !

Anyway found some good second hand ones. One on gum tree for $165 and JDM garage in Gold coast for $180.

I'd be giving Brad a call at JDM garage and getting the entire R32 GTR pump assembly he has, as it looks pretty clean and he's really good to deal with. Cheers, Ben

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Jump on to em.
Cause if you get stuck using epoxy these guys are gonna molest us. [emoji23]

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Lol haha yeah agreed but yeah no I wasn’t going to use epoxy anyway. I just realized from being a mechanic that I’ve seen similar sensors leak into the wiring tracing all the way up to the plug. So either way it will leak somehow.

 

 

BK I think I may have found a replacement switch actually I just need to do a little more research but it’s from the same company that originally supplies Nissan with Pressure sensors, switches, and solenoids. Going to check in the morning. I’m in the US so it’s 1am at the moment.

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28 minutes ago, Slap said:

Jump on to em.
Cause if you get stuck using epoxy these guys are gonna molest us. emoji23.png

Expoxy is fine if it will hold. Do I think it will hold 250psi ?, no.

If you can get a switch great, at least there are some used full units around if you can't.

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On 3/4/2019 at 6:07 PM, EJSenpai said:

BK I think I may have found a replacement switch actually I just need to do a little more research but it’s from the same company that originally supplies Nissan with Pressure sensors, switches, and solenoids. Going to check in the morning. I’m in the US so it’s 1am at the moment.

Did you end up finding a replacement switch without replacing the whole pump? I'm not keen on buying second hand parts or paying $4660AU for a whole new pump.

Thanks

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