rotorsownyou7

I got an aftermarket oil pressure gauge (Greddy), and I need to know ho to install it, tough to do with directions in Japanese Anyway, I don't care if I can disconnect the stock one, I heard you can just disconnect it and take the new unit and replace it. Question is where is the old unit? I already have the gauge wired and ready to go, just need to plug in the sensor.

rotorsownyou7

Anyone?

moconnor

iTrader: (14)

The stock oil pressure sender is to the bottom right of the lower rear spark plug.

Where's your FSM?

rotorsownyou7

I don't know! So can you just screw it out? Will the new one just screw back in?

rx7dv8

Greddy oil filter block adapter is all ya need.

https://www.rx7club.com/showthread.p...+block+adapter

moconnor

iTrader: (14)

You can just screw out the stock sender, though clearance issues make it fairly hard to get a good grip on it.

I don't know what the thread specifications are on your new sender. There is an unused knock sensor location just above the trailing (lower) rear spark plug that you can use for a test fit without removing the stock sender. It has the same size and thread pitch as the oil pressure sender.

I believe that the oil pressure sender hole in the block is 1/8" BSPT (British Standard Pipe Tapered). You may have to buy a BSPT to NPT adapter (aftermarket senders are usually NPT).

mad_7tist

the greddy oil pressure sending unit will just screw right in. at least mine did a few years ago. the stock sending unit is the big *** sesnor screwed into the rear drivers side of the engine. right under the oil filter. it is only for the stock gague. dont go crazy with tightening it as it is tapered. just tight enough so it wont leak

rotorsownyou7

So which is it? Do I need that block thing or will it just screw in and stay fine?

rx7dv8

Get the greddy adapter

moconnor

iTrader: (14)

You had better make sure that the Greddy sender really is BSPT before doing this. An NPT sender will happily screw into an aluminum BSPT hole because the specifications of both are fairly close. However, an eventual oil leak is possible and you will have to tap the block to accept an NPT fitting to cure it.

My guess is that the Greddy sender is 1/8" NPT and that you should buy an NPT to BSPT adapter to make sure it fits properly. Your local NAPA/Autozone etc. should have one of these for $10 or so.

mad_7tist

depends on what you want it fits just fine in the stock spot. but you have a dead gague in the cluster. the pedesatl is kind of dopey imho. clearence is a pain on the filter etc

maxcooper

I replaced the stock sensor and it works fine with no leaks. I have a different gauge, but I believe the threads on my sensor are 1/8 NPT. The stock setup has a metal extender/adapter thing screwed into the housing/block, and then the stock sensor screws into the adapter. I kept the adapter screwed into the housing/block and screwed my aftermarket sensor into the adapter. Works great; no leaks, and no additional difficulty replacing the oil filter.

-Max

moconnor

iTrader: (14)

So basically the stock sender comes with an 1/8" NPT to BSPT adapter? I wish I had know that before throwing my old one away.

maxcooper

I don't know, but I can tell you that my 1/8 NPT sensor threads right into the adapter thingy. 1/8 NPT and BSPT are so close that it might just work anyway, even though they really aren't the same threads.

How could you miss the adapter? It isn't small and is clearly a separate piece from the stock sensor.

-Max

rotorsownyou7

Where can I get this? Why do I need it? I read that thread but I do not understand?

rx7dv8

rotorsownyou7

Oh, ok, got it.

rotorsownyou7

Damn double post!