I'm getting close to getting my rebuilt engine back into the S5T and just like most other RX7 owners have found the stock oil pressure gauge extremely unreliable (...or is it?). Since oil pressure is critical for rotaries, I want some accurate measurements when I go to start this thing up.

From what I've read on this forum, the common solution seems to be to replace the stock gauge and sender with a mechanical aftermarket unit. My question is, has anyone tried to disassemble and clean out their stock sender in an attempt to get more accurate readings? I would imagine that after 17 years there would be a fair bit of gunk built up in there...

Anyone come across any write-ups on how to do this?

Thanks for reading,
- TT

 

You're more apt to damage trying to take it apart.
Just replace it with a new OEM one.


-Ted

 

Thanks for that Ted,

Yeah, I actually had an attempt at disassembling the sender shortly after I posted... It didn't seem like there was any easy way of doing it, so I chickened out lol. To me it looked like it wouldn't possible to re-seal the sender properly after bending the metal housing back.

Cheers,
- TT

 

From my limited understanding of electronics, I believe an oil pressure sender being innacurate means that it is inherantly innacurate. You'd need an aftermarket sender if you want accuracy. From what I understand about pressure meters, the sender's location could also make it innacurate if there's a lot of flow velocity or turbulance there, which means you'd be screwed anyway.

And from what I remember from a little engine lab at school, oil pressure doesn't need to be accurate. A ball park figure is good enough.