Hey guys,
I bought an autometer oil pressure guage because I've got a new engine, and the original guage is finished - surprise, surprise. The problem that I'm having is that the autometer sending unit thread is 1/8", while the thread in the block for the oem unit is metric. I've looked all over for a metric/imperial adapter, but no one can help me. Any ideas? Has anyone else put one of these in? Is there somewhere else on the block I can put it? Thanks for your help,

Nick

P.S. I used to post frequently on the OLD FC3S forum, but have been offline since I blew the engine. It's good to see that there are some familiar names on this board!

 

The Mazda OEM oil pressure gauge is 1/8"BSP-28 - it's very close to the aftermarket 1/8"NPT-27.&nbsp If you're going to replace the OEM unit, put some thread sealant on the sensor and crank it in as hard as you can.&nbsp Just keep in mind, that you probably can't put back a Mazda OEM sender after you're done this.

Keep in mind to use the hex shank closest to the threads when you do this.&nbsp Do NOT crank the larger pressure sensor body, as this will usually kill an internal connection if the crimp body slips!&nbsp Don't ask me how I know this...


-Ted

 

Thanks for the advice, and sorry about your lesson! The thing is that I can't even get the new sending unit against the block because it hits the bracket that holds the oil filter. Because of this I had to buy a 1/2" long adapter that would enable the unit to clear the bracket. The adapter thread is 1/8" NPT, but I cant get the thread to start in the hole at all. Can I buy a line with imperial at one end and metric at the other? Would that work? Thanks again,
Nick

 

Oh yeah, totally forgot about the extra long shaft on the Mazda OEM unit. That's right - an "extender" would be required.&nbsp If the threads don't catch, try and get an 1/8"NPT-27 tap, and tap the hole first.&nbsp The 1/8"NPT tap should be easily found at any local hardware store.&nbsp This should let your aftermarket oil pressure sender thread right in after - don't forget the thread sealant or teflon tape!



-Ted

 

You need a 1/8 BSPT to 1/8 NPT adapter to put it together correctly.
Autometer sells it, I bought some on the net awhile ago,
I did a search and found a company in FL thats sells them.
I will see if I can find the link.

Rotry_pwr

 

There it is:

http://globalfluid.com/search_result...facturer=33000

Rotry_pwr

 

Thanks for all the info, I'm going it out!

Nick

 

Mazda trix sells a Racing beat adapter. IT has ports for temp and pres. www.mazdatrix.com

James