Lotus Elan

Oil pressure gauge take-off

PostPost by: ill_will » Thu Mar 28, 2024 8:48 pm

For years I'd assumed that the fitting on my engine where the oil pressure gauge pipe attaches was original, but after some reading here and consulting the parts manual it doesnt appear to be. It looks a bit home made, but frankly many original bits do too.

IMG_20240328_202930__01.jpg and


Measuring, it looks like the:

- thread into the block is 1/4"NPT (18TPI)
- male thread for pressure gauge pipe is 1/8" BSPT (28TPI)
- female thread for oil switch is ? It is tapered, measures 0.382 to 0.394" diameter, at 26TPI.

Any ideas?
ill_will
Second Gear
Second Gear
 
Posts: 189
Joined: 18 Apr 2008
Location: SE London, UK

PostPost by: ncm » Fri Mar 29, 2024 9:37 pm

Looks like a standard aftermarket T piece.
Is the electrical sender a high pressure (20psi?) switch?

Brian.
ncm
Third Gear
Third Gear
 
Posts: 243
Joined: 02 Jun 2006
Location: Derbyshire

PostPost by: mbell » Sat Mar 30, 2024 5:06 pm

The female will be for pressure sensor. Will be 1/8" npt or BSP which are very close in sizing for 1/8".

Kind of surprised it's a mix of npt and BSP....
'73 +2 130/5 RHD, now on the road and very slowly rolling though a "restoration"
mbell
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2704
Joined: 07 Jun 2013
Location: Austin, TX (UK Ex-pat)

PostPost by: ill_will » Sun Mar 31, 2024 1:18 pm

Thanks for the replies.

Brian, you're right, I think it is a pressure switch. It has 1,5 written on it so I guess 1.5 bar perhaps. At 26TPI it could be 1.0mm pitch perhaps.

I assume the 'standard' straight adapter which goes block to pressure gauge pipe must also be a mix of NPT and BSPT?
ill_will
Second Gear
Second Gear
 
Posts: 189
Joined: 18 Apr 2008
Location: SE London, UK

Total Online:

Users browsing this forum: No registered users and 15 guests