oil pressure switch
Discussion
Toying with the idea of having a oil pressure switch and light on dash in conjunction with the pressure gauge.
Although I have read both 1/4 & 1/8 npt.
Am I picking up on something rare or wrong here? I have a oil pressure switch on my spare engine, will try that in my engine block and go from there if not.
From the Burton power magazine I have it all seems simple, just defining which thread.
Any suggestions?
I don't have a tap and die set for this thread so can't answer myself :-(
Although I have read both 1/4 & 1/8 npt.
Am I picking up on something rare or wrong here? I have a oil pressure switch on my spare engine, will try that in my engine block and go from there if not.
From the Burton power magazine I have it all seems simple, just defining which thread.
Any suggestions?
I don't have a tap and die set for this thread so can't answer myself :-(
You can buy 'T' pieces which have correct threads for press switch and gauge pipe/sender. Merlin Motorsport used to do them, but you should be able to get them from ordinray plumbers merchants (the bigger ones with more stock) as they are standard pipe threads on 1600 engines.
Some later engines (eg Cologne V6) went to metric threads, but you can still get adaptors to screw it all together.... The Cologne V6 has an imperial pipe thread for its temp sender, but a metric oil switch thread !
Some later engines (eg Cologne V6) went to metric threads, but you can still get adaptors to screw it all together.... The Cologne V6 has an imperial pipe thread for its temp sender, but a metric oil switch thread !
I see your point.
Why couldnt they make things simple??
Think I'll see if I can get to the local plumbers while at work and take my oil switch with me.
Also when the 't' piece is fitted, does it came a difference which is fitted at the end or side. To me, its just hydraulic and pressure should be the same at both options. But I've had some older people telling me its different, which I don't fully believe.
Why couldnt they make things simple??
Think I'll see if I can get to the local plumbers while at work and take my oil switch with me.
Also when the 't' piece is fitted, does it came a difference which is fitted at the end or side. To me, its just hydraulic and pressure should be the same at both options. But I've had some older people telling me its different, which I don't fully believe.
SOME ESSEX V6's ARE 1/8 NPT FEMALE SOME ARE 1/4 NPT (both taper)
I AERO-QUIPPED MINE TO A 'T' PIECE BEHIND DASH, FROM 'T' PIECE TO GAUGE & TO AN ADJUSTABLE PRESSURE SWITCH.
MINE SET TO 25 psi, HOPEFULLY OK TO SAVE ENGINE.
IF ANYBODY STILL USING ORIGINAL WEE NYLON LINE TO OIL PRESS GAUGE, CHANGE IT OUT FOR AN A-QUIP LINE YESTERDAY, IT's ALOT CHEAPER THAN A NEW ENGINE
CHEERS IAN
I AERO-QUIPPED MINE TO A 'T' PIECE BEHIND DASH, FROM 'T' PIECE TO GAUGE & TO AN ADJUSTABLE PRESSURE SWITCH.
MINE SET TO 25 psi, HOPEFULLY OK TO SAVE ENGINE.
IF ANYBODY STILL USING ORIGINAL WEE NYLON LINE TO OIL PRESS GAUGE, CHANGE IT OUT FOR AN A-QUIP LINE YESTERDAY, IT's ALOT CHEAPER THAN A NEW ENGINE
CHEERS IAN
.
Should make no difference what goes where on the tee, as you say, hydraulic pressure is a great equalizer!
1/8bsp is about 10mm dia.
1/4 bsp is more like 13mm dia.
Cheap enough... clicky
use appropriate open end spanners to measure.
Cut a slot into a piece of cardboard until thread will just slide in, measure width of slot with ruler (got one?
) It's a bit tight down in that gap were the oil pipe goes, remote tee, as suggested, sounds a good idea although when I fitted oil warning light to mine I did manage to get the tee down there.
Can't find a picture of the Taimar, this is my S bit different (electric pressure gauge) but does show i/4 to 1/8 reducing hex nipple into block and 1/8 tee for switch and sender. I went for stainless but brass or iron would do fine.
phillpot said:
Should make no difference what goes where on the tee, as you say, hydraulic pressure is a great equalizer!
1/8bsp is about 10mm dia.
1/4 bsp is more like 13mm dia.
Cheap enough... clicky
use appropriate open end spanners to measure.
Cut a slot into a piece of cardboard until thread will just slide in, measure width of slot with ruler (got one? )
It's a bit tight down in that gap were the oil pipe goes, remote tee, as suggested, sounds a good idea although when I fitted oil warning light to mine I did manage to get the tee down there.
Can't find a picture of the Taimar, this is my S bit different (electric pressure gauge) but does show i/4 to 1/8 reducing hex nipple into block and 1/8 tee for switch and sender. I went for stainless but brass or iron would do fine.
Mike, as always you have an answer and a picture - you legend!!!1/8bsp is about 10mm dia.
1/4 bsp is more like 13mm dia.
Cheap enough... clicky
use appropriate open end spanners to measure.
Cut a slot into a piece of cardboard until thread will just slide in, measure width of slot with ruler (got one?
) It's a bit tight down in that gap were the oil pipe goes, remote tee, as suggested, sounds a good idea although when I fitted oil warning light to mine I did manage to get the tee down there.
Can't find a picture of the Taimar, this is my S bit different (electric pressure gauge) but does show i/4 to 1/8 reducing hex nipple into block and 1/8 tee for switch and sender. I went for stainless but brass or iron would do fine.
Yes I have s ruler and open end spanners.
I'm happy to say its 13mm thread and so 1/4.
Onwards tomorrow to a plumbing place and an old car shop.
Not yet Mike no.
Payday tomorrow and a customer has a spare t piece. So gonna have a go when I get it. If not I'm gonna wait a bit longer and buy all the bits I need. It may end up being a 1/8 oil pressure switch then using my spare engine donor one.
Other option is my mate works with tapered airline connectors company and may have a bit I can use. Just gotta look in his van ;-)
Payday tomorrow and a customer has a spare t piece. So gonna have a go when I get it. If not I'm gonna wait a bit longer and buy all the bits I need. It may end up being a 1/8 oil pressure switch then using my spare engine donor one.
Other option is my mate works with tapered airline connectors company and may have a bit I can use. Just gotta look in his van ;-)
Do you speak from personal experience ?
It seems to have held out ok for the last 36 years or does that mean I'm on "borrowed time" ?
Do they split, fracture, pop of the end fittings or just chaff through if not carefully routed?
If gauge end failed a sump full of oil behind the dash would be interesting !!!!
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