Early Warning Systems

Oil pressure switches

Low oil pressure switches are offered as alternatives to the" whoops its too late" pressure warning transmitters fitted as original equipment, ours provide a warning when the oil pressure drops below the desired running pressure, they can irritate by actuating a warning when the engine is ticking over but are absolutely essential for spotting signs of trouble in a competition engine.
They have a 1/8 NPTF thread so screw into matching thread on T piece and use a suitable pressure gauge adapter on the thread vacated by original transmitter. We also offer a fuel pressure warning switch for carburettor engines, an essential to warn of failing pumps, blocked lines or filters all of which can cause a weak mixture to melt pistons in seconds on a highly stressed engine. A nil pressure fuel switch may be fitted downstream of an electric fuel pump to turn pump off in the event of an accident resulting in fuel line rupture etc.

T pieces and oil pressure gauge adapters.

All engines have a tapping on an oil gallery to take the oil pressure warning transmitter, we make a range of T pieces to screw into this tapping, T pieces have one male thread to screw into the oil gallery, a female thread to take the original transmitter and a female 1/8 NPTF tapping which allows a pressure switch or a 1/8 BSP female pressure gauge line to be attached via a MMS10-3-3 adapter.
The chart below shows tapping thread for most engines.
Alfa-Romeo Alfasud M14x1.5 Colt 1/8BSPT Lada M14x1.5 Saab 1/8NPTF

Alfa-Romeo remainder

M10x1 Datsun 1/8BSPT Lancia M14x1.5

Simca

M12x1.5
Austin/Morris 1/8NPTF Fiat M12x1.5 Mazda 1/8BSPT

Skoda

M10x1
BMW up to 1969 M10x1 Ford up to 1971 1/8NPTF Opel up to 1973 M14x1.5

Subaru

1/8NPTF

BMW from 1969

M12x1.5 Ford from 1971 1/4NPTF Opel after 1973 1/4NPTF

Toyota

1/8BSPT

Chevrolet

1/8NPTF Hillman 1/8NPTF Porsche M10x1

Triumph

1/8NPTF

Chrysler/Talbot

1/8NPTF

Holden

1/4NPTF Renault M14x1.5

Vauxhall

1/4NPTF

Citroen CX

M14x1.5

Honda

1/8BSPT Rover 2000 3/8BSF

Volkswagen

M10x1
Citroen remainder M12x1.5 Jaguar/Daimler 1/8NPTF Rover V8 1/2UNF

Volvo

1/8NPTF

Warning lights

These are of little use if they are not immediately visible, ours are 29mm diameter with a choice of red, yellow, green, blue or clear lens, they have a removable diffuser under the lens which may be titled using dry print lettering. A T5.5 side contact bulb is accessed from the front and is sealed against ingress of dust, oil and water. Weight is 1.5 grams.

Last Revised: 16 May, 2001 Copyright 2000 Think Automotive Ltd. All rights reserved.


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