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#1
02-22-2008, 12:57 AM
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Low oil pressure alarm for 617.952
Not a new idea but this is the way I did mine.
My instalation of a low oil pressure alarm Tools needed: 1/8 inch pipe tap. 7/16 drill bit, 1 oil pressure sensor (for the “idiot light“ dash type low oil pressure warning light) I got from the junk yard off of a Chevy Monte Carlo of unknown year, about 4 feet of thin wire (I used telephone wire like you would use inside your house for a phone extension wire),and 12VDC Single Tone Pieso Buzzer 3-28VDC 5mA buzzer from Radio Shack part #273-060 cost less than $5. 1 female spade connector and some double stick foam tape. I removed the top cover from my oil filter and drilled a 7/16 hole between the cast reinforcing webs (located on the inside of the cover). I used the 1/8 inch pipe tap and threaded the hole from the out side of the cap. Cleaned it off with brake cleaner and re-installed in on the oil filter housing. Put pipe tape on the threads of the oil pressure sending unit and screwed in into the oil filter top cover (do not tighten too much as the you could split the cover and if it leaks a little it is easy to tighten more later). I needed a source of positive 12V that would only be on after the engine was started and turn off when the engine is turned off. I decided to tap into the + Heater Monovalve connector with the red wire. I attached the female spade connector to the black wire and slide it over the oil pressure sending unit spade connector (it is grounded through the oil filter/engine block).  I found an open hole in the fire wall rubber grommet over by the Power Brake Booster to run the wire through. And connected the black wire to the black Buzzer wire and the red wire to the red Buzzer wire. I put some double stick foam tape on the back of the Buzzer and stuck it on the upper frame of the parking brake. It works fine. 
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84 300D, 82 Volvo 244Gl Diesel 
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