Subject	Curiosity killed the sensor >>>>
Posted by	Ash's Z on March 14, 2005 at 12:34 AM
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Message	Been trying to figure out how the oem oil pressure sending unit works as I have a few of them here and wanted to use one for a different purpose. Couldn't figure out any logic on the terminals, so I decided to pull it apart to see. Was suprised to find that it has mechanical components to it.. It is just a variable resistor that is mechanically actuated by the pressure on the small piston. It can actually be calibrated too as there is a locknut on the tiny pin riding the piston. I couldn't figure out anything based on the terminals - no resistance, no voltage, nada.. After opening it, you can see that in the rest state, the rheostat wiper blades are not in contact with the resistor windings.. It also makes a lot of sense as to why an old sender unit seems to make the oil pressure gauge hang around 30psi..... [ ashspecz.com ] [ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor. Albert Einstein
Follow Ups	Curiosity killed the sensor >>>> - Ash's Z 00:34:17 03/14/05 welcome to the ghetto.. - Red October 00:51:54 03/14/05 thats pathetic - TARGETZ 06:08:28 03/14/05 probably was made by JECS, not nissan (n/m) - Red October 06:44:06 03/14/05 not really - aliaZ 08:19:09 03/14/05 no biggy..have u seen how oil pumps work? - College Boy 12:15:44 03/14/05 thanks for the info. (n/m) - E=mz² 07:27:13 03/14/05 I took an old one apart about a month ago also. With - DWard(NC) 07:28:01 03/14/05 Trying to make a liquid aluminum pressure gauge? ;) (n/m) - Kez43 10:37:56 03/14/05 If you ask me, that's good engineering - jkeyser14 13:10:06 03/14/05 IF you do pull it apart, you are going to pull the two wires - Ash's Z 13:29:27 03/14/05 thanks for the advice - jkeyser14 15:49:06 03/14/05 Don't do that .. drill the hole bigger, problem solved - PLEAZURE in CA (SD) 16:40:10 03/14/05 ... - Milo (Sport Z Magazine) 14:35:30 03/14/05
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