oil pressure sensor

i have an 87 chevy s-10 truck recently i have been pressure problems were when it warms up and i apply the breaks the oil presure just drops to nuthing and the light check gauges lights. i talk toa few people and they said its just prolly the oil pressure sensor so i wnet an bout it and found it in my truck but its a pain in the ass to get to. does anyone have any suggestions on how to get the old one out and if you need any tools?

thank you for your help
-Bigdog889

Hey i have an '89 s 10 bla. I have the same problem it hovers above 40 until it gets warm and then it drops to just above 0 and the check lite comes on when i come to a full stop. Where is the sensor and the sender ??? is what i would like to know i havent looked into it cuz i wasnt to worried but if u found it and the parts arnt too expensive maybe ill swap it out

IT is on the back side of the engine behind the distributer and it is a pain to get to . I have a 3 inch body lift which made it easier but you still have to lay on the engine to do anything with it

well 89 if your blazer is anything like my truck , when you pop the hood and look faceing the wind sheild mine was right of the engin block towords the back and way down. right beside the stearing colom. that not a very good explanation but if you need more info i can prolly take a picture when i get home later.

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still no reply on how to get that bugger out? its suc a tight squeeze i dont want to bring it in to a shop and have them chage me an arm and a leg if i could do it my self.

well 89 if your blazer is anything like my truck , when you pop the hood and look faceing the wind sheild mine was right of the engin block towords the back and way down. right beside the stearing colom. that not a very good explanation but if you need more info i can prolly take a picture when i get home later.

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still no reply on how to get that bugger out? its suc a tight squeeze i dont want to bring it in to a shop and have them chage me an arm and a leg if i could do it my self.

open end wrench, bent open end wrench, vice grip pliers. if liek mine you'll get more room by removing oil filter.

speaking of oil filter have you got one of the good ones mentioned in this forum to be sure you have as much oil and oil pressure up top as possible ?

your saying it drops to 0 psi when you apply brakes and it has warmed up, thus thinner and less pressure, suggests to me you may only need more oil in there. since after running a bit pan oil has pumped oil up into engine areas. braking moves what little is left in pan forward, leaving nothing for oil pump maybe.

some models require oil level to be about a litre above the full mark according to various sources. otherwise 1st thing likely to wear out too soon is rear main crankahaft bearing, indicated early on by rumbling sort of vibration.

also i suggest full synthetic oil which reduces leaking at valve quides, rings, seals and gaskets and maintains viscosity/pressure at all temps better.