Hey guys, i was loooking under the hood last night and noticed somthing that may be wrong but im not sure. ok, on my type engine where the oil filter conects right there i think thats the knock sensor if im correct. i noticed to the left of the sensor is an opening like a screw went there or somthing. nothing seems to be coming from it no oil or coolant, but wondering if anyone knows if thats normal or does a screw go there or what. can somone send a picture of the thing so i can tell if im just triping please. thanks

 

Well apparently you have one of the later 2.8s, like mine. On the earlier 2.8s, there were two sensors that went in that area, oil pressure switch and gage, so they had two holes for it. On the later models, they combined the two and plugged the other hole, and thats what you see there, a oil pressure switch (for the fuel pump) and a sensor for the gage.

 

soo nothing is wrong right? just to let you know, my oil presure gage does not work. Is a oil presure switch suppose to go there on my modle? just to in form you, mine is fuel injected.

 

If your oil gage doesn't work, that means the switch is busted, because on the later, I think 1987-up, 2.8s combined the two into one. That metal cylinder w/ the connector is the oil pressure switch/gage sender. Replace the sensor, its like $25 at Autozone. Its easy to replace, unscrew it and screw in the new one.

Nothing is wrong because that was a provision for older 2.8s and they just got lazy and kept the same fittings.

 

The Oil Pressure Sender and fuel Pump Oil Pressure Switch were still two seperate units on the 1989 2.8L engines. This info from the 1989 camaro GM service manual.

 

Mine looks nothing like that diagram. I have a single sensor. I'm sure my car is an '89 I think your manual is wrong, you know how GM reuses their diagrams...

 

You might also have a late production model that had the newer single unit. If I remember correctly the early production models for 89 still had the two unit system and that is what is shown in the manual.

 

good lookin out. so what should i do? is that thing im seeing nothing or does somthing go there? based on the picture it looks like somthing goes in there. im not sure if the advice both of you guys are giving me indicates putting and changing somthing or it being a vacant hole that GM was to lazy to do anything about. note that there is no check engine light on in my car. Based on the picture, my vacancy is where the oil sensor is going and its a pretty long sensor longer than the one in the picture. also, can this cause your car to run bad? what happens if its not in? and why the hell is it called a fuel pump oil switch if my pump is in the gas tank?

 

when GM casts a tapp into a engine, they leave it there. on SBCs for example, theres two often used tapps for oil pressure. one on the top, on the back china wall, and one just above the oil filter.
early 3rdgen V8s had the gauge sender on teh back wall, and the fuel cutoff above the filter... later ones had a gauge sender and switch assembly in one.. and thye placed it on the side above the filter.... they just plugged the other hole.

thats normal. they didnt "get lazy"

"getting lazy" would be not drilling and tapping the hole so that when you swapped motors you had to do it yourself... thats lazy.


trace down what your oil gauge goes to, check its operation, then replace the correct sending unit.

 

oh okay. this is good info guys. i was thinking of going to a junk yard and looking at some 2.8's there, but it appers that i may see some different setups than mine is this correct based on the year?

 

Check to see if you have an extra connector down there that's not being used. Here is a picture of the new style unit that 89v6fbird & MRDude_1 are talking about. See if the one on your car looks like it.

 

If you got a check engine light, pull the codes. It's under the FAQ on the main page of this site www.thirdgen.org

Now if your sensor is bad, just get a new one. If the gage never moves from 0, then the sensor is bad, If you pull the ELECTRICAL connector from the sensor and you see oil, you'll see the problem. This is what mine did when it went bad.

 

yeah my sensor looks like that one, but the setup in the picture of the bottom is different on the engine. its more like the first one you sent me. ill check things out this weekend. no i have not gotten a check engine light for anything. thank you very much the both of u. you guys are great.