How do you replace the Oil Pressure sender?
Thread Starter
Team Owner
Joined: Sep 2001
Posts: 62,097
Likes: 1,724
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
How do you replace the Oil Pressure sender?
Its on the back of the block, how the hell do you get it out?
Team Owner
Joined: Dec 2000
Posts: 21,092
Likes: 282
From: Phila., PA burbs
Re: How do you replace the Oil Pressure sender? (vader86)
I didn't replace mine, but when I just did my intake I got a good look at that thing. I think if you pull the distributor you should be able to get at it, but I'm only guessing.
Instructor
Joined: Jun 2002
Posts: 249
Likes: 0
From: Nashville TN
Re: How do you replace the Oil Pressure sender? (vader86)
Vader
On my 86 I pulled the wiper motor. Piece of cake from there, easy to get at.
You can get at it also by pulling the distributor, but that (to me) is more of a PITA.
Good luck Larry
:seeya :seeya :seeya
Life is not measured in the breaths you take, but
in what takes your breath away.
On my 86 I pulled the wiper motor. Piece of cake from there, easy to get at.
You can get at it also by pulling the distributor, but that (to me) is more of a PITA.
Good luck Larry
:seeya :seeya :seeya
Life is not measured in the breaths you take, but
in what takes your breath away.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: How do you replace the Oil Pressure sender? (Bear86)
Vader
On my 86 I pulled the wiper motor. Piece of cake from there, easy to get at.
You can get at it also by pulling the distributor, but that (to me) is more of a PITA.
Good luck Larry
:seeya :seeya :seeya
Life is not measured in the breaths you take, but
in what takes your breath away.
On my 86 I pulled the wiper motor. Piece of cake from there, easy to get at.
You can get at it also by pulling the distributor, but that (to me) is more of a PITA.
Good luck Larry
:seeya :seeya :seeya
Life is not measured in the breaths you take, but
in what takes your breath away.
Thread Starter
Team Owner
Joined: Sep 2001
Posts: 62,097
Likes: 1,724
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: How do you replace the Oil Pressure sender? (scorp508)
Does anyone have a picture of the sender, there seem to be several switches back there, and Ive never dug into it that much to see whats what. Which one is the pressure sender?
Also, when i went to the parts store and tried to get one, they pulled up 4-5 different parts for the oil pressure sender, and I didnt know which one to get.
:confused:
Also, when i went to the parts store and tried to get one, they pulled up 4-5 different parts for the oil pressure sender, and I didnt know which one to get.
:confused:
Melting Slicks
Joined: Jun 2000
Posts: 2,923
Likes: 1
From: Las Vegas NV
Re: How do you replace the Oil Pressure sender? (vader86)
I assume your 86 oil pressure sender is the same as my 88. I had to buy a special socket from an autoparts store (Pepboy) to take the sender unit out. The tool does say oil sender unit socket. I know for sure that we did not take the ditributor or the wiper motor out. Don't remember that we took the dist. cap off. The difficult part is when you have to re-connect the wire to the sendr unit, you have use your hand and plug the wire back in with no room back there.
Why do you need to change the sender unit?
Why do you need to change the sender unit?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: How do you replace the Oil Pressure sender? (scorp508)
My 85 has a dual terminal on it, if you take the distributor out it is extremely accessible, just mark the distibutor beofre you pull it. Or you can take off the wiper cover and then its still tought to reach. Wiith the distributor out it is,,, butt naked back there, you'll see stuff you might not want to see,,,, just kidding!
Also, the big, cannister looking deal on the same hex post is the oil pressure sender, they are only $13 so change it while you are back there!
:smash: :smash: :smash: :smash: :smash: :smash:
Also, the big, cannister looking deal on the same hex post is the oil pressure sender, they are only $13 so change it while you are back there!
:smash: :smash: :smash: :smash: :smash: :smash:
Team Owner
Joined: Mar 2000
Posts: 83,381
Likes: 87
From: Boston, MA
Re: How do you replace the Oil Pressure sender? (ld85)
Also, the big, cannister looking deal on the same hex post is the oil pressure sender, they are only $13 so change it while you are back there!
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: How do you replace the Oil Pressure sender? (scorp508)
Also, the big, cannister looking deal on the same hex post is the oil pressure sender, they are only $13 so change it while you are back there!
[whispers] Isn't that what he was asking about to begin with?[/whisper]
[whispers] Isn't that what he was asking about to begin with?[/whisper]
Any way change both of them while your back there!
(too many fumes from pulling the fuel pump) yeah right :conehead
Team Owner
Joined: Mar 2000
Posts: 83,381
Likes: 87
From: Boston, MA
Re: How do you replace the Oil Pressure sender? (ld85)
Hmmm... my oil temp sender is just above the oil filter. My oil pressure cutoff switch is next to the pressure sender though. Are 85s different?
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: How do you replace the Oil Pressure sender? (scorp508)
Hmmm... my oil temp sender is just above the oil filter. My oil pressure cutoff switch is next to the pressure sender though. Are 85s different?
Anyway you are correct, the oil temp sender is above the oil filter and the one next to the oil pressure sender , I thougt was an oil temp to the ECM sesnor, evidently its a "cutoff switch", yes?
One is 3-wire, one is 1-wire. That's from a 1990.
Le Mans Master
Joined: Mar 2001
Posts: 9,464
Likes: 1
From: Modesto CA
Re: How do you replace the Oil Pressure sender? (CentralCoaster)
On this pic:
Why is there two different little doodads? Is for the senSOR and the other the senDER? Gosh, hope NEITHER of mine EVER go out!
Although, on my 85, I had my oil pressure go up to 85psi and SIT there. (Which in turn scared the crap outta me!) Then I found out, that it just meant the connector had came off the terminal in there. So I reached in and plugged it back in and voila, good as new! :)
EDIT: Ok, I'm a dumarse. The factory actually puts a Cut-Off switch?!? Wow! Something that'll actually SAVE our motors! GO GM!
[Modified by TIMSPEED, 2:36 AM 7/11/2003]
Although, on my 85, I had my oil pressure go up to 85psi and SIT there. (Which in turn scared the crap outta me!) Then I found out, that it just meant the connector had came off the terminal in there. So I reached in and plugged it back in and voila, good as new! :)
EDIT: Ok, I'm a dumarse. The factory actually puts a Cut-Off switch?!? Wow! Something that'll actually SAVE our motors! GO GM!
[Modified by TIMSPEED, 2:36 AM 7/11/2003]
- 1986 Original Owner -
Joined: Apr 1999
Posts: 3,193
Likes: 139
From: North Yorkshire, England
Cruise-In I Veteran
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In IV Veteran
Cruise-In VII Veteran
Re: How do you replace the Oil Pressure sender? (ld85)
What exaclty is the cutoff switch, is that in case oil pressure drops below a point that the ECM says , kill the engine?
Please don't ask this. We've been through this in another thread where there are claims that the oil pressure switch signals the ECM to disable spark. I say no, another says yes.
Vader86 you can really help out with this debate if while you're back there you disconnect the oil pressure switch and try to start the car. Obviously this is going to have to be with the distributor back in and a known good fuel pump relay. Get everything back working and engine running, but leave the wiper motor out so you can get back there. Once you're satisfied all is back to normal, reach back and disconnect the oil pressure switch, the two wire one and try to restart, let me know what happens. It would be a big help. BTW if your '86 is unmolested, you may fing a black plastic retainer around the oil pressure switch. Thanks.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: How do you replace the Oil Pressure sender? (Ray Quayle)
It cuts the fuel pump, yer right. :yesnod:
There are quite a few fail-safe things on the c4. The low pressure switch on my 4+3 od saved me from an expensive and/or time consuming rebuild.
There are quite a few fail-safe things on the c4. The low pressure switch on my 4+3 od saved me from an expensive and/or time consuming rebuild.