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Old 04-07-2009, 08:32 PM   #1
HUMVET51
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Question Oil Pressure Sending Unit - Need Help

Hey guys and gals!! I need some solid answers. I may have to replace my oil pressure sending unit and I woild like to know a few things. 1st- what does a job like that run at the dealership? 2nd-whats the average cost and how much time would it take? 3rd- whats the average psi reading on the oil gauge at operating temp? 4th- whats the average oil temp at operating temp? 5th- whos going to the birthday bash in Bowling Green April 23rd?? Thanks Goodnight.
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Old 04-07-2009, 11:15 PM   #2
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I renamed your thread in hopes to get the right eyeballs to see your questions.

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Old 04-07-2009, 11:27 PM   #3
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Junkman. In a nutshell.. find him.
I have a magnuson and its impossible to get too. IMPOSSIBLE.
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Old 04-08-2009, 08:33 AM   #4
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oil

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Originally Posted by HUMVET51 View Post
Hey guys and gals!! I need some solid answers. I may have to replace my oil pressure sending unit and I woild like to know a few things. 1st- what does a job like that run at the dealership? 2nd-whats the average cost and how much time would it take? 3rd- whats the average psi reading on the oil gauge at operating temp? 4th- whats the average oil temp at operating temp? 5th- whos going to the birthday bash in Bowling Green April 23rd?? Thanks Goodnight.
do not go to the dealer .... any mech worth his salt can do it ... i think i got the sender for $30 ... another 30 to do R&R it's on top of the eng way in the back just under the intake ... it's not a big deal to get out a little turning and bitching and its done ....when it fails pres. will go to the roof on your gauge .... but eng is ok reg. oil pres is based on your oil wt./grade ... i like 50lbs ... so i use 5 royal purple 10/40 and the rest 5-30 .... just had my sender changed was not as big a deal as the dealer wants you to think .....
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Old 04-08-2009, 08:35 AM   #5
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Oil sending unit

The unit seats under the intake manifold, close with the firewall.
Some people said that can be done without removing the intake, I called
Boolshit!! Sorry for the bad word. With mechanical aptitude in four hours and a few cold beers can be done. One thing, I changed mine twice, and for some reason fails in about 6 months.
So guess what!! I just ignored the gauge!!!!
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Old 04-08-2009, 08:59 AM   #6
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The unit seats under the intake manifold, close with the firewall.
Some people said that can be done without removing the intake, I called
Boolshit!! Sorry for the bad word. With mechanical aptitude in four hours and a few cold beers can be done. One thing, I changed mine twice, and for some reason fails in about 6 months.
So guess what!! I just ignored the gauge!!!!
we changed my without removing the intake !
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Old 04-08-2009, 09:34 AM   #7
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The sender is located on the drivers side rear of the engine behind the intake. Find yourself a good shop that you trust to perform the work
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Old 04-08-2009, 11:59 AM   #8
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It is only about a 30-60 minute job to pop intake off and then swap the sensor.
You can do this yourself and save the hassle and labor costs, the rubber seals on intake do not even have to be replaced.

It can be done without taking intake off but that means cutting a hole in the back area by firewall and then patched when done but that is the stupid way

Good time with intake off to replace weak knock sensors or build a damn around them with silicon so that water does not drain down and degrade them.

Normal PSI is about 40.
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Old 04-08-2009, 03:43 PM   #9
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Thumbs up!

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It is only about a 30-60 minute job to pop intake off and then swap the sensor.
You can do this yourself and save the hassle and labor costs, the rubber seals on intake do not even have to be replaced.

It can be done without taking intake off but that means cutting a hole in the back area by firewall and then patched when done but that is the stupid way

Good time with intake off to replace weak knock sensors or build a damn around them with silicon so that water does not drain down and degrade them.

Normal PSI is about 40.
Amin to thatBuddy!!!
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Old 04-08-2009, 04:05 PM   #10
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had mine done at dealership because i have extended warranty. ran about 400 bucks. think that junkman has a thread to move the sending unit to a place where you reach it without removing the intake. if you pull the intake, might as well replace the 2 knock sensors that under there too.
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Old 04-08-2009, 06:25 PM   #11
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Quote:
Originally Posted by racingvette View Post
It is only about a 30-60 minute job to pop intake off and then swap the sensor.
You can do this yourself and save the hassle and labor costs, the rubber seals on intake do not even have to be replaced.

It can be done without taking intake off but that means cutting a hole in the back area by firewall and then patched when done but that is the stupid way

Good time with intake off to replace weak knock sensors or build a damn around them with silicon so that water does not drain down and degrade them.

Normal PSI is about 40.
Partially correct. First of all, if you have never done it before, there is no way that you will do this in 30 minutes. After you've done it once or twice, you will get a lot faster at doing it. You can move the intake forward just enough to replace the OPS, and it does not involve cutting a hole in the firewall.


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had mine done at dealership because i have extended warranty. ran about 400 bucks. think that junkman has a thread to move the sending unit to a place where you reach it without removing the intake. if you pull the intake, might as well replace the 2 knock sensors that under there too.
Actually, I'm about to post a thread on this repair. The difference being that I am NOT going to put the sensor back into the stock location. I'm relocating mine just under the fuel rail covers, courtesy of a guy with a monster Vette who had an idea. That idea?

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Old 04-08-2009, 07:00 PM   #12
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Quote:
Originally Posted by Junkman2008 View Post
Partially correct. First of all, if you have never done it before, there is no way that you will do this in 30 minutes. After you've done it once or twice, you will get a lot faster at doing it. You can move the intake forward just enough to replace the OPS, and it does not involve cutting a hole in the firewall.
Read it again 30-60 minutes.
I've done it in 30 as it is a simple process.

Only two concerns when putting intake back on and that is the small vacuum hose for HVAC to back of intake is back on and the installer uses the proper sequence in torquing down intake bolts.

As to just sliding intake just forward to reach sensor is a waste as this is the time to take intake off, check intake gaskets for leaks, swap knock sensors or at the least take them off and put teflon on threads to reduce false knock, take right AIR valve off and clean it and check small hose for HVAC router for leaks.
I'd even say for the few bucks is get a new MAP sensor as they do tend to degrade.

Paying anyone $400 to replace oil sender sensor is nuts.
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Old 04-08-2009, 07:26 PM   #13
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Originally Posted by racingvette View Post
Read it again 30-60 minutes.
I've done it in 30 as it is a simple process.
Read my post again. A noob is not going to do this in 30 minutes. I don't want this guy to get a false sense of security if he decides to do this.
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Old 04-08-2009, 08:43 PM   #14
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I appriciate all the advise guys..BUT i would still like to know what is a NORMAL operating temp for the C5 ZO6 and if I dont get it replaced right now is it a BIG DEAL??
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Old 04-08-2009, 08:47 PM   #15
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I did not want to move mine from the stock location and since others have had SOOO many problems with replacements (and I plan on keeping the car until I die), I decided to cut the hole under the cowl. Of course, this was not a quick process the first time as (in my case) I actually molded, finished and painted a fiberglass replacement piece that attaches with wing nuts and a gasket - really overkill since I am the only one that will ever see it!

On the plus side, swapping out the next time (if necessary) should take about 15 minutes. I really hated the idea of unseating the gaskets, etc. on the intake and take a chance of unnecessarily introducing a leak or other engine problem just to swap out a sensor (which should be a 5 minute job)! If I really thought it would be a once in the life of ownership thing... maybe? On the other hand, if I REALLY, REALLY believed I would have to do this more than once or twice, then I would go the re-locate kit that Junkman posted - it looks like a first-class solution.

Quote:
Originally Posted by Junkman2008 View Post
I don't want this guy to get a false sense of security if he decides to do this.
I concur... I hate to give anyone a false sense of security... this may very well be the hardest thing you ever do in your life, so set aside at least 3 weeks to be safe!
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