Oil pressure sender relocate
#1
Safety Car
Thread Starter
Oil pressure sender relocate
EDIT Go to post #29 and #270 for the latest and greatest Buick Sensor Mod. EDIT
Getting ta ta ta tired of pulling the intake to change the oil pressure sending unit----on a weekly basis. Yes, I'm torquing it properly.
Until such a time that GM, Standard, BorgWarner, Niehoff, Wells, or whoever else sells these things (all evidently made at the same manufacturer in Mexico), I'm going to do this.
Basically I'm going to relocate the sensor up top next to the left hand fuel rail-----a section of manual oil pressure gauge hose plumbed in to get there. You can buy this hose and fittings as a kit. Each end of the plastic hose has compression fittings ending up with 1/8th inch pipe thread ends.
I took one of the old sensors, drilled the center out and tapped it to 1/8th inch NPT. Then screwed in the hose's fitting. Very easy---looks good:
BTW did you ever see how frigging COMPLEX GM made this sensor? Inside there is a host of surface mount resistors, capacitors, and even an IC! Come on!
OK, ok the engine side is taken care of. Now for the sensor itself. I started out with a round chunk of billet. Hexed off the outside. Drilled one end and tapped it to the sensor's size---M16 X 1.5. Ok I cheated---I used a 5/8 -18 NF which is real close----and so is a 3/8 -18 NPT. And of course on the other end I tapped it to 1/8th inch NPT. Here's a pic of it---you'll also see it in the first picture also with the hose fitting installed. You'll see the plastic pressure hose looping down and around---leading to the back of the block.
And here is a shot of it in place. The connector reaches fine. I plan on securing it to the fuel rail and/or bracket.
Now if I had access to a CNC I'd probably make up a bunch of these----but my lathe is one step up from a wood working unit and my mill isn't much better. Took me half a day. Just how did we churn out thousands of P-38's back in the day before CNC---or even digital readouts??
Anyway I think there is a solution to making the adapter. And that would be the oil pressure sender from a 99 and newer Park Avenue. Looks to be the same unit with the same connector-----only it has what appears to be a 1/4th inch NPT end. In that case all you would need would be a double female to plumb to the oil line. I was just too cheap to order one of these sending units to find out.
Anyway this is my story and I'm sticking to it!
Getting ta ta ta tired of pulling the intake to change the oil pressure sending unit----on a weekly basis. Yes, I'm torquing it properly.
Until such a time that GM, Standard, BorgWarner, Niehoff, Wells, or whoever else sells these things (all evidently made at the same manufacturer in Mexico), I'm going to do this.
Basically I'm going to relocate the sensor up top next to the left hand fuel rail-----a section of manual oil pressure gauge hose plumbed in to get there. You can buy this hose and fittings as a kit. Each end of the plastic hose has compression fittings ending up with 1/8th inch pipe thread ends.
I took one of the old sensors, drilled the center out and tapped it to 1/8th inch NPT. Then screwed in the hose's fitting. Very easy---looks good:
BTW did you ever see how frigging COMPLEX GM made this sensor? Inside there is a host of surface mount resistors, capacitors, and even an IC! Come on!
OK, ok the engine side is taken care of. Now for the sensor itself. I started out with a round chunk of billet. Hexed off the outside. Drilled one end and tapped it to the sensor's size---M16 X 1.5. Ok I cheated---I used a 5/8 -18 NF which is real close----and so is a 3/8 -18 NPT. And of course on the other end I tapped it to 1/8th inch NPT. Here's a pic of it---you'll also see it in the first picture also with the hose fitting installed. You'll see the plastic pressure hose looping down and around---leading to the back of the block.
And here is a shot of it in place. The connector reaches fine. I plan on securing it to the fuel rail and/or bracket.
Now if I had access to a CNC I'd probably make up a bunch of these----but my lathe is one step up from a wood working unit and my mill isn't much better. Took me half a day. Just how did we churn out thousands of P-38's back in the day before CNC---or even digital readouts??
Anyway I think there is a solution to making the adapter. And that would be the oil pressure sender from a 99 and newer Park Avenue. Looks to be the same unit with the same connector-----only it has what appears to be a 1/4th inch NPT end. In that case all you would need would be a double female to plumb to the oil line. I was just too cheap to order one of these sending units to find out.
Anyway this is my story and I'm sticking to it!
Last edited by 426 Hemi; 07-04-2009 at 07:45 PM.
#2
Instructor
Member Since: Dec 2006
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We don't do it to customers cars (unless they ask) but for our own cars we've just lifted the wiper cover (the 5 pins and wiper blades) and cut a hole in the plastic tray underneath (about 4-5 inches square). I've got a deep socket that I turned down to be thin enough to fit between the crossover plug bolt and the sensor. We were having some problems with sensors for a while also. With this method I can change a sensor in about 20-30 minutes.
I'm not saying it's an elequent solution, but I am saying it works and you can't see anything when you put the cover back on. Just mentioning it as another alternative.
I'm not saying it's an elequent solution, but I am saying it works and you can't see anything when you put the cover back on. Just mentioning it as another alternative.
#3
Burning Brakes
Very interesting posts. The complexity of the sender probably explains its unreliability - it is in a high temperature, high vibration region and circuit boards are probably not that reliable in such a situation.
Is there anywhere else on the engine that one can tap into the oil pressure?
Is there anywhere else on the engine that one can tap into the oil pressure?
#5
Race Director
I can't tell you how many times I've had that plastic hose break or melt in my cars since '66...that being said, a better alternative to a nice modification might be some -3 or -4 braided steel line with correct AN fittings/ends.
#6
Safety Car
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CI 3-4-5-6-7-8-9-10 Vet
St. Jude Donor '07
That screws directly into where the original sensor was located.
#7
Safety Car
Thread Starter
Good point. When ever I've used any of this in the past I've tried to guard against any chaffing or heat. Many production vehicles use this tubing--including about every aftermarket mechanical oil pressure gauge.
#8
Le Mans Master
I can see how vibration would be an issue. I haven't had to do mine yet, and was thinking more "old school" thinking of the sensors with the large "dome" that houses a diaphragm, not realizing it as an electronic device. I think 426Hemi is on the right track! Thanks, good post.
#9
Melting Slicks
Very interesting posts. The complexity of the sender probably explains its unreliability - it is in a high temperature, high vibration region and circuit boards are probably not that reliable in such a situation.
Is there anywhere else on the engine that one can tap into the oil pressure?
Is there anywhere else on the engine that one can tap into the oil pressure?
$35 - $40 for a sensor like this is dirt cheap. I really wish someone could figure out what causes these puppies to leak.
Charlie
#10
Safety Car
Member Since: Jan 2004
Location: North of Atlanta GA
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St. Jude Donor '05
Getting ta ta ta tired of pulling the intake to change the oil pressure sending unit----on a weekly basis. Yes, I'm torquing it properly.
Until such a time that GM, Standard, BorgWarner, Niehoff, Wells, or whoever else sells these things (all evidently made at the same manufacturer in Mexico), I'm going to do this.
Basically I'm going to relocate the sensor up top next to the left hand fuel rail-----a section of manual oil pressure gauge hose plumbed in to get there. You can buy this hose and fittings as a kit. Each end of the plastic hose has compression fittings ending up with 1/8th inch pipe thread ends.
I took one of the old sensors, drilled the center out and tapped it to 1/8th inch NPT. Then screwed in the hose's fitting. Very easy---looks good:
BTW did you ever see how frigging COMPLEX GM made this sensor? Inside there is a host of surface mount resistors, capacitors, and even an IC! Come on!
OK, ok the engine side is taken care of. Now for the sensor itself. I started out with a round chunk of billet. Hexed off the outside. Drilled one end and tapped it to the sensor's size---M16 X 1.5. Ok I cheated---I used a 5/8 -18 NF which is real close----and so is a 3/8 -18 NPT. And of course on the other end I tapped it to 1/8th inch NPT. Here's a pic of it---you'll also see it in the first picture also with the hose fitting installed. You'll see the plastic pressure hose looping down and around---leading to the back of the block.
And here is a shot of it in place. The connector reaches fine. I plan on securing it to the fuel rail and/or bracket.
Now if I had access to a CNC I'd probably make up a bunch of these----but my lathe is one step up from a wood working unit and my mill isn't much better. Took me half a day. Just how did we churn out thousands of P-38's back in the day before CNC---or even digital readouts??
Anyway I think there is a solution to making the adapter. And that would be the oil pressure sender from a 99 and newer Park Avenue. Looks to be the same unit with the same connector-----only it has what appears to be a 1/4th inch NPT end. In that case all you would need would be a double female to plumb to the oil line. I was just too cheap to order one of these sending units to find out.
Anyway this is my story and I'm sticking to it!
Until such a time that GM, Standard, BorgWarner, Niehoff, Wells, or whoever else sells these things (all evidently made at the same manufacturer in Mexico), I'm going to do this.
Basically I'm going to relocate the sensor up top next to the left hand fuel rail-----a section of manual oil pressure gauge hose plumbed in to get there. You can buy this hose and fittings as a kit. Each end of the plastic hose has compression fittings ending up with 1/8th inch pipe thread ends.
I took one of the old sensors, drilled the center out and tapped it to 1/8th inch NPT. Then screwed in the hose's fitting. Very easy---looks good:
BTW did you ever see how frigging COMPLEX GM made this sensor? Inside there is a host of surface mount resistors, capacitors, and even an IC! Come on!
OK, ok the engine side is taken care of. Now for the sensor itself. I started out with a round chunk of billet. Hexed off the outside. Drilled one end and tapped it to the sensor's size---M16 X 1.5. Ok I cheated---I used a 5/8 -18 NF which is real close----and so is a 3/8 -18 NPT. And of course on the other end I tapped it to 1/8th inch NPT. Here's a pic of it---you'll also see it in the first picture also with the hose fitting installed. You'll see the plastic pressure hose looping down and around---leading to the back of the block.
And here is a shot of it in place. The connector reaches fine. I plan on securing it to the fuel rail and/or bracket.
Now if I had access to a CNC I'd probably make up a bunch of these----but my lathe is one step up from a wood working unit and my mill isn't much better. Took me half a day. Just how did we churn out thousands of P-38's back in the day before CNC---or even digital readouts??
Anyway I think there is a solution to making the adapter. And that would be the oil pressure sender from a 99 and newer Park Avenue. Looks to be the same unit with the same connector-----only it has what appears to be a 1/4th inch NPT end. In that case all you would need would be a double female to plumb to the oil line. I was just too cheap to order one of these sending units to find out.
Anyway this is my story and I'm sticking to it!
#11
Burning Brakes
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#12
Safety Car
Thread Starter
All that I ask in return for using this idea is to refer to it as the "426 Hemi Mod".
#13
Race Director
Actually the patent opportunity is gone unless a provisional patent filing was made before the posting ( which is a public disclosure) Once an idea has been publically disclosed it can no longer be patented..
Great idea.
Great idea.
#14
Team Owner
Very nice! If you can make some I will send the money as soon as possible!
Good write up! You the man!
Forunately I have not had to change mine yet.
Thanks,Matt
Good write up! You the man!
Forunately I have not had to change mine yet.
Thanks,Matt
#15
Melting Slicks
In most other countries, the above is true. In the U.S., there is a one year grace period for filing from date of first public disclosure. I STRONGLY suggest that Hemi 426 act now to copyright the design and look at filing because this is sure to be a product that can be sold. Maybe not in the millions, but I suspect there are enough LS1 wrenchers out there to sell several thousand of them if the cost is reasonable. This thing will sell because you gotta KNOW GM isn't going to upgrade the failure propensity of the sensor.
I don't have a contact inside GM engineering and design any more. If anyone reading this does, or has a contact in another department that would be knowledgable, would you contact that person and see if they know anything about why these things fail?
Charlie
#16
Safety Car
Thread Starter
Man we really need to check out the 99 and newer Park Avenue theory----because if that sensor is the same internally and if there is a pipe thread on fitting on it -------you could do this mod without having to make the billet adapter.
Anyone with access to a couple fittings and a tap could perform the mod. All available at any local Napa, Pep Boys, or whatever auto parts store.
Anyone with access to a couple fittings and a tap could perform the mod. All available at any local Napa, Pep Boys, or whatever auto parts store.
#17
Sorry Charlie, didn't see your post above, before I posted my response. Glad I was right
#18
Safety Car
Thread Starter
New intake gaskets in this morning---just got her back together.
And........the remote mod (426 Hemi Mod ) works like a champ!!! No leaks. Gauge works. Gonorrhea has cleared up.
Also it's cool to watch the oil flow through the tube. Flashback to my LavaLamp days.
Oh yeah, I also made a nice little clamp to hold the sender in place.
OK, now who's the guy who is going to order a ParkAvenue sender to see if that will work?
And........the remote mod (426 Hemi Mod ) works like a champ!!! No leaks. Gauge works. Gonorrhea has cleared up.
Also it's cool to watch the oil flow through the tube. Flashback to my LavaLamp days.
Oh yeah, I also made a nice little clamp to hold the sender in place.
OK, now who's the guy who is going to order a ParkAvenue sender to see if that will work?
#19
Melting Slicks
Member Since: Jun 2001
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St. Jude Donor '06-'07
New intake gaskets in this morning---just got her back together.
And........the remote mod (426 Hemi Mod ) works like a champ!!! No leaks. Gauge works. Gonorrhea has cleared up.
Also it's cool to watch the oil flow through the tube. Flashback to my LavaLamp days.
Oh yeah, I also made a nice little clamp to hold the sender in place.
OK, now who's the guy who is going to order a ParkAvenue sender to see if that will work?
And........the remote mod (426 Hemi Mod ) works like a champ!!! No leaks. Gauge works. Gonorrhea has cleared up.
Also it's cool to watch the oil flow through the tube. Flashback to my LavaLamp days.
Oh yeah, I also made a nice little clamp to hold the sender in place.
OK, now who's the guy who is going to order a ParkAvenue sender to see if that will work?
My hat is off to you What a fantastic idea...
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vet3 (08-08-2017)
#20
Melting Slicks
Great Idea!! Another idea instead of the plastic tubing would be a hardline. I would be worried abot the plastic melting and spewing oil everywhere. I know these lines are used in other sutuations but I just rather be safe than sorry!! Also, I do believe these fail becasue of heat and vibration, if the unit could be remoe mounted to the firewall thee would be a huge decrease in heat and vibration, just a thought!! Once again, great idea!! Dan