3.2 swap: oil pressure sender

Shuie · 10-21-2005, 03:50 PM

Im swapping a 3.2 Carrera motor into my '72T. Since I had planned on keeping the stock gauges in my car I ordered a 2.4 oil temperature sender and oil pressure sender to install on the 3.2 motor. The temp sender went on the 3.2 without issue, but the inline block that the pressure sender plugs into is not going to work with the earlier sender.

Does anyone have the part number for the block the 2.4 oil pressure sender threads into?

TIA

tom1394racing · 10-21-2005, 04:51 PM

Sherman

I just went through this with my RSR clone. I swapped a 3.0 SC into a 73 chassis. Like you, I went with the oil pressure sending unit from the original 2.4 motor so I could keep the same gage.

The 2.4 does not use a block type fitting like the later motors. I used the original "banjo style" fitting from the 2.4 motor.

The Porsche PET lists this P/N as 914.355.531.00.

Stoddard usually has this type of unusual part in stock or can order them.

Shuie · 10-21-2005, 04:54 PM

wooohooo

thanks for the assist.

Does it matter if I have the Carrera tensioners? Also, does anyone have the Pelican number for this? I cant find it online.

tom1394racing · 10-21-2005, 06:03 PM

Sherman

Just did a search on the Stoddard Website. They have it in stock.

Call them in the morning and you'll have it Wednesday.

914-355-531-00 Banjo ring, rear caliper, 2 req'd. Fits 356C. $18.47 In Stock

fintstone · fintstone's Garage

Our sponsor has it listed for about the same price. call PP to see if it is in stock. Keep it in the family.

Shuie · 07:40 PM

okay, whats the pelican part number? I cant find it. I find a banjo bolt for a brake caliper. Is it the same part?

Shuie · 10-21-2005, 07:49 PM

What about the piece that goes through the banjo bolt and attaches to the case? Im pretty sure whatever I have right now isnt going to work there.

randywebb · 10-21-2005, 08:33 PM

you can also put it up by the firewall & run the wire to there.

fintstone · fintstone's Garage

Quote:

Originally posted by Shuie
okay, whats the pelican part number? I cant find it. I find a banjo bolt for a brake caliper. Is it the same part?

If you type the part number posted by Tom (914-355-531-00) in the "Search Pelican Parts" box above, it gives this:
Banjo Ring, Rear, 2 required, 356C (1963-65)
B-355-531-00 $18.95

Of course I would call and make sure it was in stock.

tom1394racing · 10-22-2005, 04:00 AM

The fitting for the oil pressure sender is the same fitting used for the the connection from the rubber lines to the calipers. I pulled it off the Porsche PET and when I looked it up on the Stoddard website it was listed as the rear caliper banjo ring. I think it should be front caliper.

It will work with Carrera Tensioners. The 2.4 that I stole mine from had the Carrera tensioners.

The piece that goes through the bolt and attaches to the case is:

p/n 901.107.375.00 for the 2.4 case
p/n 911.107.709.01 for both the 3.0 and 3.2 cases

In my set up I was able to use both the through piece (p/n 901.107.375.00) and the banjo fitting (p/n 914-355-531-00) from the 2.4 case on the 3.0 case to adapt the 2.4 sender to the 3.0 case.
I am not sure which pices you have from your 3.2 case but I have both pieces from my original 3.0 case:

The through piece in the picture does thread into my 2.4 case which leads me to believe that it might work with your 3.2 case. I'll give it to you if you are stuck and would like to try it

Shuie · 06:58 AM

Thanks Tom! Im pretty sure thats what I needed.

Heres the parts list just in case anyone stumbles across this in the future:

A-741-551-01 (OEM: 901-741-551-01) - numbered pressure sender
N-013-808-3 (OEM: 965-013-808-3) - sealing ring for sender
B-355-531-00 (901.107.375.00) - through bolt for banjo fitting
901-107-375-00-OEM (914.355.531.00) - banjo fitting
--------------------------------
total damages: ~$112

Early_S_Man · 10-22-2005, 10:13 PM

Sherman,

If you replace the oil pressure switch on top of the 3.2 engine ... up above engine-mounted oil cooler ... with the 2.4 pressure sender ... you won't need any adapters. Use that oil pressure switch wire in the 3.2 engine harness and move it from the warning lamp over to the gauge input at the 14-pin connector and you should have a working early pressure gauge!

Shuie · 10-22-2005, 10:20 PM

Brilliant! Thanks Warren!

Shuie · 10-28-2005, 05:04 AM

Just an update....

I had already ordered the parts before Warren posted the above solution. Unless Ive been sent the wrong part, 901.107.375.00 is definitely NOT the right through bolt for the banjo fitting. There is no way.

Im going to send the parts back since Warren has posted an excellent solution, but I wanted to post this in case anyone searches for something similar in the future.

tom1394racing · 10-28-2005, 03:10 PM

Shuie

My Porsche PET shows the part number for the through bolt to be:

p/n 911.107.709.01 for both the 3.0 and 3.2 cases
p/n 901.107.375.00 for the 2.4 case

If you ordered p/n 901.107.375.00 for your 3.2 case, it should not fit.

Warren's solution should work just as well. I suppose that you'll have to find something to plug the original case hole for the sensor.

Shuie · 08:52 AM

Im still fighting with this. I think its the damn sender.

The sender below is 901-741-551-01. The part next to it is an adapter for attaching the earlier sender to a later pressure sender block like was on the 3.2. The last part is the banjo bolt that has already been discussed.

This sender will not thread into the adapter, the banjo bolt, or the spot on the case for the pressure switch for more than one rotation before it tightens up and feels like its going to strip out. Is this right? The 101 says to use teflon tape with the tapered thread sender, but this sender feels like it will require enough force to strip its threads out long before its in place.

Ive found old threads here about the pressure senders with the tapered threads. This is also mentioned in the 101. How far should the tapered sender thread into place? Is there anyway to tell a non tapered thread sender from the regular one without a thread pitch gauge? It seems that bothe versions carry the same part number

I need some help on this. This is a non returnable part that Ive already wasted $75 on and no one answering the phones at Pelican has a clue what the solution to my problem is. I'll order another one if I can be sure that I'll get the right one, but Im not convinced that anyone can tell the difference.

randywebb · 01-02-2006, 12:53 PM

They might actually let you return it if you call and describe & note that it was never installed.

On mine, I did the same thing Warren posted about...

I don't know how to tell the ptich, etc. but a single rotation does _not_ sound right. But that looks like the same size as the small tapered one I had. The other one I had was really big.

Here are my old notes on it when I did it [I don't recognize the p/n that you have, BTW]:

for '86:
oil temp 911 606 112 00
oil psi 911 606 135 00
-------------------------------
This is from an old post by Jim Sims (tho I didn't do it that way)...

One can mount the old style oil pressure senders in the fitting block
located in the right cam tower oil line. I have done it. Porsche sells
an adapter bushing (PN 901.101.175.01) that permits the 18 mm x 1.5
fitting block thread to be bushed down to a female 10 mm x 1 that will
permit the male threads on the old style oil pressure sender to be
used. If you elect to do this be sure and also order a new 18 x 24 mm
metal sealing ring (PN 900.123.009.20) to go betwewn the bushing and the block and a new 10 x 16 mm metal sealing ring (PN 900.123.004.20) to go between the bushing and the old style oil sender. The fitting block may have to be tilted rearward to obtain adequate clearance for the sender. Jim Sims

PN for temperature sender for years 1965 through 1976 for use w/numerical gages (those with actual temp. numbers) is 901.641.632.00.
The PN for the 14 x 18mm aluminum sealing ring for the sender is
900.123.007.30.

Oil Pressure Sending Unit
ht=oil+line+an+adapter

Shuie · 01-02-2006, 09:00 PM

Does anyone know if there is any way to tell the difference between the tapered and non tapered thread pressure sender by part number or without buying it and checking with a thread pitch gauge?

Is this the right part?

A-741-551-01 (OEM: 901-741-551-01) - numbered pressure sender

zyron16 · 12-09-2006, 03:17 AM

I bought an VDO Universal Oil Pressure Sender and when I was going to install it in my 1977 Porsche 911 I realize that in order to do that I will need some sort if adapter because the sender has a male 1/8 and the "square" were it's suposed to fit is a female 18". Does any of you guys know if there's some adapter that I can use in order to use that VDO Universal Sender.

Shuie · 12-09-2006, 03:32 AM

Im not sure, but Im glad someone bumped this thread. I'll update it while Im here.

This sender is absolutely the wrong sender for a 3.2 swap into an early car like my '72 that uses the stock '72 gauges. It works, but the pressure readings are totally off for my gauge.

This has been a really frustrating part of this project and I would advise anyone thats doing this swap just to use the correct sender for the motor and find a gauge from the same year car. You wont find anyone on the phone at Pelican or Stoddard or anywhere else that has a clue of what parts you really need to make this work.