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Join Date: May 1999
Location: Alta Loma, CA
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Question Oil pressure sensor & gauge

I would like to add a VDO oil pressure gauge to my center console.
Can anyone provide part numbers for appropriate gauge and sensor for a '73 2.0?

TIA
Matt
Old 08-20-2002, 08:55 PM
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Don't remember the part numbers, but when I fitted this gauge I used a 911 pressure sender (same M10x1.0 thread and is made by VDO)
Trouble is the sender fouls the distributor body so you'll have to find an appropriate oil hose.
VDO make a "T" piece so you can still run the oil pressure switch to operate the light on your dash.
The gauge I used is from a Golf GTI (VDO -measured in BAR) alternative cars would be the 944/924
Cheers

Last edited by thesey914; 08-20-2002 at 11:01 PM..
Old 08-20-2002, 10:56 PM
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I thought I had heard about a pressure sensor / switch that had two terminals; one for the analog signal (sensor), and one for the idiot light (switch).

Also, I thought the stock switch has a 1/8" NPT thread. Can anyone confirm which is correct?

- Matt
Old 08-21-2002, 04:56 AM
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I think if you look right in the Pelican catalog you'll see the dual sender (light/gauge). I have been told it is a 1/8" NPT also, and it's just what it looked like when I changed my sender a few months ago. A straight thread like an M10 x 1.0 would require a shoulder and a washer/gasket/etc. to seal properly, whereas the tapered pipe thread finally gets tight as it goes down into the hole and seals things up.
Old 08-21-2002, 05:37 AM
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Yup to all of the above.

The sender is too large, so get the "adaptor kit" (a bracket, some hose, and an adaptor) or DIY with some grease-gun hose. Make sure to ground the case of the sender...

--DD
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Old 08-21-2002, 07:31 AM
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OK...
Finally found the gauge and sensors in the PP catalog.
Last question: 80 or 150 psi for a stock 2.0L?

- Matt
Old 08-21-2002, 02:37 PM
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80 PSI. A stock Type IV engine shouldn't get that high when the oil is warmed up. Cold oil can, but the 80 PSI gauge is fine for normal running.

--DD
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Old 08-21-2002, 05:22 PM
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Quote:
Originally posted by Will98D
I have been told it is a 1/8" NPT also, and it's just what it looked like when I changed my sender a few months ago. A straight thread like an M10 x 1.0 would require a shoulder and a washer/gasket/etc. to seal properly
The thread is M10x1.0. ( I'm 99% sure -the VDO "T" piece was labelled M10x1.0 on its packaging too) -NPT is American national pipe thread and is imperially measured. The 914 is built in Germany and therefore uses metric threads.
You are right about the straight thread needing a washer to seal it -the sender on the 911 has a crush washer/shoulder.
Cheers
Old 08-21-2002, 10:38 PM
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Now for the funny part--
There is no standard for metric tapered (pipe) thread. So they use US standards instead.

The fitting in the 914 case was originally a metric size (M6??), tapered thread. But that is very close to a US size (if M6 is correct, that's 1/4") that the US size works just fine. More than fine enough, in fact--and most or all of the aftermarket VDO senders you can get are actually the US size!

--DD
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Old 08-22-2002, 07:05 AM
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Dave, well I learn something new everyday......I looked on all my engineering thread charts and no tapered metric threads were listed.
Now I remember, when I screwed the sending units into the VDO "T" piece, they were tapered (they tightened on insertion) but the male end, that screws into the case I'm (98% sure) was a straight thread.....

Not trying to conduct a p*ssing contest, , and if it fits then problem solved
Old 08-22-2002, 09:37 AM
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