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Oil pressure switch


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I'm on my 11th 200 tdi since 1992.  In the previous ten, I have never had to change an oil pressure switch.

My 11th - a 1993 Disco 5 door, I am about to fit my third in 2 years. I'm using Intermotor switches, not Britpart. Every time one fails, I have to double check all is ok, so have the joy (and mess of using a oil pressure test kit. Pressure is fine 50+ psi on cold start tick-over and 38 psi on warm tick-over. Using Shell Rimula 10W40

I've ordered another switch - OE from Bearmach, but am contemplating fitting an electric oil pressure gauge to avoid annoyance in the future

I'm aware that 200tdi owners are now a select few - has anyone else had this problem?

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Intermotor stuff is often actually complete rubbish, in my experience.

...and I used to work in an independent car accessories/parts place.

Take V8 dizzy caps, fail within a few hundred miles.

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Mine still works, and was fitted long before I bought the engine in 2007.  I think it is original to the engine, K registered donor, so probably around 28 years old.  I’d pony up for a Gen Parts sender.

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I replaced mine last year as it was leaking oil. Now the replacement is doing the same.

Time to buy a real one methinks. Anyone got the part number as I'm too lazy to search for it 😆

Mo

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14 minutes ago, Mo Murphy said:

I replaced mine last year as it was leaking oil. Now the replacement is doing the same.

Time to buy a real one methinks. Anyone got the part number as I'm too lazy to search for it 😆

Mo

200Tdi oil pressure switch PRC6387 

so you don't have to strain yourself BUT make sure you are sat down when you see the price----  Genuine LR switch https://www.brit-car.co.uk/product.php/89829/0/oil_pressure_engine_switch___2_25l___2_5l_4_cylinder_petrol___diesel___200___300_tdi___2_5l_vm__defender___range_rover_classic

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That’s not bad - I was expecting it to be over £100 from the build up! 😂. Certainly a lot cheaper than repeated replacements or rebuilding the engine because it didn’t want about low pressure...

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4 hours ago, Snagger said:

That’s not bad - I was expecting it to be over £100 from the build up! 😂. Certainly a lot cheaper than repeated replacements or rebuilding the engine because it didn’t want about low pressure...

This is why I am thinking of going down the oil pressure gauge route - I found a nice LED flat fit unit...

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I put a worry gauge on mine donkeys years ago, against advice of a specialist.  Had good pressure on my 12J, but I’ve never been happy with the readings on my Tdi.  It’s probably harmless and may be an indication error, but it’s going to cost me more money just to get a right reading because of my OCD!

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Just looking at the LED flat Oil Pressure doofah and it also does water temp, boost and EGT

I have a second water temp sender on the lower LHS rad tank

I could do with a BOOST measuring doofah

And an EGT sender is an easy thing to acquire/fit

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@Nonimouse

 

So, oil pressure switch arrived today.

No makers marks on it except for the part no. stamped on one flat of the hex and 41/12 stamped on the opposite flat, though I've no idea what that means !

The white housing with the spade connector above the fitting feels like ceramic rather than plastic, though it may be a hard plastic.

It accompanied by an aluminium sealing washer nattily punched off centre !

Packaging indicates it is Polish made.

Now all I have to do is wait for the lock down to finish so that I can get up the farm and fit it 🤐

HTH

Mo

20200501_142347.jpg

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I had a defect pressure switch on my Moto Guzzi years ago and one on my 200Tdi too. Since I do not really rely to those switches I installed a direct pressure gauge. I drilled a hole in the oil filter carrier and connected a simple manometer (6 bar) as pressure gauge.

31735240nt.jpg.9b8e47d15735cfe7de020a29fafa6090.jpg

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