Oil Pressure Warning not Working

[Llamapup]

Hello All

I have a 1990 t25 1.6TD Westy.

I've just had a new engine fitted (at great cost) only to realise my oil pressure warning light is not working. I've chased all the earths and connections and can only assume that its the Printed Circuit Board. I can't seem to find anywhere that sells them, so I'm hoping I can just replace the entire set of guages.

I found this on ebay.

http://cgi.ebay.co.uk/VW-INSTRUMENT-DAS ... 7C294%3A50

Is this what I need to fix my problem? Is it just a straight swap?


Thanks

[toomanytoys]

Fitted a new switch???

Would be a little strange that something that was working now isnt when it hasnt been disturbed...

Have you checked the switch is earthed when engine off and open circuit when engine running??

[andisnewsyncro]

Hi
on the plus point, glad you got your engine in and running. With regards to not working, do you mean the bulb /led not coming on at all or the low pressure sensors etc.
BUT
Surely this question should be addressed to the garage who fitted it for you, I would be asking them why, after spending out a huge amount of cash for a transplant, they haven't made sure it's all ok? I appreciate that it is possible for the PCB to have stopped working since the transplant, but can they confirm that the warning system was functioning when it left them? I would be looking for a missed connection at the engine end first, seeing as that's the bit that's been disturbed recently.
Or is it possible that the system was not working originally and that's how your old engine got cooked in the first place? If I remember rightly though the garage who have done the trnsplant are a long way from you...

I'm guessing that by now you're safely back home, have you found a proper local garage who can have a look at it for you? Now you've bitten the bullet and spent the cash on the engine, you need somebody to keep it as good as it is now. Brickwerks are busy, as always, but it could be worth booking it in there for a final check over, it'll need a couple of services pretty soon any way to kep your warranty valid. Give Mr Baxter a call and se if he can fit you in, it's not far away.

Good luck
Andi

[andisnewsyncro]

Or book toomanytoys to come and have a look

[Llamapup]

Hi

Or is it possible that the system was not working originally and that's how your old engine got cooked in the first place? If I remember rightly though the garage who have done the trnsplant are a long way from you...

I'm guessing that by now you're safely back home, have you found a proper local garage who can have a look at it for you? Now you've bitten the bullet and spent the cash on the engine, you need somebody to keep it as good as it is now. Brickwerks are busy, as always, but it could be worth booking it in there for a final check over, it'll need a couple of services pretty soon any way to kep your warranty valid. Give Mr Baxter a call and se if he can fit you in, it's not far away.

Good luck
Andi

Thanks for your prompt reply Andy (and others).

The PCB was not working properly when the engine blew. The guages The dash guages have been a bit suspicious for a while now. I get intermitant temp warning light when the engine is stone cold for example. I think the PCB was a bit ropey when I got the van in Dec 08. This may have contributed to my engine demise, but I was getting alot of oil smoke on start up and some pretty rought running over the past 2000 miles. It started using a lot of oil in that time.

Anyway. I'm still waiting to take delivery of the van this afternoon. The garage that is fitting it is waiting for the correct waterpump belt. They did a test run of the engine for a few seconds and can confirm that I am getting oil presssure all over the engine. The took the plugs out to check it was squirting oil out at the top and back of the engine.

So no I haven't made it home yet. I'm not sure I am looking forward to a long drive with a new engine with no working oil pressure guage. I don't think I am left with any other choice however. (slightly worried as to what this will mean for warranty) As the garage has confirmed that I am getting oil pressure, do you think I am okay to drive the van? What do you reckon?

I'll take your advice on Brickwerks.

Thanks

Chris

[andisnewsyncro]

I don't know if the pcb is obsolete from VW now, I got a new one from them a little over 2 years ago and it was about £45 quid. Got to be worth a try, they might get one this afternoon?? Otherwise someone will possibly have one on here.

If the garage are happy that the engine is in and running correctly, then you should be fine on the way home. Just remember the old running in thing; don't over rev it in low gears, don't labour it in high gears & take your time (oh yeah, right !!! )

When you get home you'll be ready for a 1st oil and filter change pretty much I'd have thought. I think I did my first one at about 300 miles (after a drive to St Austell for its first outing) and then again at 1000 mile on the new engine, but check the paperwork and see what they stipulate for your warranty I guess it will be based on a correct maintenance schedule as prescribed by them or indeed VW, but not on how many miles you can drive in one trip.

It shouldn't do any harm doing it's "initial running in" in one trip I wouldn't have thought - like I said I did it with mine & it's still running sweetly after 40,000 km, but see if anyone else advises differently. Back in the day, commercial dealers often used to deliver and swap stock by road all over the country.

[kathyshack]

i might not be totally correct here, but i don't think i have oil pressure warning / buzzer of doom working anymore since the fitting of my reconditioned engine. Think it has something to do with old wiring on the engine and new wiring up front. Can it depend on the reconditioned engine, as to whether you will still have this or not? I might be totally wrong on this though! mine is a 1.9dg though so probably different from yours?

[Simon Baxter]

You don't have any oil warning in yours Kathy, nothing works!

Early engines have a normal, conventional oil warning light, these systems have 1 oil pressure switch (blue) wired to the blue wire.
Later engines have buzzer of doom, they have 2 switches.

[ermie571]

Just out of interest,

I have an early (1984) original dg that presumably had just the conventional one sensor system. It now has a 1990 dj i it - with 2 sensors, but preseume one isn't being used. Can you change the wiring to make use of the buzzer - would I need to change the clocks to later ones to incorporate the buzzer?

Em
x

[AngeloEvs]

The oil pressure light is controlled by the DOPs PCB, you can easily convert to the early system of the switch directly controlling Red LED or alternatively replace the PCB in the speedo. I have removed the DOPs on mine and have a green LED connected to the high pressure switch that tells me more about the state of my oil pressure than the dops (and never goes out except when the rpm drops below 1000 at idle with a hot engine) and the Red LED to the low pressure switch that tells me I'm in trouble if it ever comes on!