orange lights

Post by **juliebreed** » Fri Oct 24, 2008 2:07 pm

i am an idiot i\'m sure , but wot is are the 2 orange lights either side of the speedo , i hav the right one goin on intermittently????

Post by **Dru** » Fri Oct 24, 2008 2:26 pm

From my reading of it, one is the oil pressure light and the other a differential oil pressure warning, which tells you when the oil filter is clogged. Does the left one come on when you switch on the ignition and then go off after the engine is started? -which is how the oil pressure light behaves when things are working as they should...

Post by **mike.perry** » Fri Oct 24, 2008 4:09 pm

The one on the right is the low oil pressure light which should go out as soon as the engine is running. If it flickers at tickover then increase the tickover speed slightly. It is generally an indication of a worn engine. It should operate below 8psi.
The one on the left is the oil filter blocked warning light. I have never seen one lit so I guess it only works when the filter hasn't been changed for 20000 miles. Most filters haven't got a warning light anyway.

Post by **bigginger** » Fri Oct 24, 2008 10:12 pm

Dru wrote: the other a differential oil pressure warning

Nope, engine oil filter blocked warning, as has just been said - just wanted to make it clear

Post by **PSL184** » Fri Oct 24, 2008 11:02 pm

bigginger wrote:
Dru wrote: the other a differential oil pressure warning
Nope, engine oil filter blocked warning, as has just been said - just wanted to make it clear

Same thing, isn't it..... I don't think Dru meant the "diff" oil pressure but a "difference" in pressure across the inlet and outlet of the filter.... ?

Post by **d_harris** » Fri Oct 24, 2008 11:31 pm

Thats how I read it!! I have the sender for it on my loom but nothing to plug it into

Post by **Dru** » Sat Oct 25, 2008 6:41 am

Yes, that is indeed what I meant; the difference between pressures before and after the filter. Can't be too careful with words, of course.

...ironically, I was draining the diff oil only yesterday too.

Post by **rayofleamington** » Sat Oct 25, 2008 10:27 am

The one on the left is the oil filter blocked warning light. I have never seen one lit so I guess it only works when the filter hasn't been changed for 20000 miles. Most filters haven't got a warning light anyway.

I' had a MG 1275 engine fail due to lack of a filter blocked sensor. Filter was changed when the engine was fitted 2 weeks earlier.

Post by **bmcecosse** » Sat Oct 25, 2008 11:56 am

I don't know any other car (maybe A40?) which has this differential pressure oil filter blocked warning light! Dru is correct - it does measure the differential pressure across the filter element. Of course - since lots of cars have lost the plate and/or spring under the filter element, there is no chance of the filter blocking anyway!