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Oil light on when braking!!!

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aog:
Hi All!!

Oil light comes on when I brake, is it terminal????!!!  
I am about to do a oil change with filter, maybe take off the sump and look at the strainer, if I can find anyone with a gasket in stock local to me....

Questions:

1. Can the sump be removed in situ?
2. What would cause this oil light to come on? I have oil in the engine, not full, but not low...
3. If the strainer is ok, would a new oil pump fix this problem??
4. Does it sound like the bottom end is going?? (Hope not!)

When you start the engine, it takes a moment for the light to go out, just maybe a second and a half or so, it doesn't come on at idle - though the idle is a a little high.

Thoughts?
TIA

bezzabsa:
be interested in this as my 88 swb 2.25 diesel does the same...only when cold??

aog:

--- Quote from: "bezzabsa" ---be interested in this as my 88 swb 2.25 diesel does the same...only when cold??
--- End quote ---


Mine when hot. Seems ok when cold, makes me wonder if it's just worn oil pump or engine. I will try some 20/50 "classic" oil and see what happens

hobbit:
One or two things here, on the old mil engines I used to drive, nine times out of ten this meant that the oil level was too low, not being a regular checker of level, this is always a good auto reminder to do so, normally the level is on the low mark by then though.

Oil light on when engine hot on the oil slopping roound when breaking, could be that the oil is warmed up from something like 20/50 thick oil.

If the levels are ok and you still get the light on slopping, it could well mean low oil pressure, 2 main reasons, oil pump worn not enough pressure there, or a worn engine, prob down to general wear and tear over the years, these engines are getting on a bit now

A good accessory in the vehicles is an oil pressure gauge, lot better than an oil light, you can check the pressure remember by the time the oil light is coming on it is fairly low, knocking big ends etc time.

To answer the questions
1. Can the sump be removed in situ?
Yes you can no probs with a standard setup

2. What would cause this oil light to come on? I have oil in the engine, not full, but not low...
Oil light will come on if the level is a bit low as the oil pickup in the sump is quite good at not picking up if the oil is slopping round, try heavier 20/50 type oil, one more thing is does it have the right dipstick, I believe there were two different lengths, but not too sure on that, it may actually be different lengths  of holder rather than the sticks
3. If the strainer is ok, would a new oil pump fix this problem??
The strainer may be partially blocked with muck depending on the use of the engine and frequency of oil changes in its life. You can remove the oil pump and check the clearances inside the pump, this as said above is one of the 3 main reasons
4. Does it sound like the bottom end is going?? (Hope not!)
That is the third one, but maybe not as bad as you think, worn crank shells may be the cause, to be honest if the bottom end is going you will definately hear it banging, I have an engine in one of the vehicles with weak oil pressure, when I start it, you can hear the thing rattle until the oil gets round the engine :lol:

It takes a lot to wreck one of these old engines, (sandy water in the engine is one exception :oops: )

jimthelandyman:
In the original series 3 handbook it states that the oil light may come on when braking, this happened in mine but did it less when i topped it up.

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