Oil light on dash...

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Gavla
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Post Thu Aug 08, 2019 1:36 pm

My oil light on my dash board has started coming on once I have been driving for more than 20 minutes...

Full service with fluid changes in March this year...

What should I be looking out for?

Thanks
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BenHar
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Post Thu Aug 08, 2019 7:18 pm

First thing is to check the oil level.

Ben
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steve_k
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Post Thu Aug 08, 2019 7:41 pm

first things first, what engine???
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
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arrisbmw
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Post Thu Aug 08, 2019 10:55 pm

yes as above oil level, but i,d say dont drive the car untill sorted.
could be as simply as a faulty sender unit.
blocked oil filter .
blocked engine oil ways .
faulty oil pump , not likely
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tha881
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Post Fri Aug 09, 2019 9:30 am

Im pretty certain the light on the dash relates to oil pressure rather than level
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steve_k
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Post Fri Aug 09, 2019 9:33 am

tha881 wrote: ↑
Fri Aug 09, 2019 9:30 am
 Im pretty certain the light on the dash relates to oil pressure rather than level
it does,
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
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Gavla
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Post Fri Aug 09, 2019 10:06 am

steve_k wrote: ↑
Thu Aug 08, 2019 7:41 pm
 first things first, what engine???
325i
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Gavla
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Post Fri Aug 09, 2019 10:06 am

tha881 wrote: ↑
Fri Aug 09, 2019 9:30 am
 Im pretty certain the light on the dash relates to oil pressure rather than level
correct, oil level fine
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Gavla
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Post Fri Aug 09, 2019 10:09 am

Ordered a new oil pressure sensor...just in case

Ordered 5w40 Magnatex to do an oil change...just in case

Ordered a crank case breather hose...just in case
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paultv
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Post Fri Aug 09, 2019 10:36 am

I should say the oil will be at running temp after 20 minutes driving- it takes a while to get fully hot - stick some cheap 15-40 in and see if that fixes it (this is the oil BMW originally recommended for a UK climate) - could be a worn pump or simply worn engine... but hopefully it's the sensor!

Paul :-)
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Gavla
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Post Fri Aug 09, 2019 11:20 am

paultv wrote: ↑
Fri Aug 09, 2019 10:36 am
 ...could be a worn pump or simply worn engine...

Paul :-)
Simply worn engine... 8O ... :(

Fingers crossed it is the sensor... :roll:
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BenHar
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Post Fri Aug 09, 2019 2:57 pm

tha881 wrote: ↑
Fri Aug 09, 2019 9:30 am
 Im pretty certain the light on the dash relates to oil pressure rather than level
It does, but if the level is low the oil pressure light will come on.

Ben
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Gavla
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Post Fri Aug 09, 2019 3:16 pm

So I changed the oil pressure sensor and changed the oil and it seems to have done the trick... fingers crossed it is not a temp fix...

Crank case breather hose will be a bonus, current one is brittle so probably needs to be changed anyway.
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Gavla
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Post Fri Aug 09, 2019 3:17 pm

BenHar wrote: ↑
Fri Aug 09, 2019 2:57 pm
It does, but if the level is low the oil pressure light will come on.

Ben
This I did not know, thought only the onboard light would come on...
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sweep
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Post Fri Aug 09, 2019 4:57 pm

Oil pressure switches can leak check under the rubber boot which covers the electrical connector.
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paultv
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Post Fri Aug 09, 2019 7:28 pm

True story - mine was dribbling oil out of the rubber boot on the end of the switch.

Paul :-)
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https://bmwe30cabriolet-wdm.blogspot.com/
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steve_k
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Post Fri Aug 09, 2019 7:30 pm

paultv wrote: ↑
Fri Aug 09, 2019 7:28 pm
 True story - mine was dribbling oil out of the rubber boot on the end of the switch.

Paul :-)
mine did that till i replaced the switch & it's O ring, no more dribbles now.
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
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BenHar
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Post Sat Aug 10, 2019 12:35 pm

Gavla wrote: ↑
Fri Aug 09, 2019 3:17 pm
BenHar wrote: ↑
Fri Aug 09, 2019 2:57 pm
It does, but if the level is low the oil pressure light will come on.

Ben
This I did not know, thought only the onboard light would come on...
If the oil level gets too low the oil pump pick up cannot reach it so there is no oil pumped round so no oil pressure and the low pressure light comes on.

Ben
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martauto
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Post Sat Aug 10, 2019 1:30 pm

Glad you got this one sorted mate, :clap: :clap:

Mart.
Only the E46 cab left now.
Just got too old.
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