Member Since: 27 Apr 2015
Location: Philadelphia
Posts: 36
Oil Pressure light came on today
Started up (4.4V8, '05 with 111K) just fine but almost immediately the oil pressure light came on.
Car was running fine, no other warning lights, even scanned over OBDII, nothing. Checked oil (was a very little bit low, topped it off) light went away. Any ideas? I heard something about these having an oil sender issue, hopefully its the easily replaced ~$8 part and not an actual oil pump issue.
26th Jun 2015 3:00 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
It's worth getting a real oil pressure gauge screwed in just to see what is going on. The oil pressure switch only activates at a scarily low pressure, so it is possible to have lower than normal pressure without the light coming on (daft, I know).
The oil pump does not produce the pressure, only the flow. The engine itself provides the oil passage restrictions (between bearings, journals etc) that actually produce the oil pressure that you measure.
If you don't have the correct oil pressure range handy I will dig it out for you.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 27 Apr 2015
Location: Philadelphia
Posts: 36
Thanks, its going in on Monday for a thermostat housing replacement anyway, I'll have them check the oil pressure too.
26th Jun 2015 3:40 pm
Sloss
Member Since: 18 Aug 2013
Location: Aberdeenish
Posts: 1691
I wouldn't be using it until you know the outcome of a real pressure check.Stew,
2010 D4 gone but I really loved it
Went back to Merc - C350 AMG
26th Jun 2015 3:46 pm
Nodge68
Member Since: 05 Sep 2014
Location: Newquay
Posts: 1014
Don't run the engine with the low pressure light on. It's going to make things worse if there's a genuine fault. I don't know if the V8 used in the Discovery suffers from the same big end spinning problem some V6 Jaguar engines suffer.
Is there a knock from the engine to accompany the low oil pressure?Freelander SE 2005 Auto.
D3 TDV6. Gone.
26th Jun 2015 6:50 pm
hillstrubl
Member Since: 27 Apr 2015
Location: Philadelphia
Posts: 36
No knock, engine started, runs and sounds fine. No "Actual" faults when scanning OBDII either. I added ~1/4 bottle of oil and the light went away upon restart.
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