Odd oil pressure warning behaviour
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Odd oil pressure warning behaviour
The oil pressure warning light and buzzer are behaving a little unusually on my T25.
Once the engine warms up the oil pressure warning light and buzzer come on if I spend more than a few seconds with the engine revs between 1600 and 2200. The warning buzzer and light will then stop if I increase the revs above 2200 it will stop.
The temperature is fine as are oil levels (and there appear to be no leaks).
I have recently had the sensor replaced as part of replacing the old engine with a reconditioned JX.
Any suggestions for what might be going on welcomed.
Thanks
Once the engine warms up the oil pressure warning light and buzzer come on if I spend more than a few seconds with the engine revs between 1600 and 2200. The warning buzzer and light will then stop if I increase the revs above 2200 it will stop.
The temperature is fine as are oil levels (and there appear to be no leaks).
I have recently had the sensor replaced as part of replacing the old engine with a reconditioned JX.
Any suggestions for what might be going on welcomed.
Thanks
- bigherb
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- Joined: 27 Mar 2008, 13:50
- 80-90 Mem No: 5789
- Location: West Kent
Re: Odd oil pressure warning behaviour
Best to get the actual oil pressure checked first.
1982 Camper 1970 1500 Beetle Various Skoda's, Ariel Arrow
Re: Odd oil pressure warning behaviour
Some suggestions.
Engine may be rubbish. Hopefully not!
Incorrect grade of oil.(15w40 is what it should be)
High oil pressure switch(by oil filter) may be poor quality /inaccurate.
High pressure switch may be wrong rating.( should be the grey one) to be sure it needs to be removed to see the markings on the back which I believe should be .9 - 1.05 bar)
Hope that helps.
Higher revs enable the oil pump to satisfy the low oil pressure light/buzzer, it’s at low revs where low oil pressure usually show up first.
Engine may be rubbish. Hopefully not!
Incorrect grade of oil.(15w40 is what it should be)
High oil pressure switch(by oil filter) may be poor quality /inaccurate.
High pressure switch may be wrong rating.( should be the grey one) to be sure it needs to be removed to see the markings on the back which I believe should be .9 - 1.05 bar)
Hope that helps.
Higher revs enable the oil pump to satisfy the low oil pressure light/buzzer, it’s at low revs where low oil pressure usually show up first.
- Ian Hulley
- Registered user
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- Joined: 11 Oct 2005, 08:08
- 80-90 Mem No: 1323
- Location: Wirksworth, Derbyshire ... or at t'mill
Re: Odd oil pressure warning behaviour
Cecil wrote:Some suggestions.
Engine may be rubbish. Hopefully not!
Incorrect grade of oil.(15w40 is what it should be)
High oil pressure switch(by oil filter) may be poor quality /inaccurate.
High pressure switch may be wrong rating.( should be the grey one) to be sure it needs to be removed to see the markings on the back which I believe should be .9 - 1.05 bar)
Hope that helps.
Higher revs enable the oil pump to satisfy the low oil pressure light/buzzer, it’s at low revs where low oil pressure usually show up first.
Be careful, we're talking a JX oil-burner here, not a wbxer
Ian
The Hulley's Bus
1989 2.1DJ Trampspotter
LPG courtesy of Steve @ Gasure
1989 2.1DJ Trampspotter
LPG courtesy of Steve @ Gasure
Re: Odd oil pressure warning behaviour
Yes I saw that it is a jx,that’s the engine I know/have. Have I said anything missleading or wrong?Ian Hulley wrote:Cecil wrote:Some suggestions.
Engine may be rubbish. Hopefully not!
Incorrect grade of oil.(15w40 is what it should be)
High oil pressure switch(by oil filter) may be poor quality /inaccurate.
High pressure switch may be wrong rating.( should be the grey one) to be sure it needs to be removed to see the markings on the back which I believe should be .9 - 1.05 bar)
Hope that helps.
Higher revs enable the oil pump to satisfy the low oil pressure light/buzzer, it’s at low revs where low oil pressure usually show up first.
Be careful, we're talking a JX oil-burner here, not a wbxer
Ian
- 937carrera
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- 80-90 Mem No: 16333
- Location: N Yorks.
Re: Odd oil pressure warning behaviour
Sounds to me like the DOPS system is working correctly and warning you that oil pressure is low just around the activation point of 2000 rpm. Then when the revs go above 2200 the additional flow improves the pressure beyond the high switch activation point
https://www.brickwerks.co.uk/brickwerks ... -switches/
You need to identify if it's a real warning or a sender problem, two things to do
1. Have a look at the colour code for the high sender. If it's now black (1.4 bar), maybe you had a grey (0.9 bar) one before and you are getting a warning that you weren't getting before . Easy visual check.
2. Get the oil pressure checked, ideally with an oil temp being measured as well, see what pressure you are getting at idle, 2000 rpm and 2500 rpm when the oil is at 80+ degrees C. You will need he equipment or get your garage to check for you.
https://www.brickwerks.co.uk/brickwerks ... -switches/
You need to identify if it's a real warning or a sender problem, two things to do
1. Have a look at the colour code for the high sender. If it's now black (1.4 bar), maybe you had a grey (0.9 bar) one before and you are getting a warning that you weren't getting before . Easy visual check.
2. Get the oil pressure checked, ideally with an oil temp being measured as well, see what pressure you are getting at idle, 2000 rpm and 2500 rpm when the oil is at 80+ degrees C. You will need he equipment or get your garage to check for you.
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
Re: Odd oil pressure warning behaviour
Brickwerks say later jx engine has .9 or 1.4 bar high pressure switch so your newly reconditioned engine should be able to also satisfy the 1.4 bar switch I would think.
Re: Odd oil pressure warning behaviour
depends who reconditioned it
____________________________________________
84 CaravelleGL 1.9 DG WBX Bronze Beige Metallic auto
84 CaravelleGL 1.9 DG WBX Bronze Beige Metallic auto
Re: Odd oil pressure warning behaviour
Also dependant on the switch being a good one.
- 937carrera
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- Joined: 05 Apr 2015, 19:29
- 80-90 Mem No: 16333
- Location: N Yorks.
Re: Odd oil pressure warning behaviour
Which is why you need to get the pressure checked
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
Re: Odd oil pressure warning behaviour
Thanks for all your helpful replies