Got the engine going today, but oil pressure was maxed off the dial, came back to "high" when warm (top of the "normal" scale on the gauge)
I have a standard UC Torana tacko dash with standard (can type) oil pressure gauge sender ,just wondered if anyone knows what the actual lbs/psi oil pressure should be at the "high" mark on the gauge?
I think all the oil senders for gauges are the same ? also would like to know if different models came with different senders (not including oil light only dash of course)
Thanks
MT
Oil gauge sender's ?
Started by
_mumstaxi_
, Sep 27 2008 09:02 PM
10 replies to this topic
#2
rodomo
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Posted 27 September 2008 - 11:50 PM
So this means you've fitted the UC sender to the Nissan motor? 
#3
_mumstaxi_
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Posted 28 September 2008 - 04:53 AM
So this means you've fitted the UC sender to the Nissan motor?
I am led to belive they are the same sender unit, i was told ( by my mate who works at Holden Parts ) that VL turbo oil sender is "exactly" same part number as the only one (sender part No) available for all the early sixes oil sender's (UC included) ,looks exactly the same as what i had on the 186,and it does work, just noticed the gauge reading high compared to my old set-up.
RB may just have heaps more pressure, but the main reason i ask is that i may have a other issue with the gauge, as when testing electrics i did once have the ignition on without the oil sender connected for about 2 min before i realised the oil gauge was maxed out, this may have damaged the bi-metallic strip etc in the gauge itself ?
Id just thought id ask if early six oil gauges had different sender's incase my mate "is" wrong and i should just look at the sender end first.
MT
#4
_torbirdie_
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Posted 28 September 2008 - 06:01 AM
Yes, according to the vdo catalogue your mate may be correct, you can get the catalogue online. The same sensor is used for all later commodores, however, there is no listing for the VL on the catalogue I have! Whether the used the same sensor as Nissan dont know.I am led to belive they are the same sender unit, i was told ( by my mate who works at Holden Parts ) that VL turbo oil sender is "exactly" same part number as the only one (sender part No) available for all the early sixes oil sender's (UC included) ,looks exactly the same as what i had on the 186,and it does work, just noticed the gauge reading high compared to my old set-up.
RB may just have heaps more pressure, but the main reason i ask is that i may have a other issue with the gauge, as when testing electrics i did once have the ignition on without the oil sender connected for about 2 min before i realised the oil gauge was maxed out, this may have damaged the bi-metallic strip etc in the gauge itself ?
Id just thought id ask if early six oil gauges had different sender's incase my mate "is" wrong and i should just look at the sender end first.
MT
The sender is rated at 0 -180 Ohms for low-high pressure. It doesnt list the ohms rating for mid scale. This is different to LX and LH
On a red six, max oil pressure is possibly 50-60psi and this should be at about 1 oclock on the uc gauge.
I dont know what the max pressure is for a nissan motor, perhaps you need to find that out for comparison.
The correct sensor is listed as having a range of 0-500kPa, 0-72psi. So full scale is perhaps 72psi.
You can test if you have damaged your gauge by applying dummy loads from 10-180Ohms and seeing if they are on the gauge.
Edited by torbirdie, 28 September 2008 - 06:15 AM.
#5
_torbirdie_
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Posted 28 September 2008 - 06:19 AM
Timed out with edit ^.
The catalogue has conflicting info, one page says the specs for the gauge for vl is the same as vb etc. Yet there is no part no listed for oil pressure gauge for the vl in the listings.
The catalogue has conflicting info, one page says the specs for the gauge for vl is the same as vb etc. Yet there is no part no listed for oil pressure gauge for the vl in the listings.
#6
TerrA LX
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Posted 28 September 2008 - 07:53 AM
Maybe connect a proper mechanical gauge to get an accurate reading first.
#7
_mumstaxi_
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Posted 28 September 2008 - 11:07 AM
Yes, according to the vdo catalogue your mate may be correct, you can get the catalogue online. The same sensor is used for all later commodores, however, there is no listing for the VL on the catalogue I have! Whether the used the same sensor as Nissan dont know.
The sender is rated at 0 -180 Ohms for low-high pressure. It doesnt list the ohms rating for mid scale. This is different to LX and LH
On a red six, max oil pressure is possibly 50-60psi and this should be at about 1 oclock on the uc gauge.
I dont know what the max pressure is for a nissan motor, perhaps you need to find that out for comparison.
The correct sensor is listed as having a range of 0-500kPa, 0-72psi. So full scale is perhaps 72psi.
You can test if you have damaged your gauge by applying dummy loads from 10-180Ohms and seeing if they are on the gauge.
Thats just the sort of info that will help me.
Thanks, torbirdie.
MT
#8
rodomo
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Posted 28 September 2008 - 11:22 AM
I wonder if the confusion for VL stems from VL also having a V8?
#9
_torbirdie_
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Posted 28 September 2008 - 12:55 PM
Maybe ^, the vn still uses the same sensor for both v8 and v6. The catalogue only lists the 6cyl vl but doesnt include the oil pressure sender
Edited by torbirdie, 28 September 2008 - 12:56 PM.
#10
Dangerous
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Posted 28 October 2008 - 05:19 PM
I am led to belive they are the same sender unit, i was told ( by my mate who works at Holden Parts ) that VL turbo oil sender is "exactly" same part number as the only one (sender part No) available for all the early sixes oil sender's (UC included) ,looks exactly the same as what i had on the 186,and it does work, just noticed the gauge reading high compared to my old set-up.
RB may just have heaps more pressure, but the main reason i ask is that i may have a other issue with the gauge, as when testing electrics i did once have the ignition on without the oil sender connected for about 2 min before i realised the oil gauge was maxed out, this may have damaged the bi-metallic strip etc in the gauge itself ?
Id just thought id ask if early six oil gauges had different sender's incase my mate "is" wrong and i should just look at the sender end first.
MT
Your mate is incorrect. The LC/LJ 6 cyl oil pressure sender units (and HK through to HQ) work in reverse when compared to the LH/LX/UC one (same for 4, 6 and 8). The oil gauges in these cars are a damped magnetic gauge, where they require an increasing resistance (10 ohms up to around 200 ohms) with increasing oil pressure. The LH and LX are a thermal bimetallic strip gauge, and need a decreasing resistance for increasing pressure, starting at around 70 ohms, and dropping to around 10 ohms for full pressure on the gauge. If you put an LX one in an LC, it will work backwards, and vice versa.
Not sure what the UC one is from personal experience, but if Torbirdie says it's 10 ohms to 180 ohms, I'd believe him. It would kind of make sense, as the subsequent Commodore ones used the same range.
#11
Dr Terry
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Posted 31 October 2008 - 07:51 AM
Hi Guys
The oil pressure sender resistance for UC & all Commodores is the same 10 ohms (low) to 180 ohms (high). The reason that the VL RB30-E engine uses a different sender is the thread is different. All Holden engines are NPT, Nissan in BSP.
If you want to check the gauge, go to Jaycar (or Dick Smith etc.) & get a little resistor around 110 ohms (anywhere from 100 to 115 will be OK). Just put the resistor in place of the oil sender & start the engine. Once it has settled down it should read about half scale. If it doesn't read half scale, repair or replace the gauge.
Dr Terry.
The oil pressure sender resistance for UC & all Commodores is the same 10 ohms (low) to 180 ohms (high). The reason that the VL RB30-E engine uses a different sender is the thread is different. All Holden engines are NPT, Nissan in BSP.
If you want to check the gauge, go to Jaycar (or Dick Smith etc.) & get a little resistor around 110 ohms (anywhere from 100 to 115 will be OK). Just put the resistor in place of the oil sender & start the engine. Once it has settled down it should read about half scale. If it doesn't read half scale, repair or replace the gauge.
Dr Terry.
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