oil pressure sensor how to fit and location on rev5 engine

[alan_uk]

tomorrow im planning on fitting my oil pressure sensor to my engine so i can get my gauges wired up

couple of questions

1st this is what ive got



is this correct

1st question were is the oil pressure sensor on the rev 5 engine ?

do i unscrew it from engine fit new sensor in place then attach the sensor for gauge and original sensor in to these ?



please help

[Peter Gidden]

Remove switch from top of N/S of cylinder head.

Screw adaptor on end of hose into head.

Screw switch and sensor into hexagonal adapptor block on other end of hose.

Note: The hexagonal end will have two similar sized threaded holes. One will be NPT for the sensor and the other BSPT for the OEM switch.

[alan_uk]

thanks peter how will i know which is the right 1 to screw each in to will it say ?

[Peter Gidden]

thanks peter how will i know which is the right 1 to screw each in to will it say ?

Returned your call. Left voicemail.

[alan_uk]

thanks peter was having tea sorry didnt hear phone :S

put sensor for gauge in side hole and fit perfect used ptfe tape also

will see if they work tomorrow

just out of curiosity what should oil pressure be ?

[synXero]

Will this adapter also read oil temp...?

[alan_uk]

god knows bud ?

[synXero]

I assume not/it wouldn't be wise given you want sump temp really rather than head temp? Peter's advice would be gold here. I figured I'd run both pressure and temperature from a sandwich plate, but if that isn't the best way I'm open to suggestion.

[4ndee]

Yes it can measure temp too. The only problem I had using this bit of kit was my oe sensor didn't work ss it didn't give it a good enough earth

[Peter Gidden]

Will this adapter also read oil temp...?

Not to any degree of accuracy. To measure temperature, you need oil flow around the sensor. There is no flow around these sensors.

[synXero]

Will this adapter also read oil temp...?

Not to any degree of accuracy. To measure temperature, you need oil flow around the sensor. There is no flow around these sensors.

Okay, thanks. Would you suggest an oil sandwich then, for temp? Or tapping the actual sump? It seems an awful job to tap the sump - not sure I could do that on the driveway - and with a sandwich, I don't see why you'd use one of these... Again, advice very much appreciated.

[Peter Gidden]

Will this adapter also read oil temp...?

Not to any degree of accuracy. To measure temperature, you need oil flow around the sensor. There is no flow around these sensors.

Okay, thanks. Would you suggest an oil sandwich then, for temp? Or tapping the actual sump? It seems an awful job to tap the sump - not sure I could do that on the driveway - and with a sandwich, I don't see why you'd use one of these... Again, advice very much appreciated.

The most permanent, professional way to mount an oil temp sensor is to weld a boss to the sump. And screw the sensor into the boss. However for most this is highly impractical.

IMHO, a sensor in the sump plug is asking for trouble. It has to be disturbed each oil change, and is the lowest point of the car.

Sandwich plates are a good solution. Cheap, easy to fit, and 99% reliable.

[craig]

I wouldn't fit a sensor in the sump plug, sandwich plate is a much better idea

[synXero]

Not to any degree of accuracy. To measure temperature, you need oil flow around the sensor. There is no flow around these sensors.

Okay, thanks. Would you suggest an oil sandwich then, for temp? Or tapping the actual sump? It seems an awful job to tap the sump - not sure I could do that on the driveway - and with a sandwich, I don't see why you'd use one of these... Again, advice very much appreciated.

The most permanent, professional way to mount an oil temp sensor is to weld a boss to the sump. And screw the sensor into the boss. However for most this is highly impractical.

IMHO, a sensor in the sump plug is asking for trouble. It has to be disturbed each oil change, and is the lowest point of the car.

Sandwich plates are a good solution. Cheap, easy to fit, and 99% reliable.

Forgive me for running roundabouts here, but why then would you bother with one of the T-pieces alan has used here, when a sandwich plate would cater for both temp and pressure?

[Peter Gidden]

Maybe he doesn't want a temp. gauge, just pressure?

[alan_uk]

Yea I only want pressure mate and went with peters advice for using this out of ease

[shinny]

This may be slightly off-topic for the OP, but given the conversation diverged, I figured I'd share. On rev3+ oil pans (deffo on the 3s-gte and diagram look identical on 3s-ge) there are three 3/8" BSP threaded plugs. Rather than mucking around with sump plug adaptors or sandwich plates, you can plumb in your oil sensors (both temp and pressure) in there instead:



One 3/8BSP to 1/8NPT per sender plus PTFE tape on fitting will sort you out:
http://www.merlinmotorsport.co.uk/p3275 ... _info.html
(Can't get this forum software to understand that as a full URL - you have to C&P, sorry!)

A very neat solution and directly comparable with sandwich plate readings

[synXero]

That is... Enlightening. I'll have to have a look at mine. That could be the ultimate solution though. Surprising it isn't common practice?



Not my own car. Presumably to do this the engine oil would need to be drained. Also, I wonder about getting the plugs/bolts that are presumably in there just now out, so as to fit the adapter you mentioned? Looks like they wouldn't want to budge!

[shinny]

That is... Enlightening. I'll have to have a look at mine. That could be the ultimate solution though. Surprising it isn't common practice?

It's not a generic solution so it's no surprise it's not common. Almost all vehicles can accept a sandwich plate, T adaptor or sump plug adaptor hence that's what people immediately think about using. Finding a couple of plugs to unscrew is very specific to that engine; even the earlier 3S engines don't have these plugs!

Should be cheaper and more reliable than a sandwich plate or T piece and less hassle than a sump plug adaptor

Presumably to do this the engine oil would need to be drained.

Surprisingly, no. With the engine cold, I had those plugs in and out a couple of times and lost no more than a small dribble of oil.

Also, I wonder about getting the plugs/bolts that are presumably in there just now out, so as to fit the adapter you mentioned? Looks like they wouldn't want to budge!

They were fairly solid on my tubby, but they did shift. They're 5mm hex head IIRC (don't quote me on that!) but an allen key won't remotely cut it. I used a hex head socket coupled to a universal joint and an extender with a torque wrench on the end


BTW, I can't take credit for finding these plugs; I was shown them by djpkins last year. All I've done is figured out their thread and edited a diagram so it's easy to see where they are

[synXero]

The info you've provided is invaluable dude I will see if I can shift them a turn tomorrow, perhaps. If they do move I'll tighten them up again, buy two of the aforementioned adapters, and use those in place of a sandwich plate... After checking that they're even there on my engine of course 99% sure given your checks.

Hopefully no torque wrench needed, we'll see!