Thread: Oil pressure

Hi Lucas,

Your oil pressure switch is up high at the rear drivers side of your engine block. Normally need a torch to see it. That one looks like the one on the side of the oil filter housing.

Cheers,
Brian.

That looks like a temp sender/switch to me.

Pressure senders/switches have a flat bottom with a hole so the pressure can get in and act on a diaphragm.

Temp senders switches normally have a temp/dic coming out of them into the gallery/tank

Flow switch normally has a paddle on them

Old level switches have a float, new ones have like an inner and outer cylinder Type thing,

Speed senders normally have a completely flat bottom and sometimes long outer casing.

That's all I can think of atm.

I'm sure black night or someone on here will be able to tell you exactly what the part number is, location, manufacturer etc.

I have this same problem cant seem to find oil pressure sender switch ,as theirs one for reverse wired to a relay then their another one just on the filter housing doing nothing wire tied up .

Check the globe behind the dash on the perentie, globe still like new like never been used .

i noticed a hex bit coming out of the block plugged up is this the position for the sender as i would like to screw in a manual type oil pressure gouge .

Reverse light work,s OK so must be oil pressure.

Cannot work it out maybe it never had a oil light from day one , the engine runs great but just for piece of mind maybe you guys have the answer .

2 oil pressure switches.

one drives the reverse lights and the other the idiot light.

I found a dodgy electrical connection to my oil sender unit which I soldered. Because the Redarc boost/ EGT gauge fitted had facility for oil pressure I added the oil sender.

I used a a 1/8 NPT m&f extension & brazed a piece on a slight angle to allow both senders to fit then drilled out & tapped 1/8 NPT, this gives me a digital oil pressure reading & the old idiot light.

Only started out brazing the fitting as I could not get a nipple for straight tee but ended up better as a straight tee & nipple would never have fitted.

Hi Chris,
I would like to fit an oil pressure gauge to my Perentie. What gauge did you fit? What pressure range does the Isuzu 3.9 run at? I was thinking of using a VDO 52mm oil pressure gauge. Just not sure which one.
Regards Warrick.

Originally Posted by wpalmo

Hi Chris,
I would like to fit an oil pressure gauge to my Perentie. What gauge did you fit? What pressure range does the Isuzu 3.9 run at? I was thinking of using a VDO 52mm oil pressure gauge. Just not sure which one.
Regards Warrick.

0-100 psi range for the VDO mechanical pressure gauge. Hopefully mine will arrive this week.

Originally Posted by JDNSW

1. The manual I have is a little cryptic, but seems to suggest 99psi at the pump, 64psi at the oil cooler input and 42psi at the oil gallery, so at least these give the sort of range to expect. I talked to an owner with a gauge fitted yesterday who said he had 60psi in all conditions.

2. If you apply pressure to one end of a pipe, and there is nowhere for the oil to go except the sender, in other words, no flow, then the pressure at the sender end of the pipe will be the same as at the engine end. If there is air in the pipe, it will just give a short delay in reaction of the gauge, and this will only be long enough to notice if the pipe is very restricted.

John

0-100 would be the ideal gauge, mine will idle at 80 cold but drops to 72 warm motor when cruising rising when accelerating, never near 100 psi.