Offroad-Express

Just wondering where the pressure gauge would normally sit at idle when the vehicle is warm? and how high it should go under load? Im just worried that my new engine is a tad low on pressure.

Thanks

Should be upper middle 1/3 ... if its the same as my prado gauge

and you trust your oil pressure guage bill ... best thing to do if you suspect LOW OIL PRESSURE IS FIND THE FACTORY SPEC.. AND FIT A MANUAL PRESSURE GUAGE AND CHECK IT THIS WAY FIRST .. ( SORRY BILL THIS IS NOT A DIG )

Thats ok, I think we should fit a secondary gauge on this replacement motor...

already have one just need to get an engine to fit it to

ok back to the topic //////////// 1KZ-TE OIL PRESSURE IS AT IDLE 29 K.P.A THIS IS THE MINIMUM ALLOWABLE TOLERANCE FOR THIS ENGINE

Thanks for this Pinky, so 4 psi minimum.

Just to hijack this.
Does anyone know if the oil pressure gauges on the early 90's Prados with the 1KZ-TE engines have damped/false readings like the temp gauges do?

Also

What does the oil light tell you? Is this a low level alarm?

Sometimes on level going and often on steepish downhill-going, my oil light comes on. When I look at the oil pressure gauge the needle is still where it should be, in the middle third. Checking the oil level on the dipstick it is still near the top mark.

Perhaps I need to get two aftermarket gauges; water temp and oil pressure.
Cheers John

The 1kz motors have a oil sender fitted on the rear of the sump. This only records the level of oil in the sump. Because its at the rear, as you go downhill you get a low reading , and the oil warning light comes on

Thanks OB
But why does it sometimes happen when under constant speed on a flat road??

So again - Does anyone know if the oil pressure gauges on the early 90's Prados with the 1KZ-TE engines have damped/false readings like the temp gauges do?

Cheers Johnno

Yes they do.

When you fit a mechanical aftermarket gauge you will soon see what i mean. The gauge should move in a similar way to the tachometer, as the rev's increase so does the oil pressure corrospondingly.

The sender is positioned almost at the hi oil level, if your oil level is full to the full mark, do's the light still come on?

Yes it does. It only happens occasionally though.
I initially noticed the on flat road happenings when I got home in Sept. At that point the engine had actually been overfilled by an overzealous bro in law when I was down on the Ice over winter.

Truck is now due for another oil & filter change and with the truck stopped overnite the oil is now right at the top mark. And yes it still occasionally does the oil light thing!
Cheers Johnno

My brothers Prado does/did the same thing.
We put a manual pressure gauge in and dissconnected the light at the sender.
Problem solved.

His would do it while idleing, on steep decents and randomly cruising down the road. Was a bit worrying untill we realised it wasn't a pressure light but a level warning light.

I imagine the sender/sensor is very gummed up and a replacement would fix the problem, but whats the point?? You always check the oil before a long trip and weekly around town so its not neccessary in my veiw.

DB where did you connect into the oil supply?
and where on the dash and how did you mount the gauge?

We used a "T' piece into the block were the origional pressure sender unit goes, which is near the oil filter, and then plumbed both the origional gauge and the new one into the "T" piece.

The gauge, well you choose, his Prado has the rounded dash so we just used the baking plate the gauge came with and screwed it to the steel section of the dash and wired the light for the gauge into the light circut on the cig lighter.

wjw wrote:Should be upper middle 1/3 ... if its the same as my prado gauge

Sorry, do you mean upper-middle of the first third of the gauge

or

the top end of the middle section of the gauge?

Where approx on the std gauge is 29kpa?

thanks for your help guys

Todd