Stock 1jz Coolant Temp & Oil Pressure

[Mischief7m]

Hi,

Just wondering what you guys are seeing for coolant temp, I have my temp probe in the upper rad. hose, and in 85 degree weather, it sits steady at about 180 reguardless of speed. when i shut it down it rises to about 195.

just wondering if this sounds like a normal temp range.

also, at idle, my oil pressure sits at about 18psi, and about 40 - 50 psi during normal driving. again, does this sound normal?

i just started daily driving my new 1jz, so i just want to make sure my numbers are normal,

thanks guys,
Trevor

-edit found my answers, mods can close or delete this thread,
thanks

 

[queenskid926]

well what where the answers? if you could post the normal operating temps and oil pressure for the 1jz so everybody else can benefit and when they search find it easier.

 

[Mischief7m]

from what i have found, the numbers i posted above are correct.

 

[queenskid926]

thanks

from what i have found, the numbers i posted above are correct.

 

[SupraClaou]

I have a 2jzgte with stock twins.
I will tell you about my oil pressure which I think is :aigo: to much!!!!
At idle (operating temps) I have 35-40 psi (2.2 - 2.4 kgm) of oil pressure
and at cruising (3k) I got about 80-90 psi (4.8 - 5.4 kgm),and when I do full
throttle I got 120 - 130 psi (7.2 - 8.0)..I peak my stock oil pressure gauge!
I have both 7m oil pressure sensor (new from toyota) and defi oil sensor
on a sandwitch plate before the oil filter.

Is something wrong with my oil pressure???? Everybody say to me that I
have to much oil pressure!

 

[jdub]

What weight oil are you using?

 

[Mischief7m]

when i first start my car (first 30 seconds) it hits 80-90 (autometer mech. gauge) then once the oil becomes a little more viscous, it settles down, and that worried me...but 130? holy s**t

 

[jdub]

once the oil becomes a little more viscous...

You do mean a "little less viscous" as it heats up...right?

If you guys are running a 50W multigrade, it's no wonder you have high pressure. One thing to keep in mind is high pressure does not equal high flow...thick oils do not flow as well as a 30W multigrade. You are not helping the engine...might want to read the link to Dr AE Haas' Motor Oil 101 in my sig.

 

[Mischief7m]

You do mean a "little less viscous" as it heats up...right?

If you guys are running a 50W multigrade, it's no wonder you have high pressure. One thing to keep in mind is high pressure does not equal high flow...thick oils do not flow as well as a 30W multigrade. You are not helping the engine...might want to read the link to Dr AE Haas' Motor Oil 101 in my sig.

right right haha at least i spelled it right, and it being summer, i run mobil 1 10W-30, winter, i switch to 5W.

 

[jdub]

i run mobil 1 10W-30, winter, i switch to 5W.

And with the pressures you show, that's about right

You do know that Mobil 1 is a Grp III hydrocracked dino oil (not a PAO or ester based synthetic)? Might want to take a look in the oil section...personally, I run Castrol European Formula 0W-30 (aka: German Castrol) all year. It's a Grp IV PAO synthetic...superior to both the base stock and additives in Mobil 1, and at the same price or cheaper. If you're going to run a Grp III oil, Pennzoil Platinum is what I would use...better additive package vs Mobil 1 and the hydrocracking process Pennzoil uses takes the base oil to a level where there is little difference between it and a PAO synthetic.

 

[Mischief7m]

thanks for the info, ill have to look into that!

 

[SupraClaou]

What weight oil are you using?

10W40 now in the summer,and in the winter I am thinking to change to
10W30 like Toyota book says...
I use the full synthetic Redline high viscosity engine oil

Is the 10W40 to thick? And it raises my oil pressure a bit?

 

[jdub]

Red Line is good

I would use the 5W-30...you can't have an oil that's too 'thin" (the 5W = cold viscosity) at engine start. The 30 part of the oil weight will easily meet the spec for your engine at ops temp. If you want to go to a 10W-30 in the summer, that's fine, but not really necessary.

 

[Mischief7m]

i could be wrong here, but i thought that the number you should change by season is the first, ie. 5W or 10W, because that number represents the viscosity when cold, both 5W-30 and 10W-30 are the same viscosity at operating temp. the only difference is thickness when cold.

 

[Mischief7m]

damn, just beat me to it haha

 

[annoyingrob]

Back to the original discussion, at idle I get about 20psi of oil pressure, and at operating temperature, my coolant sits about 90c, peaking at 96c in extreme conditions, which is almost identical to the OP.