Evo 8 fresh motor only getting 2-4psi oil pressure
Dec 19, 2016, 03:00 PM
#31
Your issue is not due to oil jets. You need to find the actual issue.
You either have an issue with your oil pump/pick up. Or you did the balance shaft delete without rolling the bearing. It's not likely, but you could have WAY to much side clearance on the rods. Although, I don't think that would cause this drastic of an issue.
That is bad internet advice. If people think there is no need to cool the piston in a forced induction engine, let them deal with that.
You either have an issue with your oil pump/pick up. Or you did the balance shaft delete without rolling the bearing. It's not likely, but you could have WAY to much side clearance on the rods. Although, I don't think that would cause this drastic of an issue.
That is bad internet advice. If people think there is no need to cool the piston in a forced induction engine, let them deal with that.
But if you guys say is better to keep em then I'll do that.
Dec 19, 2016, 03:13 PM
#33
EvoM Guru
iTrader: (1)
.15" or .0015"?
And side clearance is not the bearing clearance. You measure it with a feeler gauge with the rod installed. If side clearance is too big, it allows the oil to escape from the rod bearing too quickly, which will have an adverse effect on oil pressure.
And side clearance is not the bearing clearance. You measure it with a feeler gauge with the rod installed. If side clearance is too big, it allows the oil to escape from the rod bearing too quickly, which will have an adverse effect on oil pressure.
Dec 19, 2016, 04:33 PM
#34
.15" or .0015"?
And side clearance is not the bearing clearance. You measure it with a feeler gauge with the rod installed. If side clearance is too big, it allows the oil to escape from the rod bearing too quickly, which will have an adverse effect on oil pressure.
https://www.youtube.com/watch?v=HsqL7bho2No
And side clearance is not the bearing clearance. You measure it with a feeler gauge with the rod installed. If side clearance is too big, it allows the oil to escape from the rod bearing too quickly, which will have an adverse effect on oil pressure.
https://www.youtube.com/watch?v=HsqL7bho2No
Jan 12, 2017, 04:05 PM
#35
What's the word? Did you find the issue? For your pressure to be that low I would think it involves the pump or the pickup. Not to insult you, but did you install the gears correctly in the pump when you packed it?
Jan 19, 2017, 09:30 PM
#37
Evolved Member
Make sure everything is properly fitted including the insides of the oil pump. There's specifications in the FSM. There's no future in running a new engine on a worn out pump.
I was watching a Youtube video - I think it was on how to change oil. Hey, if they have tools out I will watch. Anyway the guy starts the engine and no oil pressure. The only thing he'd touched was oil and filter. So, he swapped in a different filter and bingo - oil pressure. I wouldn't have thought that possible.
I was watching a Youtube video - I think it was on how to change oil. Hey, if they have tools out I will watch. Anyway the guy starts the engine and no oil pressure. The only thing he'd touched was oil and filter. So, he swapped in a different filter and bingo - oil pressure. I wouldn't have thought that possible.
Jan 20, 2017, 06:39 AM
#38
You're using a gasket on the oil pickup tube right?
That's what I was checking, making sure you aligned the dots.
Is this an oem pump? Brand new case and brand new gears?
What weight oil?
I'm assuming you are using an aftermarket oil pressure gauge? Mechanical or electronic? Have you tried a different gauge?
Where are you tapped for oil pressure reading?
If you pull the valve cover and crank the motor (no fuel), do you see oil seeping out of the lifters?
Last edited by spoolin98; Jan 20, 2017 at 06:48 AM.
Jan 22, 2017, 07:50 AM
#39
There is no point in trying to find the culprit based on if's. It is awful but you have to take it apart.
Some checks can be made with the engine in the car:
- Head HLA torqued down?
- oil jets torque
- general installation of pump, pickup, oil filter housing and oil cooler.
if there is no external leaks and you can't find the problem easily than you have to begin the hard work. Take the pump apart and inspect its gears. If they look fine - I have seen pumps with welded teeth in cars built by renowed shops - than you will have to inspect the bearings.
If the oil is not getting to the head you might have a big leak on the block. The kind that happens when someone delete the balance shafts and forget to change the BS bearings to close the holes, or have issues with a leaking oil jet.
Some checks can be made with the engine in the car:
- Head HLA torqued down?
- oil jets torque
- general installation of pump, pickup, oil filter housing and oil cooler.
if there is no external leaks and you can't find the problem easily than you have to begin the hard work. Take the pump apart and inspect its gears. If they look fine - I have seen pumps with welded teeth in cars built by renowed shops - than you will have to inspect the bearings.
If the oil is not getting to the head you might have a big leak on the block. The kind that happens when someone delete the balance shafts and forget to change the BS bearings to close the holes, or have issues with a leaking oil jet.
Apr 15, 2017, 04:18 PM
#40
Update.
Turns out it was the bearing on the oil pump drive/balance shaft. "Rear one"
You were able to move the shaft up,down and side to side.
I still put a new front cover/ pump just in case since is not fun taking that motor apart.
Pressure is at 22psi at idle and 68psi at 3k rpm
I wanna thank everyone for your help.
Turns out it was the bearing on the oil pump drive/balance shaft. "Rear one"
You were able to move the shaft up,down and side to side.
I still put a new front cover/ pump just in case since is not fun taking that motor apart.
Pressure is at 22psi at idle and 68psi at 3k rpm
I wanna thank everyone for your help.
Apr 17, 2017, 12:17 PM
#41
Update.
Turns out it was the bearing on the oil pump drive/balance shaft. "Rear one"
You were able to move the shaft up,down and side to side.
I still put a new front cover/ pump just in case since is not fun taking that motor apart.
Pressure is at 22psi at idle and 68psi at 3k rpm
I wanna thank everyone for your help.
Turns out it was the bearing on the oil pump drive/balance shaft. "Rear one"
You were able to move the shaft up,down and side to side.
I still put a new front cover/ pump just in case since is not fun taking that motor apart.
Pressure is at 22psi at idle and 68psi at 3k rpm
I wanna thank everyone for your help.
Now it seems your pressure might be too high. 68psi at 3k rpms is ridiculously high. You should have about 10 psi for every 1k rpms's, what is the pressure when you're at WOT?
Apr 17, 2017, 12:26 PM
#42
EvoM Guru
iTrader: (1)
His oil pressure is fine. The 4g63 oil pump makes a lot of pressure. Mitsubishi wasn't ****ing around when they designed...lol
Apr 17, 2017, 03:23 PM
#43
Evolved Member
I remember the warning in my DSM handbook. It was AWD 4G63 with a tiny 14b turbo. The warning - don't use a cheap oil filter because the filter may pop - not their exact words.
Apr 17, 2017, 03:53 PM
#44
EvoM Guru
iTrader: (1)
running 15w50, my car is like 85psi at 3800rpm lol.
Apr 18, 2017, 08:55 AM
#45
That is very high if you still have balance shafts. In my VR4, I see about 70psi cruising down the highway at about 3000-3500rpm, 10w-40 but I do not have balance shafts. At idle, 1000rpm, I am around 20-25psi.