Timing belt issue, need some input

[jdub]

How about the scoring on the front bearing journal of the oil pump shaft (it doesn't look too bad)?

 

[spoolint78]

nope, not bad at all, can't get my nail in it, seems perfectly round still.
I think I will order a new oil pump driveshaft for sure though.

If I do decide to replace the bearing, how the hell do I get it out?

 

[jdub]

You know, you just might get away with a new collar
A new pump shaft will likely be a bit larger on the journals.

It would be very difficult to replace the bearings with the motor in the car...the rear one, damn near impossible. That's why I was asking the questions
If you can measure the bearing clearances, that will tell you where you stand.

 

[spoolint78]

Alright, I will look into measuring the clearances, I gotta find a tool to do it.
Also, I can feel little hairline marks on the oil pump shaft.
I think they were from when I was pulling it out.
Could that be a problem?

 

[jdub]

You mean like tiny ridges along the length?
Those are from when the shaft was cut on a lathe...normal.

 

[spoolint78]

You mean like tiny ridges along the length?
Those are from when the shaft was cut on a lathe...normal.

They are like 3 or 4 lines going across the shaft area. From front to back, instead of around the surface. I guess they might be removed if I get it polished.
Any suggestions on how to remove the bearing?
Here are some pics.

 

[jdub]

That should not be a problem.

 

[Poodles]

More than likely it just needs a new plate and collar.

Already did the hardwork for you:

Plate: 13574-41010
Collar: 90387-26001

amd the instractions on how to install:
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=EM&P=85

 

[spoolint78]

UPDATE:
Replaced oil pump shaft, now oil pressure is much better.
Cold start 80psi.
I put some load on the motor when it was semi warm, oil pressure went up to 110psi.
When warm and cruising around 45psi.

Thanks guys for all the inputs.

 

[Kristian_Wraae]

How high should the oil pressure be when warm at say 4000 rpm and 5000 rpm?

 

[spoolint78]

Average is roughly 10 psi for every 1000 rpm.

 

[Poodles]

You're not going to get over 40PSI on a stock GTE setup...

 

[spoolint78]

^^^
You must be referring to when the oil is hot, might want to clarify that.

 

[Poodles]

No, even then you have the oil squirters and oil cooler circuit to bleed off the pressure.

I've never gotten over 40PSI on the stock gauge even when starting the car in the middle of winter...

 

[ATL88Supra]

wow lots of psi mang