A-460 Block Oil Pressure gage port location/Back at it!!! Still lost

That hole is not exactly straight ... it is on about a 5 degree angle and is right above the drilling coming up from the rear main bearing saddle.

Yes, it is angled about 5* or so, off of vertical. However, it is a straight 5/16" drilled passageway that first intersects the horizontal lifter galley passageway, and then intersects the horizontal dedicated main galley passageway,,,,,,,,on the SVO A-460 blocks.

Charlie

Thursady night I will go back out and look. Can to much clearance between the lifter and the lifter bore create a problem like this???
Just a thought. I have a different brand of lifters I can put in and try.


Tore

I don't have any restrictions and I have the gauge in the back and a kasse pump.

Are you running a solid roller cam and roller rockers?

Tore

Tore,

Bummer about the oil issue, I have mine Plummer to the back of the block along with the accumulator. I suspect Charlie and the others are correct. It's not drilled all the way through.

Will be interesting to discover the issue.

I put a stroked 427 FE in my car once to discover a lack of oil pressure. Turns out the plunger and spring in the back if the block were installed wrong.
D
Good luck my friend and I hope it's something simple.

Tore,
What is easier, pulling the motor or trans? Maybe you can pull the trans, remove the flexplate/flywheel and take out the rear gallery plugs. If you can get your hands on a bore scope or at worst a flexy light/flextorch and some wire feed in from the top you can confirm if the passage intersects with the dedicated mains gallery.
Then you will know your next move.
Cheers Colin.

hienergy557 wrote:Tore,
What is easier, pulling the motor or trans? Maybe you can pull the trans, remove the flexplate/flywheel and take out the rear gallery plugs. If you can get your hands on a bore scope or at worst a flexy light/flextorch and some wire feed in from the top you can confirm if the passage intersects with the dedicated mains gallery.
Then you will know your next move.
Cheers Colin.

He's already completed those tasks. He's going to plum a line from the front port to the back. I think that will work until he can dissassemble the block to find the real issue.

This might be a long shot, but is there any chance you have the oil gallery inhex plugs mixed up? That is, the plugs with the tapered ends in the back of the block rather than the front?

I too think there is something wrong with the oil system. There is a massive restriction or oil loss in there somewhere.

The A460 FRPP blocks do not use the same front plugs of the production blocks.......all plugs are the same.

I would pull it apart now to find the problem before it cost him a hell of a lot more later, but I know some people are just to lazy so that the way it is.....

the Coug wrote:I would pull it apart now to find the problem before it cost him a hell of a lot more later, but I know some people are just to lazy so that the way it is.....

Easy Coug..............

Well went out and checked the Vertical hole on the back Charlie talked about and I can drop a 6" screwdriver down the hole so that doesn't seem to be the problem.
As Rick stated I put a hose from the side of the block up to the back port and spun the drill and had 90 psi coming off that T Fitting on the back cold.

I have no idea whats going on.

I will probabaly pull the engine in the next few weeks and try to find whats going on.


Tore

I'd run it.

I am kind of thiking a I will Lem, But I can't figure out where the issue is and thats eating my ASS
Tore

Just went back and read this again.

You state that if you put a solid plug at either end of the lifter gallery you end up with zero pressure on the gauge.

If this is indeed an A460 block that rear port should see full pump pressure at all times. It connects to the main priority gallery directly.

The fact that the pressure goes to zero when you plug the lifter gallery tells me that there is no crossover to the main gallery in the back of your block. It does not matter how deep the hole is if it doesnt intersect the main gallery.

It sounds just like an Eliminator block where you see pressure back there after everything bleeds past the lifters etc. Been there done that.

On my A460 block the passage that is drilled down through the valley in the little tower did not intersect and I only had oil to the passenger side lifters.

Stuff happens. Check everything.

dkp

Tore wrote:Are you running a solid roller cam and roller rockers?

Tore

if you're asking me this ,yes.