Oil filter failure

DrAllis wrote: Remove the base and make absitively sure the hole into the block is open and can easily let air blow thru it and the base is free flowing as well to the block.

Would a restriction at the filter base cause the excessive pressure at the oil line outlet on the side of the block?

Thanks for all the help so far,
Denis

I removed the pressure relief valve and started the engine, with the ball and spring removed I read right in the middle of the factory gauge at the oil filter base and my 100 PSI gauge barely moves measuring at the port on the side of the block.

I have the filter on, but no relief valve in it and still have about 15 psi. 

I'm not there looking at it, but, you seem to have something seriously wrong here. A D15 engine has a different oil pump/filtering system than a D14 does. A D14 oil pump is camshaft driven at the rear and 80% to 90% ? of all the oil is pumped directly into the hollow camshaft up against the ball and spring in the front camshaft nose and is pressurized. The hollow camshaft has three cam bearings and they take oil from the hollow cam to the main and rod bearings. The hollow camshaft is the main oil galley. You are getting little to zero oil to your bearings as you describe it!!!!! The remaining 10% to 20% of the oil comes out thru the single external small diameter tube and up thru the filter base small vertical tube for the slow cotton type filtering process and then clean oil returns thru a hole in the block to sump. A D15 engine is similar but very different. All 100% the oil of a D15 comes out of the pump thru the external steel tube (3/8" diameter) and thru the filter base (different base than a D14) thru the larger full-flow paper filter (Fram PH8A) and then OUT of the base thru another external 3/8" diameter steel tube and into a brass 90 degree elbow into the block at the center canshaft brg location. 100% of the oil goes thru the filter and enters the hollow camshaft at the center cam brg for distribution of all filtered oil to the center-front-rear cam brgs and then the mains and rods. The ball and spring still regulate oil pressure inside the hollow camshaft. It's like somebody has installed a D15 pump on a D14 engine...?????

DrAllis wrote: I'm not there looking at it, but, you seem to have something seriously wrong here. A D15 engine has a different oil pump/filtering system than a D14 does. A D14 oil pump is camshaft driven at the rear and 80% to 90% ? of all the oil is pumped directly into the hollow camshaft up against the ball and spring in the front camshaft nose and is pressurized. The hollow camshaft has three cam bearings and they take oil from the hollow cam to the main and rod bearings. The hollow camshaft is the main oil galley. You are getting little to zero oil to your bearings as you describe it!!!!! The remaining 10% to 20% of the oil comes out thru the single external small diameter tube and up thru the filter base small vertical tube for the slow cotton type filtering process and then clean oil returns thru a hole in the block to sump. A D15 engine is similar but very different. All 100% the oil of a D15 comes out of the pump thru the external steel tube (3/8" diameter) and thru the filter base (different base than a D14) thru the larger full-flow paper filter (Fram PH8A) and then OUT of the base thru another external 3/8" diameter steel tube and into a brass 90 degree elbow into the block at the center canshaft brg location. 100% of the oil goes thru the filter and enters the hollow camshaft at the center cam brg for distribution of all filtered oil to the center-front-rear cam brgs and then the mains and rods. The ball and spring still regulate oil pressure inside the hollow camshaft. It's like somebody has installed a D15 pump on a D14 engine...?????

A properly working D14 filtering system will have a small volume of oil coming up into the cotton filter and running freely back into the side of the block. The only pressure there is comes from the resistance of the cotton filtering media. A new filter shows less oil pressure than an old dirty filter. The gauge only reflects what is going on inside the filter, not necessarily the rest of the engine. You have to have a higher than normal volume of oil coming to the filter to cause this much pressure at the filter area. Put that ball and spring back where it belongs to at least keep pressure to all mains and rods. Funny the pressure regulator is missing a part.....it's like there's been something wrong for a long time????

 D14 and D15 camshaft pressure regulator and camshaft thrust spring parts are all the same.....two springs on each and a ball, thrust plate etc....all that stuff is identical. The oil pumps are different !!! ...the D15 has a small ball and spring inside the rotor called a pressure regualtor (I assume for cold oil starts and allows oil to go directly to the hollow camshaft) and the D14 does not have this. Oil pump is a 70237078 for D15 and 70228128 for D14 oil pump.

The pipe coming up out of the clutch housing on a D14 is only 1/8 pipe, and the D15 pump is bigger maybe 1/4'' pipe. I suppose somebody could have adapted the D14 plumbing to the D15 pump and all the oil is trying the go through the filter like Dr Allis said, and the cold safety relief is letting enough through into the cam and has kept the engine from seizing.

He How do you get the oil filter out to 1973 HD6EP it seems that they don't give you enough room to pull the housing out? Any Ideas where oil drain plug is. Do you need to take the rock Shields  off to get to it?

Well, the pump seems correct. So if we assume it is, where is the next place to start looking for my issue? Is it possible that with the cam thrust plate missing the cam is walking forward and blocking the oil passages on the front or rear bearings?

Gatordoc wrote: Could it have spun the cam bearing?

Especially without the thrust plate!

I guess the place to start is to find a thrust plate and go from there. If that doesn't cure it I guess I'll have to tear it down and see whats going on.

Don't the 'rod' bearings get their oil from oil being sprayed out tiny holes in the cam ?

You wouldn't have any rods or mains if you don't get this fixed.  It really does sound more and more like the cam bushing have turned and blocking all oil from rest of engine.