Engine Burning Oil

[240dkw]

I have spent the last few days trying to solve my engine problem with no luck so far. The motor has been running for a week with oil pressure that would get higher with engine RPM. I did a search and figured it was the pressure relief in the oil pump. I took the relief out of the oil pump and everything looked good. After reinstalling it, I had the same problem. I then installed a gauge in the oil sensor port and ran it for a while. It started to run at a nice 60 psi. And I thought I had fixed it but at the same time it started to run really rough. And of course really started smoking out the exhaust. I pulled the plugs and all six looked nasty. Black and oily. The fact that all of the plugs are dirty is odd. I pulled the PCV hose off and ran it for a while to see if any oil was coming from there and back to the intake but it was good.I then did a compression test with the following results.
#1 - 158
#2 - 159
#3 - 160
#4 - 160
#5 - 158
#6 - 157
I then did a leak down test
#1 - 100/92
#2 - 100/94
#3 - 100/92
#4 -100/94
#5 - 100/81
#6 - 100/80
I can hear the air leaking somewhere on both 5 and 6
So I pulled the head off.

There is a fair bit of oily, black soot inside the cylinders. Everything looks good on the head gasket, so I have not found anything yet. As it is in all 6 cylinders I do not understand where it is coming from.
Is it possible for the oil to be passing by the rings and still get that good of compression results?
What would the cylinders look like if it was a coolant leak instead of oil?
 

[Zed Head]

25 minutes ago, 240dkw said:

The motor has been running for a week with oil pressure that would get higher with engine RPM.

 It started to run at a nice 60 psi. And I thought I had fixed it but at the same time it started to run really rough. And of course really started smoking out the exhaust. I pulled the plugs and all six looked nasty.

Is it possible for the oil to be passing by the rings and still get that good of compression results?

What would the cylinders look like if it was a coolant leak instead of oil?

You didn't give any "higher" numbers so the 60 psi that follows has no point of reference.  

It is possible for oil to pass the rings and still get good compression.  The oil scraper rings and the compression are two different sets of rings, with different functions.

Not really clear what the "problem" is.  High oil pressure or running rough or smoking.  Seems like you're assuming that high oil pressure is going to cause problems.

Reminds me of all of the effort I spent trying to solve a "problem" on an old muscle car in high school.  In the end it just need a new set of plugs and points.  No offense, you described several things happening but they might not be connected.

[jonbill]

Those pics don't really look like an oil burner to me, unless its only just started.
It just looks like it's been running too rich.

[240dkw]

It would get over 80 psi when up around 5000 RPM, it followed the engine speed 40-45 at idle and up to 80+. The "problem is a rather large amount of smoke coming out the pipe. I do believe the high oil pressure caused something to happen.

[240dkw]

It did just start to happen, it has only ran in the garage since it started to smoke.

Edited August 9, 2019 by 240dkw

[jonbill]

Does it smoke at idle or only at higher revs?
What colour smoke?
The idle relief should do its job before 80 psi.

[240dkw]

It smokes at idle and a greater amount(a lot) of smoke when reved up. The odd thing is that the higher oil pressure disappeared at the same time it started to smoke. Almost like something let loose. The smoke is blue.

[Datonedatsun]

1 hour ago, 240dkw said:

It smokes at idle and a greater amount(a lot) of smoke when reved up. The odd thing is that the higher oil pressure disappeared at the same time it started to smoke. Almost like something let loose. The smoke is blue.

Can you here rattling from the engine? If so probably the valve guides, if not probably the piston rings 

[Datonedatsun]

1 hour ago, 240dkw said:

It smokes at idle and a greater amount(a lot) of smoke when reved up. The odd thing is that the higher oil pressure disappeared at the same time it started to smoke. Almost like something let loose. The smoke is blue.

Here's an issue some people have, fairly inexpensive to fix and see if it works bad valve stems cause high oil pressure and smoke issues.

 

[Captain Obvious]

Valve stem seals and/or guides have no effect on oil pressure. Can have impact on consumption, but not on pressure.

So just to make sure I understand the issue.... Car had been running great. No problems. Then one day, all of a sudden your oil pressure started running way higher than it used to, and you started blowing blue smoke?

[jonbill]

Valve stem seals and/or guides have no effect on oil pressure. Can have impact on consumption, but not on pressure.
So just to make sure I understand the issue.... Car had been running great. No problems. Then one day, all of a sudden your oil pressure started running way higher than it used to, and you started blowing blue smoke?

I read it as: Oil pressure was observed to be "high", relief valve was removed or Modified and then it started smoking.

[240dkw]

Captain: Sorry for the confusion, jonbill is correct. It has been running great, but with high oil pressure for about 100 miles or so. Then I checked the relief valve, all good with no modification. Started it up again and still had the problem.. Shut it down, installed gauge started it up and pressure was good at 61 psi.
Shut it down and installed a new pressure sensor I had. Start it up and reading was good, but started running rough. Looked in rear view mirror and large cloud of blue smoke. This all happened in the space of 15 min. The two problems might not be connected as Zed Head eluded to but it seems to me that they are connected.

Edited August 9, 2019 by 240dkw