Bump thread again. Signifigant new development in oil pressure saga.
First reply to two earlier posts:
With my new development now below ...
Yes, I am beginning to appreciate that it would be very good and helpful, in this situation, to have a real OIL PRESSURE GAUGE.
To know the REAL oil pressure at various times / conditions.
So yes, good idea, if having issues like flickering oil light - to, yes, "install aftermarket oil pressure gauge" somehow.
[ I did see a pretty good one at Princess Auto for only about $20 ]
Oil Pressure / Oil Flow - I think are both related. Yes, need to have BOTH .
[ Oil lubricates as well as cools. Flow=cooling capacity, as well as lubricating capacity. Pressure, to give the flow, and to drive the oil and the flow.
I think they are interrelated. ] Yes, Yes, Yes.
Now to the new development:
On a short highway run recently, week or two ago, oil pressure on car really DID drop to zero.
Dash light, from NEW oil pressure sender came on SOLID, at highway cruise speed.
So that was a real pressure drop to near zero.
Engine started to miss and studder a few times, but continued to run quite well.
I was pretty sure I had a real serious problem this time.
I pulled off next hwy exit, went a few more KM to get to a safe destination / parking lot.
Engine valve train started to tick a little. With some signs of hesitation, lower power, and the odd miss / stutter.
Made it to a parking lot, slow n easy, at idle, and she stalled, at idle.
I do not know if any major damage done.
Anyway - the Taurus was re-started to try later, and it started, but made a machine hiss sound, so I shut it down right away.
Towed it to driveway later.
Up on blocks in driveway, Working on it myself now at home ( I do not think worth to pay mechanic on this old car).
I am in the process of dropping oil pan to investigate.
Current Progress: Up on blocks in driveway.
Battery disconnected, Oil and filter out. Starter disconnected and removed. Cover plate beside is out.
Finally got the two lower Oxygen sensors out without damage. Got the special socket with slot cut, but it was too loose, it was a 7/8" unit.
I custom made a O2
sensor removal socket, from a 22mm deep socket, 6pt, face machined end so it fits all the way down on the thin nut,
and cut the slot myself, thinner, about 1/4 slot, and then clamped end with worm hose clamp when dissassembling to clamp solid. then got em off
carfully with clr, penetrating oil, and TLC.
If you recall in earlier post #9, of date 7-9-2017 in this thread - I knew oil pressure was low / below spec / by test and measurements.
So new advice then to all:
If you really have low oil pressure / signifigantly low / by direct measurement - then in the long run something may be bound to fail
You may want to consider, planning to install real Mechanical Oil Pressure Gauge, to know better what's going on all the time.
(watch for situation / pressure / dropping more and more. It did happen with my Taurus, shown by new oil pressure sender, flickering
more and more, even with new oil and filter... I did have indication of upcoming failure. )
You may also want to consider taking action, at some convenient time, ahead of time: like: drop pan and investigate oil pump etc.
I have been able to keep the car going, by more frequent oil & filter changes - but it seems something finally / untimately failed.
Needing frequent oil and filter changes, flickering oil light, more and more, noted low pressure, and oil analysis indicated "extreme bearing wear" /
bearing metals in used oil of only 1000km. So, low oil pressure (and flow) and flickering light did lead to bearing wear far beyond "normal"
This is really interesting ... Good / normal oil pressure (& Flow) is very important for bearing lubrication. Not to mention top end / valvetrain - which I did also have some issues with.
Good ... if it failed now, solid, middle of summer, I can disassemble and try to investigate myself.
[ much better than middle of winter here, with -20 deg C or more ! and this was my winter car. ]
Let's see if I can bring the old Taurus back to life ! If she is not totally F'd ...
Stay tuned - I will try to report more later. May be a few weeks.