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#4620415 - 01/01/18 09:52 AM 0 oil pressure for 10 seconds
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
Happy New Year. Well had to use the 02 jeep this morning. It was -32. Nose of jeep was pulled in the garage a little. Went to start and it turned over slow but did start. Was watching oil gauge and it showed O for about 10 seconds. Then a light came on beeping check gauges. Then the gauge started showing pressure and light went out. Never knew this light was even there in 6 years. Jeep has the 4.0. Just serviced about a month ago with valvoline maxlife 5w30 SB and added a little zinc and 1/4 bottle of lubro moly mos2 and motorcraft FL-1A. Does it sound like the adbv did not open quick enough. This is a top thread adbv. Your opinions are appreciated.
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#4620426 - 01/01/18 10:01 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
PimTac Offline


Registered: 03/04/17
Posts: 4315
Loc: Soviet State of Washington
At those temps I would be using a block or pan heater. How was the engine noise on startup and for the first moments?
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#4620433 - 01/01/18 10:08 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
dlundblad Offline


Registered: 09/30/13
Posts: 10045
Loc: Indiana
I had the same thing with my Jeep in -27*F. 10w30 PYB and a Mopar filter.

First time I heard the check gauges chime too.

I am assuming you mean the bypass as opposed to the ADBV. I am sure both functioned properly given the conditions. -32* (be it *F or *C) is cold!


Edited by dlundblad (01/01/18 10:08 AM)
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#4620446 - 01/01/18 10:17 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
tig1 Offline


Registered: 01/03/09
Posts: 13661
Loc: Illinois
This is an example of slow oil flow in extreme cold temps. Perhaps changing to a 0-30 would help.
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#4620447 - 01/01/18 10:19 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
SuperDave456 Offline


Registered: 10/29/08
Posts: 2473
Loc: Dallas, Texas
Maxlife is a synthetic, but it's pour point is -40 degrees F if I remember correctly.
-32 F is getting close to that.

+1 for some kind of block heater.
BTW, Even if it is just a shop lamp with an old school 60 watt incandescent bulb placed under the oil pan 20 minutes before driving, I've heard of such measures significantly helping at such temperatures.

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#4620453 - 01/01/18 10:23 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
CostaCaptain Offline


Registered: 12/10/17
Posts: 9
Loc: Costa Rica
-32f is exactly freezing point and as the Jeep was with the nose in the garage engine temp was probably a tad higher.
I would exclude something frozen excepth the oil pressure sensor get stuck for some seconds.
The ADBV (Anti Drain Back Valve)avoid that the oil drain back to the sump and should keep the oil in some parts of the upper part of the engine.
If the valve would be stuck close then the oil pressure would rise fast, if she is stuck open then all the oil drians back in the sump and
the oil pump has to fill all oil conducts after every start.

However, if the oil pressure is really near zero for 10 seconds than that's not a good thing!
As long the oil pump is good and sucking oil she should build up pressure much quicker.

Chris

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#4620458 - 01/01/18 10:27 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
The jeep always had a light piston slap when I purchased 6 years ago with 55,000 now have 168,000 miles. Once engine is warm no slap at all. This morning there was no more noise then usual (actually a little less). Dead quite when warm and driving. Use to run maxlife 5w30 conventional or Quaker state defy 5w30 conventional. Now both are synthetic blend and was a little more noisy. That is why I add the little zinc and moly.
_________________________
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#4620461 - 01/01/18 10:28 AM Re: 0 oil pressure for 10 seconds [Re: PimTac]
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
Originally Posted By: PimTac
At those temps I would be using a block or pan heater. How was the engine noise on startup and for the first moments?
The jeep always had a light piston slap when I purchased 6 years ago with 55,000 now have 168,000 miles. Once engine is warm no slap at all. This morning there was no more noise then usual (actually a little less). Dead quite when warm and driving. Use to run maxlife 5w30 conventional or Quaker state defy 5w30 conventional. Now both are synthetic blend and was a little more noisy. That is why I add the little zinc and moly.
_________________________
I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0

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#4620464 - 01/01/18 10:30 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
RedOakRanch Offline


Registered: 11/10/13
Posts: 846
Loc: Central Coast California
At that temp I'm pretty sure you had no oil for those 10 seconds.
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#4620490 - 01/01/18 10:55 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
ragtoplvr Offline


Registered: 01/14/15
Posts: 529
Loc: missouri
What oil you did have on the bearings would be more the consistency of a very light grease. It is doubtful anything was harmed. The anti drainback valve probably did not seal and allowed the oil galleys to drain. You would have had some flow to the bearings before the gauge could respond. Cold weather is hard on equipment, and the automakers test for it. I have heard they test at -40 if the winter lets them.

Rod

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#4620504 - 01/01/18 11:14 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
Cujet Offline


Registered: 02/15/03
Posts: 7162
Loc: Jupiter, Florida
Way too cold for that oil. There is no telling whether damage happened or not. Might depend on the last shutdown and how hot it was. Remember even with pressure indicated, many components may not have flow. Such as the bearings farthest from the filter. As the rod bearings get flow through the main bearings and drilled passages on the crank.
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#4620506 - 01/01/18 11:15 AM Re: 0 oil pressure for 10 seconds [Re: tig1]
PimTac Offline


Registered: 03/04/17
Posts: 4315
Loc: Soviet State of Washington
Originally Posted By: tig1
This is an example of slow oil flow in extreme cold temps. Perhaps changing to a 0-30 would help.




Tig1 has a good suggestion here. Being that the OP is in Vermont, cold winters are the norm perhaps not this cold but nonetheless. Having a heater just helps the engine.

Someone else mentioned that -31F is just freezing. I would rethink that.
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2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4620516 - 01/01/18 11:27 AM Re: 0 oil pressure for 10 seconds [Re: PimTac]
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
Agree Tuesday will look for a block heater. These temps will continue through this and next week. Heck we haven't even gotten to the cold months yet
_________________________
I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0

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#4620532 - 01/01/18 11:44 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
Bxnanaz Offline


Registered: 11/28/17
Posts: 86
Loc: SC, USA
Originally Posted By: littleant
Agree Tuesday will look for a block heater. These temps will continue through this and next week. Heck we haven't even gotten to the cold months yet


You really should also look into some full syn 0w-30 as well.

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#4620538 - 01/01/18 11:48 AM Re: 0 oil pressure for 10 seconds [Re: littleant]
CostaCaptain Offline


Registered: 12/10/17
Posts: 9
Loc: Costa Rica
sorry but i may missunderstood, you are talking of -32F and that is -35 celsius.
Yes, this is cold and may explain the low oil pressure.
If temp drops frequently so low then a block heater would be a good solution, and a 0W-40 oil will aso help with cold start.
Chris


Edited by wwillson (01/03/18 07:46 PM)
Edit Reason: censor bypass

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