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#4372173 - 04/05/17 08:22 AM Low oil pressure solved , dropped the pan
groomerz Offline


Registered: 10/15/09
Posts: 16
Loc: Chicago
make a long story short got a used es300 for my newbie driving daughter with 140 k . I'm going thru the car myself and replaced battery, sway bar link, belts, power steering hose and rebuilt power steering pump. Since the engine is a known sludger I put in M1 5/30 high mileage to slowly clean motor. Engine runs like swiss watch. I drive it for a couple weeks to make sure everything is ok. I notice after I exit the highway at idle at stoplight. Oil pressure light pops on for a second. I put in neutral and it goes out. I go home and remove oil sender. Sender is new and had been recently changed. I change sender again as I didn't have a 90 fitting for my pressure tester. Light still flickers after a highway run at idle. So I think I found out why car was sold. Knowing this engine was a known sludger I drain oil and drop pan. There is some varnish only. I remove oil pump and inspect it. the screen is 75% clogged. I start cleaning the screen and realize it is not sludge, I am removing rubber. i then find a circular piece of rubber on the screen. It is the darn pvc grommet. Someone replaced pvc and grommet. Old grommet must have fallen into valve cover where it melted into the oil and congealed on the oil pump screen. put it all back together and drove it for a week and no issues. So if you have low oil pressure always drop the pan and check the pick up screen for debris and the oil pump bolts are tight. The old 740's were known to loosen there pump bolts and cause low oil pressure grenading engines.
_________________________
2002 Lexus Ls 430 98k
2009 Lexus RX350 90k
1998 Lexus ES300 141K

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#4372181 - 04/05/17 08:36 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
Pop_Rivit Offline


Registered: 02/09/08
Posts: 6367
Loc: Midwest
Don't you wonder how many BITOGers would have blamed the oil filter for the problem if you had posted about it before finding the answer? Or claimed that the issue was caused by oil that was too thin?

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#4372182 - 04/05/17 08:37 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 11970
Loc: N.H, U.S.A.
Great post, thanks! Love to hear about logical diagnosis of engine problems - or any problem for that matter smile
_________________________
2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter

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#4372199 - 04/05/17 09:03 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
WillsYoda Offline


Registered: 10/17/15
Posts: 471
Loc: MN
I almost lost a PVC grommet into that 1mzfe engine in my car. It would have been a royal pain to get it out had it fallen under the rear valve cover. I was holding on to it for dear life for a good while with a needle nose and finally pulled it out.

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#4372208 - 04/05/17 09:15 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
Recalculating Offline


Registered: 08/04/12
Posts: 450
Loc: New York
This DIY story is a BITOG classic. Good story and ending. Kind of message that keeps us going in the garage on our own appliances. Thanks for the post.
_________________________
2009 Honda CR-V EX-L 55k
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#4372209 - 04/05/17 09:18 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
kschachn Online   content


Registered: 12/26/05
Posts: 9416
Loc: Upper Midwest
There is a baffle system on the underside of the valve cover for those engines, even if you drop the PCV grommet into the cover it won't drop into the head. I really can't see how the grommet would "liquefy" in oil either, from what I've seen the polymer gets more rigid rather than softer.

I dropped a grommet once when changing the PCV valve on my 1MZ-FE (before upgrading that cover to the new design) and I was able to fish it out of the baffle underneath. It wasn't particularly easy but it didn't drop into the cams.

Here is a thread I made a while back when I replaced that cover with a new one. Note that there isn't a "free drop" from the PCV hole through the cover:

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3397521/1MZ-FE_Rear_Valve_Cover_Change
\
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

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#4372216 - 04/05/17 09:25 AM Re: Low oil pressure solved , dropped the pan [Re: Recalculating]
Ihatetochangeoil Offline


Registered: 10/28/14
Posts: 580
Loc: On the road Midwest
Originally Posted By: Recalculating
This DIY story is a BITOG classic. Good story and ending. Kind of message that keeps us going in the garage on our own appliances. Thanks for the post.


^^ +1 Love a happy ending. Always check the simple stuff. Thanks again.
_________________________

2003 Lesabre
2004 Lesabre
2004 Impala
If ur NOT doing UOA then you're throwing away good oil or your engine is already damaged. Choose.

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#4372231 - 04/05/17 09:46 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
kschachn Online   content


Registered: 12/26/05
Posts: 9416
Loc: Upper Midwest
Originally Posted By: groomerz
make a long story short got a used es300 for my newbie driving daughter with 140 k . I'm going thru the car myself and replaced battery, sway bar link, belts, power steering hose and rebuilt power steering pump. Since the engine is a known sludger I put in M1 5/30 high mileage to slowly clean motor. Engine runs like swiss watch. I drive it for a couple weeks to make sure everything is ok. I notice after I exit the highway at idle at stoplight. Oil pressure light pops on for a second. I put in neutral and it goes out. I go home and remove oil sender. Sender is new and had been recently changed. I change sender again as I didn't have a 90 fitting for my pressure tester. Light still flickers after a highway run at idle. So I think I found out why car was sold. Knowing this engine was a known sludger I drain oil and drop pan. There is some varnish only. I remove oil pump and inspect it. the screen is 75% clogged. I start cleaning the screen and realize it is not sludge, I am removing rubber. i then find a circular piece of rubber on the screen. It is the darn pvc grommet. Someone replaced pvc and grommet. Old grommet must have fallen into valve cover where it melted into the oil and congealed on the oil pump screen. put it all back together and drove it for a week and no issues. So if you have low oil pressure always drop the pan and check the pick up screen for debris and the oil pump bolts are tight. The old 740's were known to loosen there pump bolts and cause low oil pressure grenading engines.


You actually removed the oil pump? That isn't easy on a 1MZ-FE.
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

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#4372251 - 04/05/17 10:07 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
Donald Offline


Registered: 03/21/04
Posts: 20463
Loc: Upstate NY
Better than finding chunks of piston skirt like you might find in a Jeep 4.0 engine!
_________________________
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


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#4372265 - 04/05/17 10:23 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
joegreen Offline


Registered: 03/10/13
Posts: 760
Loc: NY
I have a 2000 es300. Its been in the family since new and I know that pcv grommet is original. I'll have to check and see if its old and hard and needs replacing.
_________________________
1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le

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#4372292 - 04/05/17 10:46 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
FZ1 Offline


Registered: 02/07/08
Posts: 4727
Loc: Texas
Genius.

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#4372312 - 04/05/17 10:59 AM Re: Low oil pressure solved , dropped the pan [Re: Donald]
Miller88 Offline


Registered: 04/09/08
Posts: 12704
Loc: Onondaga County
Originally Posted By: Donald
Better than finding chunks of piston skirt like you might find in a Jeep 4.0 engine!


That's what I expected on mine.

Instead I found oil pump bolts and a loose oil pump.

Once the oil pump was put back on , the engine stopped knocking and I had good oil pressure again!
_________________________
18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M

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#4372348 - 04/05/17 11:46 AM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
FlyingVan Offline


Registered: 11/21/16
Posts: 123
Loc: Tennessee
Ages ago I had a 1991 Ford Ranger that was taking for ever to build up oil pressure when cold. I started with the obvious, but nothing helped. Then I was going to change the oil pump. When I dropped the pan I found the pick up screen almost totally clogged by bits and pieces of either rubber or silicone, whatever the pan gasket was made out of (I forgot since it has been so long). The gasket dried up and cracked and it ended up in the oil pan, interestingly enough, oil wasn't leaking anywhere. I tried to clean the screen, but I wasn't too successful, so I ended up replacing the pick up tube. I got rid of that truck many many years after this and as of last year it was still on the road.
_________________________
2017 Volkswagen Jetta 1.4TSI, 30k
2016 Volkswagen Jetta 1.4TSI, 30k
2011 Volkswagen Jetta Sportwagen TDI, 90k
2004 Dodge Sprinter 2.7 5cyl diesel,774k

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#4372374 - 04/05/17 12:01 PM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
KrisZ Offline


Registered: 12/23/06
Posts: 7473
Loc: Toronto, Canada
I'm surprised and impressed at the same time that such a problem could be nailed down by a simple pan drop without doing a series of UOAs. grin


Seriously, great job and thanks for sharing!. thumbsup
_________________________
2015 Dodge Grand Caravan-21k miles.
2006 Mazda 3-155k miles

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#4373260 - 04/06/17 02:21 PM Re: Low oil pressure solved , dropped the pan [Re: groomerz]
sleddriver Offline


Registered: 02/06/10
Posts: 4607
Loc: Central Texas
thumbsup
_________________________
1998 Volvo V70 T5 226,808 mi. Original Owner.
M1 10W-30 HM
"It's never a mistake to buy tools, defined broadly. They're not a cost, they're an investment." - J.B. Peterson

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