Recent Topics
Hit a shopping cart at 30mph
by LeakySeals
2 minutes 13 seconds ago
Let's Talk Bed Pillows
by LoneRanger
40 minutes 59 seconds ago
Changed Speedo Gear on 700r4 Tailshaft
by Pike51
42 minutes 19 seconds ago
Which do you prefer: ZL-1 Camaro or GS Corvette ?
by Mr Nice
Today at 08:41 AM
CVT Discussion
by Sierra048
Today at 08:28 AM
Can't get Unifi AP V2 to work on TDS...
by WhizkidTN
Today at 07:34 AM
Need mini grease gun
by Duffyjr
Today at 07:02 AM
Mazda 6 O2 sensor - CA emission
by Chester11
Today at 06:57 AM
Brake Bleeder
by supton
Today at 06:56 AM
As close to blowing out as you can get
by wwillson
Today at 06:04 AM
changing tranny filter
by Dennisistheman
Today at 06:04 AM
From small things...
by Silk
Today at 05:57 AM
Anyone signing up for the Space Force
by Shannow
Today at 03:58 AM
Pennzoil Platinum at Walmart
by TheLawnRanger
Yesterday at 11:21 PM
Mopar OEM and Fram Ultra Oil filters, '18 Jeep JL
by IndyFan
Yesterday at 10:45 PM
What’s the odds..
by Eric Smith
Yesterday at 09:51 PM
Who can relate?
by Reddy45
Yesterday at 09:43 PM
No more oil changes
by goodtimes
Yesterday at 09:19 PM
Separating toddlers from their parents?
by fdcg27
Yesterday at 08:50 PM
gm 8.6 truetrac
by Spitter
Yesterday at 08:45 PM
Newest Members
Theraven, battleman13, Shassis, Santo, aligoodn
65276 Registered Users
Who's Online
91 registered (alphadog, 853okg, 28oz, 9050lx, 2015_PSD, 2009Edge, 9 invisible), 1495 Guests and 29 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65276 Members
67 Forums
285641 Topics
4766903 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 4 1 2 3 4 >
Topic Options
#4501976 - 08/30/17 06:16 AM Valvetrain sludge: 2007 Toyota 4Runner
crainholio Offline


Registered: 10/31/03
Posts: 174
Loc: NJ
I picked up an '07 4Runner with 163K miles, 4.0L V6 as a project...chronic P0016 variable valve timing error, bank A. Pulled the passenger side valve cover to verify timing and found a minor sludge-fest as shown in the pics below. Maintenance records are very sparse on CarFax and Toyota, the original owner said he had a local shop do the oil changes at 5K mile intervals, unknown oil brand. The P0016 code is gone after removing and cleaning the intake cam (sludge accumulation in the VVT oil passages) and replacing the big VVT actuator on the front of the intake cam. I'm running Rotella T6 0W-40 and a Toyota filter. Will be back under the valve cover soon to replace the [censored] aftermarket #2 timing chain tensioner, the nylon pad is being touched by the #1 chain at idle causing a clicking sound.

Sludge pics below, feedback is appreciated:



Top
#4501993 - 08/30/17 06:54 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
PimTac Offline


Registered: 03/04/17
Posts: 4259
Loc: Soviet State of Washington
A lot of heavy varnish there. Did you clean out any sludge? If not, it's actually not all that bad looking from the pics and considering the 163k miles on the engine. Also we could assume cheaper oil was used.

Do you plan to run some short OCI's to work on that varnish?
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


Top
#4501995 - 08/30/17 06:55 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
Kuato Offline


Registered: 10/23/05
Posts: 7094
Loc: Colorado
Looks like you caught it in time...with some TLC it should be good to go. The 4.0 is a good engine generally.

I don't think the previous owner was entirely truthful about the oil change regimen....
_________________________
Thick vs Thin test: 15k / 43k miles complete

Top
#4501998 - 08/30/17 06:58 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
2015_PSD Online   content


Registered: 09/26/10
Posts: 7234
Loc: SE Texas
Four or five cans of Berryman B-12 Chemtool to hose down the valve train area followed by an immediate OC and some short OCIs thereafter will have it looking like new.
_________________________
2018 MB AMG GLC43 3.0L Coupe - M1 0W-40/OEM
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 5W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU

Top
#4502011 - 08/30/17 07:10 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
Sayjac Offline


Registered: 10/13/08
Posts: 12258
Loc: The Old North State
Not awful, seen much worse. Some heavy varnish, light-ish sludge areas. Also doubting history of regular 5k oil changes even with bulk API rated conventional.

Perhaps some shorter ocis using synthetic and gradual clean up. No drastic measures needed IMO.

Top
#4502025 - 08/30/17 07:25 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
crainholio Offline


Registered: 10/31/03
Posts: 174
Loc: NJ
Thanks for the feedback. I cleaned the valve cover w/ B12 and a nylon brush, good high pressure airgun blast after it dried. Inside, I only cleaned the intake cam, bearing caps, and bolts. Found solid sludge in the cam oil passages that supply pressurized oil to the VVT actuator and scrubbed them out gently w/ small nylon brush from Harbor Freight (airgun cleaning brush set $1.99).

I'm letting the T6 0W-40 do what it can to gently clean the remaining sludge. It'll have approx 500 miles on it when I open it back up this weekend to replace the #2 timing chain tensioner again, will snap pics for comparison but I'm not expecting to see much improvement as yet.

My theory on the P0016 error was either sludge blocking the pressurized oil feeds to the VVT actuator, or the actuator itself clogged/jammed with sludge. I had already replaced the VVT solenoid and cleaned the VVT oil filter screen prior to opening up the valve cover, neither move had corrected the error. It's a fun project thus far.

Top
#4502027 - 08/30/17 07:30 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
Chris Meutsch Offline


Registered: 02/27/06
Posts: 2631
Loc: Cincinnati
Good on you for cleaning up/fixing up this vehicle that will last another 10 years.
That isn't nearly as bad I was expecting. I would change the filter at 500 and let the oil run another 500, and then put whatever is spec'd, full syn. It will be just fine.
_________________________
2005 Honda CR-V EX, 254k.
2008 Honda Pilot EX-L, 96k.

Top
#4502037 - 08/30/17 07:42 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
crainholio Offline


Registered: 10/31/03
Posts: 174
Loc: NJ
The really interesting thing is the sludge buildup on the #3 bearing caps. Little to no sludge on the #1 and #5 caps...the close-up shot is the #3 cap on the exhaust cam. Seems like there may be more heat or less oil spray there.

Top
#4502083 - 08/30/17 08:38 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
krismoriah72 Offline


Registered: 02/16/09
Posts: 1518
Loc: wv
Looks like oil condensation from short trips. assuming that the pcv and hose are clean and working properly.

Top
#4502086 - 08/30/17 08:43 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
JTK Online   content


Registered: 08/14/03
Posts: 10564
Loc: Buffalo, NY
Cool pics! Doesn't look bad to me at all given the age and mileage.
_________________________
2017 Ram 1500 4x4, 3.6L. 2016 Nissan Quest SV (Babe magnet IV)

Top
#4502088 - 08/30/17 08:45 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: JTK]
kschachn Offline


Registered: 12/26/05
Posts: 9391
Loc: Upper Midwest
Originally Posted By: JTK
Cool pics! Doesn't look bad to me at all given the age and mileage.

Gee whiz I think it looks awful for that mileage. My ancient Sienna with nearly 400K miles doesn't look anything like that.

I have a very hard time believing there were consistent 5K oil changes on that engine regardless of what oil was used.
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

Top
#4502100 - 08/30/17 08:57 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
The Critic Offline


Registered: 08/30/04
Posts: 19797
Loc: CA
Make sure the headgasket is still good on this motor. The older 4.0s would sometimes develop headgasket leaks and that could be responsible for your sludge.
_________________________
2011 Toyota Prius - 168k - ServicePro Dexos 0W-20
2007 Honda Accord 2.4 - 128K - Idemitsu 5W-20

Top
#4502104 - 08/30/17 09:02 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
Dorian Offline


Registered: 12/07/15
Posts: 300
Loc: Ohio
I agree with the two statements above. It doesn't look all that great. However, a project is a work in progress!
_________________________
99 Camry 5S M1 AFE 0W30 194K
14.5 Camry SE 2AR 0W20 M1 AFE 36K (Mom's)
98 Chevy Prizm 1ZZ M1 AFE 0W30 146K (Brother's)

Top
#4502106 - 08/30/17 09:05 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
danez_yoda Offline


Registered: 07/18/09
Posts: 464
Loc: texas
Originally Posted By: crainholio
The really interesting thing is the sludge buildup on the #3 bearing caps. Little to no sludge on the #1 and #5 caps...the close-up shot is the #3 cap on the exhaust cam. Seems like there may be more heat or less oil spray there.


I was looking at the same thing. Might be worth a look underneath to see if you have any galling under there.



Edited by danez_yoda (08/30/17 09:05 AM)

Top
#4502137 - 08/30/17 09:34 AM Re: Valvetrain sludge: 2007 Toyota 4Runner [Re: crainholio]
tig1 Offline


Registered: 01/03/09
Posts: 13657
Loc: Illinois
Looks terrible to me. This is likely the results of dino with extended OCIs. The last time I had an engine look like that was in the 60's using QS.
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


Top
Page 1 of 4 1 2 3 4 >