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Under Valve Cover Pics - 07 Pacifica 4.0L V6 #4807925
07/07/18 07:16 PM
07/07/18 07:16 PM
Joined: Mar 2004
Posts: 1,482
Flaherty, KY
92saturnsl2 Online content OP
92saturnsl2  Online Content OP
Joined: Mar 2004
Posts: 1,482
Flaherty, KY
This is a '07 Chrysler Pacifica with 4.0L SOHC V6 and 6 speed auto. It's a close relative of the SOHC 3.5L V6 which is far more popular. Had the engine bay halfway apart to do a timing belt service @ 129k. Did the plugs, valve cover gaskets, basically everything else within easy reach while I was at it. Unknown maintenance history (car is new to me), there are a couple scribbles in the maintenance manual about two recent oil changes @ 111k and 123k IIRC. Both were Valvoline Synthetic 10w-30.

The car had three owners before me, first was a 2-year lease, the 2nd from 24k - 75k, the last from 75-129k. I contacted the most recent owner on Facebook, it sounded like he didn't do much maintenance on the car-- timing belt service (and about everything else) was skipped which is why I'm doing it now.

Front bank:





Rear bank:





1985 F-250HD 7.5L 4x4 135k- Castrol GTX 15w-40 HDEO
04 Odyssey EX 182k PUP 0w-40
96 Maxima GLE 250k QS Defy 5w-30
07 Chrysler Pacifica Limited 129k Chevron Supreme 5w-20
Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4807928
07/07/18 07:19 PM
07/07/18 07:19 PM
Joined: Sep 2010
Posts: 7,594
Planet Earth
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,594
Planet Earth
I am going to guess that the rear bank runs hotter than the front or does the engine use some sort of cylinder deactivation to improve fuel economy?

Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4807934
07/07/18 07:30 PM
07/07/18 07:30 PM
Joined: Nov 2011
Posts: 1,230
Lyndhurst NJ
Audios Offline
Audios  Offline
Joined: Nov 2011
Posts: 1,230
Lyndhurst NJ
My thoughts as well, rear bank runs hotter. Both looks great, but the front looks fantastic!


2002 VW Golf TDI-Mobil 1 5/40 TDT
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL
2005 BMW M3 BMW Twin Power 10/60
2003 BMW M5-Fuchs 5/40
1998 BMW M3/4/5 Fuchs 5/40
Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4807944
07/07/18 07:40 PM
07/07/18 07:40 PM
Joined: Mar 2004
Posts: 1,482
Flaherty, KY
92saturnsl2 Online content OP
92saturnsl2  Online Content OP
Joined: Mar 2004
Posts: 1,482
Flaherty, KY
Rear bank is stuffed back by the firewall, front bank is more open and has air movement around it the majority of the time. I've seen this before on transverse V6 engines-- the rear bank of my Honda J35 V6 is noticeably darker than the front, though perhaps not to this degree...

No cylinder deactivation on this engine, nor variable valve timing. It does have staged intake runners, but other than that it's a plain Jane port injected transverse v6.


1985 F-250HD 7.5L 4x4 135k- Castrol GTX 15w-40 HDEO
04 Odyssey EX 182k PUP 0w-40
96 Maxima GLE 250k QS Defy 5w-30
07 Chrysler Pacifica Limited 129k Chevron Supreme 5w-20
Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4807947
07/07/18 07:45 PM
07/07/18 07:45 PM
Joined: Mar 2017
Posts: 674
West Ma.
rollinpete Offline
rollinpete  Offline
Joined: Mar 2017
Posts: 674
West Ma.
Looks clean.
Nice picks. smile


Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive185k miles
Last Change;
50/50 QSUD, QSHM. 5w30
Fram XG8A, Fram CA8141

Currently under the influence of oil shocked2

Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4807949
07/07/18 07:49 PM
07/07/18 07:49 PM
Joined: Dec 2017
Posts: 1,302
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,302
US
thumbsup Looks good to go another 130k--


I'm a thickie; assimilate
But 20s have their place

Using AMSOIL

Hers: 2008 Jeep Liberty 138k, SS 5w30/Amsoil

His: 2015 4Runner 41k, OE 5w30/Wix

Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4807980
07/07/18 08:41 PM
07/07/18 08:41 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
Not bad looking good, a tad varnished from extra heat behind the engine. It'll go another 100,000+


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: JLTD] #4807984
07/07/18 08:43 PM
07/07/18 08:43 PM
Joined: Mar 2015
Posts: 5,393
Virginia
bbhero Offline
bbhero  Offline
Joined: Mar 2015
Posts: 5,393
Virginia
^^^^^^^

I agree. Looks like another 130k or more is very possible.


Nissan Altima 3.5 Coupe
Mobil Super 5w30 Wix 57356
"Treat your family like your friends and treat your friends like your family."
Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4807994
07/07/18 09:02 PM
07/07/18 09:02 PM
Joined: May 2012
Posts: 1,823
The land of USA-made Subies!
SubieRubyRoo Online happy
SubieRubyRoo  Online Happy
Joined: May 2012
Posts: 1,823
The land of USA-made Subies!
Front looks brand new, rear not bad at all.

Those rocker arms would live with 1500+# of open pressure, no clue why those are so massive. I'm no ChryCo fan, but that engine looks pretty clean. Credit to Valvoline! smile

Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4808001
07/07/18 09:27 PM
07/07/18 09:27 PM
Joined: Mar 2018
Posts: 142
Hammehead Offline
Hammehead  Offline
Joined: Mar 2018
Posts: 142
Is the pcv located at front bank only?


ToYota Corolla XEI 2010 1zzfe
Kawasaki Ninja ZX9R B4
Taurus GL Vulcan
Citroen C5 phase I
I used to use syn, now whatever is on sale and never had problems. This noob knows stuff.
Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4808084
07/08/18 02:38 AM
07/08/18 02:38 AM
Joined: Jan 2015
Posts: 757
missouri
ragtoplvr Offline
ragtoplvr  Offline
Joined: Jan 2015
Posts: 757
missouri
Usually the clean valve cover is where clean air enters the engine and the varnished valve cover has the PCV. Check for varnish sludge in PCV hose and buildup in intake and on intake valves. Probable only slight accumulation.


Rod

Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4808093
07/08/18 03:23 AM
07/08/18 03:23 AM
Joined: Jul 2005
Posts: 30,952
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,952
NY
Looks good, nothing to worry about there. Perfectly normal for the rear head of a transverse engine to look cleaner than the front. Continue what you're doing.


God Bless Our Troops

Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4808124
07/08/18 06:13 AM
07/08/18 06:13 AM
Joined: Feb 2011
Posts: 6,753
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,753
Hudson, NH
Is the pcv valve in the front or rear? It looks pretty good


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4808138
07/08/18 06:27 AM
07/08/18 06:27 AM
Joined: Jun 2005
Posts: 5,274
North Texas
ARB1977 Online content
ARB1977  Online Content
Joined: Jun 2005
Posts: 5,274
North Texas
Looks great


2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: Under Valve Cover Pics - 07 Pacifica 4.0L V6 [Re: 92saturnsl2] #4808204
07/08/18 08:10 AM
07/08/18 08:10 AM
Joined: Mar 2008
Posts: 6,126
Michigan
ZZman Offline
ZZman  Offline
Joined: Mar 2008
Posts: 6,126
Michigan
Nice pics. Looks good


2003 Mercury Grand Marquis. PP HM 5w-30 and Fram Ultra
2008 Sebring Hardtop convertible. PP HM 5w-30 and Fram Ultra
2006 Kawasaki Vulcan 900 LT. Motul 7100 10w-40 and K&N
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