Lexus ES330 Valve Cover Studs

infj23

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#1
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MAKE: Lexus
MODEL: ES330
YEAR: 2005
MILES: 320,000
ENGINE: V-6
DESCRIBE ISSUE.... I am going to replace the valve cover gasket on the front bank (closest to the bumper). It is leaking some oil out of the front of the valve cover. Question: do I have to remove the studs circled in yellow on the attached picture? If so, what wrench/device/socket do I use. It appears to be a female torx, but it is really small. Thanks!
Doc
 

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#2
The front two do not have to be removed. Not sure about the back two... but if there are several "regular" bolts back there, that may be a clue, if your consider the spacing and compare it to the front "regular" bolts.
 

infj23

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#3
Thanks, Dan. I could not tell if those studs are attached to the valve cover or passed through it like the other bolts. I'm going to guess that the ones in the rear are like the ones in the front, so I'll work with the "regular" bolts. Should be a pretty easy job.
 

infj23

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#4
Update!
Job successfully completed. In the picture I attached to my initial post, the studs up front are not removed, but the two in the rear are, only because they hold a wiring harness in place. They do not hold the valve cover in place.
Attached are 4 more pictures: the cam shaft, the inside of the valve cover, and 2 spark plug views.
Impressions?
For having 322K miles, I'm thinking the insides look pretty good.
I have no idea how many miles on the spark plugs, but one looks not as good as the others. Time to change the plugs? That's easy for the front 3 and a pain for the rear 3, but I can do it.
Thanks to all!
Doc
20170205_124516.jpg 20170205_124520.jpg 20170205_145755.jpg 20170205_150146.jpg 20170205_124516.jpg 20170205_124520.jpg 20170205_145755.jpg 20170205_150146.jpg 20170205_124516.jpg 20170205_124520.jpg 20170205_145755.jpg 20170205_150146.jpg
 

nickb2

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#5
Impressions??

Those spark plugs are cooked for sure. Don't fool with that, if you had time to remove them and take a picture, don't fuss, put new ones in for sure, cuz at the look of the plug, just a lack of maintenance.

As for the other pictures of the inside/innards of the engine, it does look ok for the high mileage, but maybe an engine flush is in order. I just feel the oil with my hands and if it feels like carbon build up/sand paper, crank and cam won't last long.

The inside of that valve cover needs to be cleaned the best you can, cuz the residual carbon deposits will just come back to haunt you.

The cams look fine, I see . They have a nice mirror finish.
 
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#6
That is a good example of how better tolerances and engineering and oils have improved in the last 50 -70 years. That engine looks like what we used to see on 1940-50 engines with only 32,ooo miles instead of your 320,000.
 

nickb2

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#7
That is a good example of how better tolerances and engineering and oils have improved in the last 50 -70 years. That engine looks like what we used to see on 1940-50 engines with only 32,ooo miles instead of your 320,000.
As for this comment, 100% in agreement.

We have come a long way.

;)
 
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#8
Each one of the "round gaskets" are held in place by both friction and two hard-to-see tabs. You need a small screwdriver and "sharp" pliers to bend the tabs out of the way before removing gaskets. Bend them back down once new gaskets are in place.