4.7 Oil Seepage or Leak - TundraTalk.net - Toyota Tundra Discussion Forum
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post #1 of 7 (permalink) Old 02-08-2017, 11:14 PM Thread Starter
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4.7 Oil Seepage or Leak

Hi everyone

I am getting prepared to replace the timing belt on my 2006 Tundra Double Cab very soon. I was checking out the engine and I noticed some oil behind the timing covers. Would this be a possible cam seal leak or valve cover leak? The following pictures show the leak on both the drivers side, and the passengers side near the power steering pump. I wanted to make sure I have all the correct parts on hand before I tackle this job. I am a weekend mechanic, but have sucessfuly changed a timing belt on an 2004 Acura MDX. Thanks for you help with this!







When changing the timing belt, I was planning on replacing the timing belt, tensioner, pulleys, water pump, thermostat, radiator upper and lower hoses, as replace the coolant. I was also planning on changing spark plugs. Did I miss anything?

Thanks!
Nathan
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post #2 of 7 (permalink) Old 02-08-2017, 11:27 PM
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Looks like a light seep.

Can't really say I would worry about it, not wet, not dripping.


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post #3 of 7 (permalink) Old 02-08-2017, 11:38 PM Thread Starter
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Thanks Powertechn2!

Do you think I need to have the cam seals on hand when I tackle the timing belt, or do you think it is coming from the valve cover?
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post #4 of 7 (permalink) Old 02-09-2017, 12:21 AM
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I have never been into a 4.7. So I can't honestly say.

But in general, the way I look at things is like this.

A. Try to have everything you might possibly need on hand.

B. Try to have everything you shouldn't need on hand.

C. Fix everything you can while you are almost all the way there as you are almost all the way there.


Only exception is crazy ladies.

There is no fixing everything, just do what you can, and deal with the rest later...


Sorry, it is a moonshine night. But other than the exception, all else is true. And even the exception, just it doesn't apply here.


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I put the Laughter in Slaughter, and the Fun in funeral.
KTM 450xc QUAD, Baldwin head, Ti valves, 8/06 cam, motoworks, goldspeed tires...
Gone/not forgotten: 2010 CM RW that was sweet,
NOW: 2017 Platinum. Tinted, trd duals, Exo Grapplers. Led h-lights and interior, Hard hat tonneau, line-x, Rancho uca/level'd
I like weapons. I dont capitalize, use spell check, or punctuate properly...
and you can call me Power.
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post #5 of 7 (permalink) Old 02-09-2017, 12:24 AM
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post #6 of 7 (permalink) Old 02-09-2017, 10:52 AM Thread Starter
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Quote:
Originally Posted by Powertechn2 View Post
I have never been into a 4.7. So I can't honestly say.

But in general, the way I look at things is like this.

A. Try to have everything you might possibly need on hand.

B. Try to have everything you shouldn't need on hand.

C. Fix everything you can while you are almost all the way there as you are almost all the way there.


Only exception is crazy ladies.

There is no fixing everything, just do what you can, and deal with the rest later...


Sorry, it is a moonshine night. But other than the exception, all else is true. And even the exception, just it doesn't apply here.
Bahahaha

Thanks, I will keep that in mind. I guess I better order the cam seals, crank seals, and valve cover gaskets just in case. If anyone has any experience with the 4.7, please keep me posted.
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post #7 of 7 (permalink) Old 02-28-2017, 11:49 AM
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Ive got the same seepage on the driver side and I cant really tell from your passenger side photo but ive got a little leak there as well. I just replaced the passenger side valve cover gasket and that seems to have stopped the small leak I could see dripping from the valve cover but I also think the cam seals are leaking on mine and yours.

I dont think you would see the oil residue on the bottom of the timing cover if it were a valve cover leak. Due to driving, oil tends to migrate towards the cab because of air blowing through. I dont think you would see the oil migrating forward with a valve cover leak.

My water pump is leaking so it looks like its time to tear it down and find out. How many miles do you have on your truck? Im at 260k, so leaking cam seals doesnt seem out of the ordinary.

2005 DC 4x4
Fox 2.5's front/ 2.0 rear
TC UCA
Falken AT3 265/75/16
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