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Old 03-25-2010, 06:37 PM   #1
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valve adjustment

Does anyone know when we need to do the valve adjustment on out trucks? I have 84k on mine and i get a lot of vavle noise so im thinking it might be time.
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Old 03-25-2010, 06:42 PM   #2
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Old 03-25-2010, 06:48 PM   #3
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I was told that they should go 250K miles before they need an adjustment.
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Old 03-25-2010, 07:02 PM   #4
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Quote:
Originally Posted by chris4x4 View Post
I was told that they should go 250K miles before they need an adjustment.
Awesome, it must just be a figment of my imagination then.
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Old 03-25-2010, 07:15 PM   #5
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Quote:
Originally Posted by chris4x4 View Post
I was told that they should go 250K miles before they need an adjustment.
In other words, the truck will have been bought back by Toyota due to frame rust before a valve adjustment is needed.
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Old 03-25-2010, 07:38 PM   #6
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OCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shedOCTaco is one of the sharper tools in the shed
 
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Quote:
Originally Posted by Bandit View Post
i thought mine needed it too... making a ticking kinda noise... then i found out it was a tsb for a gasket on my exhaust... i think the gasket around the o2 sensor... that was 65,000 miles ago... still running strong.
Awesome. Do you know what gasket it is? Or where i can find that tsb? I need to get my shit fixed ASAP. I really fell like i lose powere when i hear that ticking shit.
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Old 03-25-2010, 07:42 PM   #7
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Quote:
Originally Posted by WilsonTheDog View Post
In other words, the truck will have been bought back by Toyota due to frame rust before a valve adjustment is needed.
i'd be down of a rust buy back
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Old 03-25-2010, 07:43 PM   #8
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Quote:
Originally Posted by WilsonTheDog View Post
In other words, the truck will have been bought back by Toyota due to frame rust before a valve adjustment is needed.
How do i go about doing this?
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Old 03-25-2010, 07:51 PM   #9
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Quote:
Originally Posted by OCTaco View Post
How do i go about doing this?
What you do is, drive your truck for 8 years and hope that you and many others have rust problems. Then, Toyota buys your truck back for 150% of it's value. See, it's like an investment with a great return.
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Old 03-25-2010, 07:57 PM   #10
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Quote:
Originally Posted by WilsonTheDog View Post
What you do is, drive your truck for 8 years and hope that you and many others have rust problems. Then, Toyota buys your truck back for 150% of it's value. See, it's like an investment with a great return.
Loving it. Although it does not fix my current problem.
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Old 03-25-2010, 08:03 PM   #11
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All I can say about that is to bring it in and have it looked at.
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Old 03-25-2010, 10:44 PM   #12
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Try higher octane fuel next fill-up. If ticking changes or disappears, there's the problem, and short of major engineering, no real easy fix.
Valve adjust--Aren't these double overhead cams? Therefore, no rocker arms, i.e. no adjustment? You have me wondering, hmm.
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Old 03-25-2010, 10:49 PM   #13
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Quote:
Originally Posted by RogerGene View Post
Try higher octane fuel next fill-up. If ticking changes or disappears, there's the problem, and short of major engineering, no real easy fix.
Valve adjust--Aren't these double overhead cams? Therefore, no rocker arms, i.e. no adjustment? You have me wondering, hmm.
I'm gonna be honest with you guys, im not a guru when it comes to these trucks. I just know the real basics. And I always use shell Vpower which is 91 octane. Funny thing, when i called toyota to ask about the valve adjustment they said,"at 60k or when they get too loud." Why would the say that if they need no adjustment?
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Old 03-26-2010, 06:43 AM   #14
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The valve train is a direct acting mechanical bucket (DAMB) valve train. It does not have a hydraulic lash adjuster. They eventually need to be adjusted. They very the shickness of buckets or shims under the buckets. Very simple and stiff valve train, kinda noisy though....
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Old 03-26-2010, 10:26 PM   #15
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Thanks, "dalsmthme", most of my wrenching is from older tech engines. I'll be thinking about an adjustment soon.
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Old 03-27-2010, 12:28 AM   #16
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Quote:
Originally Posted by chris4x4 View Post
I was told that they should go 250K miles before they need an adjustment.
What about on the 5vz?
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Old 03-27-2010, 07:24 AM   #17
With sufficient thrust, pigs fly just fine.
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Quote:
Originally Posted by SkyHighTacoma View Post
What about on the 5vz?
Im not sure what its interval is. Its the same Shim under bucket system though....
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Old 03-27-2010, 12:08 PM   #18
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Quote:
Originally Posted by chris4x4 View Post
Im not sure what its interval is. Its the same Shim under bucket system though....
Yea, I knew it was a shim under bucket. Even though I dont understand the benefit of a "shim under bucket" lol.
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Old 03-27-2010, 12:16 PM   #19
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Quote:
Originally Posted by SkyHighTacoma View Post
Yea, I knew it was a shim under bucket. Even though I dont understand the benefit of a "shim under bucket" lol.
I believe the shim under bucket design holds its adjustment better and longer. Im not sure though.
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Old 03-27-2010, 02:58 PM   #20
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A direct acting mechanical bucket valve train is very strong and stiff. The valve train inertia is very low. They have a big advantage when designing combustion chambers specifically with valve angles. They are simple and robust but require adjustment intervals and tend to be noisy.
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