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Old 04-09-2011, 06:58 PM   Thread Starter #1
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Default Valve Adjustment?

has anyone done an valve or lifter adjustment on there cars?
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Old 04-09-2011, 10:08 PM   #2
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Default Re: Valve Adjustment?

Hydraulic lifters don't need to be adjusted.
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Old 09-11-2012, 10:28 PM   #3
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Default Re: Valve Adjustment?

I think i am hearing what sounds like the valves. I am clueless in this area but my engine seems to idle louder than a good running engine should. What could be causing this besides the timing chain? Oil level is good and i did the chain job a year ago. A few months ago a mechanic told me that these engines tend to idle like this but i was not convinced.
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Old 09-11-2012, 11:04 PM   #4
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Default Re: Valve Adjustment?

Originally Posted by trilla_one View Post
I think i am hearing what sounds like the valves. I am clueless in this area but my engine seems to idle louder than a good running engine should. What could be causing this besides the timing chain? Oil level is good and i did the chain job a year ago. A few months ago a mechanic told me that these engines tend to idle like this but i was not convinced.
The vq35 definitely has a bit more valvetrain noise then the vq30. So in essence your mechanic is correct.

Now to answer your question. As your timing chain slack adjuster plastic wedges crack and you can hear your chain slacking, this puts a lot ef extra slopiness/unwanted strain in your valvetrain and causes premature wear. Not only on the valve guides but also the liters. Depending on how long you drove the Max with it rattling like that before you had the chain tensioners fixed......

Before you have your heads torndown for valvetrain specs....
The first thing you should if you suspect your Max is producing a lot more valve train noise is to have a oil pressure checked. If your oil pressure is low, combined with hydraulic components =valvetrain noise.

Oil Pressure @ idle = higher then 14Psi
Oil Pressure @ 2000 Rpm = 43 Psi
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Old 09-12-2012, 06:10 AM   #5
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Default Re: Valve Adjustment?

Originally Posted by BurntOrangeAppeal View Post
The vq35 definitely has a bit more valvetrain noise then the vq30. So in essence your mechanic is correct.

Now to answer your question. As your timing chain slack adjuster plastic wedges crack and you can hear your chain slacking, this puts a lot ef extra slopiness/unwanted strain in your valvetrain and causes premature wear. Not only on the valve guides but also the liters. Depending on how long you drove the Max with it rattling like that before you had the chain tensioners fixed......

Before you have your heads torndown for valvetrain specs....
The first thing you should if you suspect your Max is producing a lot more valve train noise is to have a oil pressure checked. If your oil pressure is low, combined with hydraulic components =valvetrain noise.

Oil Pressure @ idle = higher then 14Psi
Oil Pressure @ 2000 Rpm = 43 Psi
Thanks. When i purchased the car the rattling was already there so not sure how long it was running like that. I will have the oil pressure checked next then. Any idea how much the dealer charges for the valvetrain specs job? Dont think i would trust a job like this to a mom and pop if it turns out i need to have this done
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Old 09-12-2012, 07:26 AM   #6
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Default Re: Valve Adjustment?

Originally Posted by trilla_one View Post
Thanks. When i purchased the car the rattling was already there so not sure how long it was running like that. I will have the oil pressure checked next then. Any idea how much the dealer charges for the valvetrain specs job? Dont think i would trust a job like this to a mom and pop if it turns out i need to have this done
Did you say the "dealer"....lol. No idea how much. If the dealer goes by the book, the job of removing and replacing both cylinder heads calls 20.6 Hours....
I can not answer your question whether you can trust your parents with this repair. That is for you to judge best.
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Old 09-12-2012, 07:31 AM   #7
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Default Re: Valve Adjustment?

he didn't mean his parent he means a local repair shop
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Old 09-12-2012, 07:43 AM   #8
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Default Re: Valve Adjustment?

Originally Posted by 06BlckMax View Post
he didn't mean his parent he means a local repair shop
Thanks for clearing that up :thumbup: I was raising an eyebrow couple times reading OP post...my bad

Since the dealer will take off heads to get them specd. They will most likely conclude you need new cylinder heads(even if you don't)...and bend you for another gazillion dollars for heads and other added but (needed) expenses.
Your best bet here is to just drive the car while looking for a low mileage 08 motor....then instead of replacing heads or valvetrain components on your slightly tired engine (bypass surgery), you use the money for a heart transplant
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Old 09-12-2012, 09:50 AM   #9
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Default Re: Valve Adjustment?

Originally Posted by 06BlckMax View Post
he didn't mean his parent he means a local repair shop
lol yeah

Originally Posted by BurntOrangeAppeal View Post
Thanks for clearing that up :thumbup: I was raising an eyebrow couple times reading OP post...my bad

Since the dealer will take off heads to get them specd. They will most likely conclude you need new cylinder heads(even if you don't)...and bend you for another gazillion dollars for heads and other added but (needed) expenses.
Your best bet here is to just drive the car while looking for a low mileage 08 motor....then instead of replacing heads or valvetrain components on your slightly tired engine (bypass surgery), you use the money for a heart transplant
that makes sense
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