RE: valve adjustment - how necessary is it?
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RE: valve adjustment - how necessary is it? - 11/23/2005 3:36:53 PM
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tcodi
Posts: 8
Joined: 11/20/2005
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In response to a question of yours a few posts above:
Valves will have a slight bit of noise when cold because of the "lash" they are set to.
Valve lash is the clearance between the valve stem tip and the lifter, depends on the
engine but probably around .030 cold. This produces a noise when the engine is cold
because the lifters start moving before they contact the valves, so when they do they
give them a little smack. It makes a light pitter patter sound really fast like a bunch of
tapping.
Every engine needs cold lash because as it heats up the whole valve train grows. The valves
get a little longer, the cam gets a little fatter, etc. If the cold lash was set to zero you would
have valves sticking open when it was hot.
Setting lash is not hard, just intimidating if you've never done it because under the valve
cover on an dual cam engine it looks scary. It's really just a matter of getting some feeler
guages and tightening a bolt at the correct spot.
If it ain't giving you problems don't worry about it. The only possible effect of not re-adjusting
the valves on a high mileage engine is slightly less valve lift due to the wear on the cam and
follower. We're talking thousands of lift here. Maybe a horsepower or two at redline.
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RE: valve adjustment - how necessary is it? - 12/5/2005 1:44:58 AM
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deserthonda
Posts: 3575
Joined: 12/3/2005
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quote:
ORIGINAL: FlyLow
Local Honda dealer gave me an over the phone price of around $185 for the adjustment, said takes about 2 hrs. Should I do it?! So tempting  I was intrigued by a few people saying earlier, that better performance may be realized. Although I think my 99 LX is doing well, I get 28-30 mpg. Any thoughts?
your local dealer is full of POOP..$ 185 is way way too much,, a new gasket is around 11 dollars and delers charge 1 hr for valve adjustment so it depends on their hourly rate 70-80- dollars per hr ??
get an adjustment every 30k..money well spent ,
< Message edited by WheelBrokerAng -- 12/5/2005 3:56:55 PM >
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RE: valve adjustment - how necessary is it? - 5/27/2006 6:27:42 AM
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Sendal
Posts: 10
Joined: 5/27/2006
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I just wondering ... We need to ajust on cold or hot engine ? and how much the clearance ? in and out ?
thank you
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RE: valve adjustment - how necessary is it? - 5/27/2006 12:14:24 PM
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deserthonda
Posts: 3575
Joined: 12/3/2005
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quote:
ORIGINAL: Sendal
I just wondering ... We need to ajust on cold or hot engine ? and how much the clearance ? in and out ?
thank you
If you go to the DIY there is a HOW TO write up with step by step infos ..
_____________________________
No Year No Model in Your signature
No Help from me
Take a look in the DIY section before asking for help
Always Diagnose First,,, Before Replacing Parts
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RE: valve adjustment - how necessary is it? - 5/29/2006 1:42:53 PM
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YeuEmMaiMai
Posts: 1822
Joined: 5/28/2006
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Valve adjustment is always done on a cold engine. From Huey Honda in St louis it was $125 in June 05 total including a new gasket/tube seal set. and oil change and 10% discount since my car has over 100k on it.
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White 2002 Acura CL type S. 68K and change
Criminals thrive upon the intolerence of society''s understanding.....and political correctness
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RE: valve adjustment - how necessary is it? - 10/18/2006 7:17:54 PM
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accordfan222
Posts: 38
Joined: 10/15/2006
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Thank you all for providing good knowledge, this forum was good to learn about the car. I read the article for how to do the valve adjustment. Only thing I have confusion with was clearance in model year 94 to 97. service manual shows INTAKE 0.26mm(0.010in) plus or minus 0.02mm, and EXHAUST 0.30mm(0.012in) plus or minus 0.02 mm. which numbers are correct ????? I think DO IT YOURSELF shows lot smaller number than this.
quote:
ORIGINAL: deserthonda
quote:
ORIGINAL: Sendal
I just wondering ... We need to ajust on cold or hot engine ? and how much the clearance ? in and out ?
thank you
If you go to the DIY there is a HOW TO write up with step by step infos ..
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97 Accord SE Automatic 4dr
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RE: valve adjustment - how necessary is it? - 10/18/2006 7:47:36 PM
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sir_nasty
Posts: 6309
Joined: 2/23/2006
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if you've got the numbers from a service manual and it's the right manual then stick with them and you'll be fine
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1981 Honda CB650 Motorcylce - WHEE What More can I say?
2000 Lexus RX 300 - Oooh baby my wife let me drive it once!!
Quote: Life''''s great but it''''s not all beer and skittles
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RE: valve adjustment - how necessary is it? - 10/18/2006 9:54:56 PM
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deserthonda
Posts: 3575
Joined: 12/3/2005
Status: offline
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quote:
ORIGINAL: accordfan222
Thank you all for providing good knowledge, this forum was good to learn about the car. I read the article for how to do the valve adjustment. Only thing I have confusion with was clearance in model year 94 to 97. service manual shows INTAKE 0.26mm(0.010in) plus or minus 0.02mm, and EXHAUST 0.30mm(0.012in) plus or minus 0.02 mm. which numbers are correct ????? I think DO IT YOURSELF shows lot smaller number than this.
quote:
ORIGINAL: deserthonda
quote:
ORIGINAL: Sendal
I just wondering ... We need to ajust on cold or hot engine ? and how much the clearance ? in and out ?
thank you
If you go to the DIY there is a HOW TO write up with step by step infos ..
you are correct i went back and checked it out i should have said .010 and .012 inc instead of mm ..thanks for bringing it up,, i will change it
_____________________________
No Year No Model in Your signature
No Help from me
Take a look in the DIY section before asking for help
Always Diagnose First,,, Before Replacing Parts
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RE: valve adjustment - how necessary is it? - 10/19/2006 3:39:06 AM
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YeuEmMaiMai
Posts: 1822
Joined: 5/28/2006
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one thing to note that even if your valves are NOT making any noise the lash should be checked and adjusted at the intervil that honda states simply because if they are too tight, they will still wear without making any noise........Also some F series motors are just plain noisey due to excessive wear on valve train component that does not affect engine life.... just makes it noisey
_____________________________
Jesus is Salvation
White 2002 Acura CL type S. 68K and change
Criminals thrive upon the intolerence of society''s understanding.....and political correctness
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RE: valve adjustment - how necessary is it? - 10/21/2006 12:26:38 AM
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Slusher
Posts: 479
Joined: 9/2/2006
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I second what YeuEmMaiMai said. I have checked and adjusted my valves 3 times in 4 months because the valves seemed noisy. But everything is within spec and the valves are only really noisy when the engine is cold.
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95 EX Auto
OBX 4-2-1 Header
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