Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

Valve Adjustment Benefits

Old 25-Aug-2003, 03:58 PM
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Smile Valve Adjustment Benefits

Hi guys, I'm wondering if anybody has done a valve adjustment recently. If so, I'd be interested to know if you could notice any kind of performance increase from the job (gas milage, engine smoothness, hp increase?). I haven't done one since I got my car used at the end of last year. It's a 1998 Civic Si and it's got almost 190,000 km on it, but it's running quite well. I'm wondering if it is worth the money to do the adjustment.

Your input would be much appreciated. Thanks!
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Old 25-Aug-2003, 04:22 PM
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Ya, I just did mine this past weekend. I put a new valve cover gasket and spark plug well seals in as well. It's a fun job... Noise levels reduced, no chance of valves burning up - all definite benefits.

EZ to do, pop the cover, pull the plugs, rotate engine counter clockwise to 1st cyl TDC. 1st cyl is the one on the dr side of the engine, farthest from the distributor. When UP mark on cam spocket is pointed up, and the white mark on the pulley is lined up with the timing mark, you are at 1st cyl TDC. Adjust valves of 1st cyl, 0.20mm intake, 0.25mm exhaust. Rotate engine counter clockwise to when the UP mark on the sprocket is horizontal and to the left (front of car), then adjust the valves of #3 cylinder, then rotate the engine till the UP on the sprocket is pointed directly down, then adjust #4 cylinder. Rotate the engine again till UP is pointed to the rear of the vehicle, and adjust #2 cyl. Put it all back together with new gaskets, use Permatex Ultra Gray for the corners around the cam bearings... start up and enjoy!
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Old 25-Aug-2003, 04:34 PM
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Wow Bruno, you sure made it sound so simple! I think I would be more conservative on a big job like this and take it to a mechanic for it. What do you think? Too bad you've done it already, or else I would ask you to let me come over and watch you do it.

Speaking of mechanics, do you know of any good ones in the Scarborough / Markham area that don't charge an unreasonable amount, but do a good and reliable job? Thanks!
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Old 25-Aug-2003, 04:37 PM
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Originally posted by j9chan
Wow Bruno, you sure made it sound so simple! I think I would be more conservative on a big job like this and take it to a mechanic for it. What do you think? Too bad you've done it already, or else I would ask you to let me come over and watch you do it.

Speaking of mechanics, do you know of any good ones in the Scarborough / Markham area that don't charge an unreasonable amount, but do a good and reliable job? Thanks!
PM Buddha
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Old 25-Aug-2003, 04:39 PM
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Buddah does valve adjustments for some folks around here, but I don't know where his shop is... I live in Windsor He's a good mechanic from what I can tell.

It really is that simple though. You need a 10 mm socket and box-end wrech, spark plug socket, 17 mm socket to rotate the engine... and a set of metric feeler gauges, and that's it! LOL for real, it's so easy. It would be good if you had someone there though to guide the process for you and help you out.
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Old 25-Aug-2003, 04:40 PM
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Originally posted by BOND007


PM Buddha

Shouldn't you be at the gym? C'mon... I can't be slackin on my pimpin
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Old 25-Aug-2003, 04:47 PM
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Originally posted by bbarbulo



Shouldn't you be at the gym? C'mon... I can't be slackin on my pimpin
Day off today ....
did abs yesterday morning for over an hour. Gots to keep the pimp hand strong

Start again tomorrow
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Old 25-Aug-2003, 04:50 PM
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mah pimp hand is way strong, thats how I keep my stable clean

I drive a Cadiallac, wear a perm cuz I'm a G
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Old 25-Aug-2003, 04:51 PM
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Originally posted by bbarbulo
mah pimp hand is way strong, thats how I keep my stable clean

I drive a Cadiallac, wear a perm cuz I'm a G
Good thing I carry the Magic Stick
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Old 25-Aug-2003, 08:20 PM
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How much do mechanics charge to do Valve Adjustments?
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Old 25-Aug-2003, 08:29 PM
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PM Buddah.... I'm sure it's not too much.....
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Old 26-Aug-2003, 10:11 AM
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Honda charges a couple hundred bucks I hear, but I'm not sure.
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Old 26-Aug-2003, 10:21 AM
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They charge $75 for labor alone and more if they throw in a new gasket...
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Old 26-Aug-2003, 10:37 AM
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I would suggest a PM to BUDDHA ......again
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Old 26-Aug-2003, 10:50 AM
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honda charges $110 for it... or last i checked thats what it was
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Old 26-Aug-2003, 09:56 PM
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By the way guys, I heard somewhere that it is possible to gain some extra performance from the engine if you intentionally go 0.001 inch lower than the specs. Is there any truth to this? If so, what's the theory behind it?
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Old 27-Aug-2003, 06:46 AM
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That distance is almost impossible to measure using feeler gauges... there is a little but of experience that is needed to know what you are actually "feeling" for.
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Old 27-Aug-2003, 08:19 AM
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Yea honda does charge $110.
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Old 27-Aug-2003, 09:02 AM
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Originally posted by HAPPY
That distance is almost impossible to measure using feeler gauges... there is a little but of experience that is needed to know what you are actually "feeling" for.
slight drag is what you are "feeling" for

j9chan, the theory is that the valve will open sooner and further than it would otherwise, but this is a risky step for the inexperienced. Plus, you are not racing, so 1-2 hp you MAY gain from it is not worth the additional "risk". Honda set it at 20 and 25 for a reason.
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Old 27-Aug-2003, 09:11 AM
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Thanks Bruno!
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