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Thread: Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic

  1. #1
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    Post Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic

    Today i was free & decided to tune my car myself. Apart from all the minor jobs which i do myself i never did a valve clearance adjustment which our mechanics call tuning. of course i have Factory Service Manuals for my car.

    The 1st few pics r of my ride, all other pics & writing is from another website. So the credit goes to the original writer.
    The results were to my satisfaction i.e. reduced engine sound & smoother drive.

    I want to demystify the mysterious TUNING which mechanics do on our cars....

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - irfan44 albums sensorcleaning picture5328 23092011005

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - irfan44 albums d15b picture4038 20052011015

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - irfan44 albums d15b picture4039 20052011016

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - irfan44 albums d15b picture4040 20052011017

    HERE GOES THE PRACTICAL


    Honda Civic SOHC Valve Adjustment

    <hr style="color:#FFFFFF" size="1"> How to perform a valve lash (clearance) adjustment on a SOHC Honda Civic, namely a 90-00 D-series and possibly others. These pics are of an OBD2 D-series.

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - valve cover
    Your engine may not have the cbr coil packs.

    Why
    When your valves need to be adjusted some of the symptoms can be excessive valve train noise, smog fail HC, a small drop in performance, driveability, and fuel economy. If your valve lash is too tight it can cause you to wear down the cam resulting in a costly repair (not to mention lots of metal shavings circulating through your engine).

    Maintenance Schedule
    According to the manual, you should adjust the valves every 12 months or 15,000 miles. You will also need to perform a valve adjustment if you loosen the head bolts for any reason (ie mini-me or headgasket change), change the cam, or disassemble the valvetrain.

    Parts/Supplies
    Liquid Gasket ie Honda Bond
    Possibly a Valve Cover Gasket Kit
    Brake Cleaner
    Rags

    Tools (Req'd)
    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - tools
    Feeler Gauges .007in(0.18 mm), .008 in(0.20 mm), .009 in(0.22 mm) . 010 (This includes the EXi and most other D-series, but other models may vary so check your specs)
    10mm Jam Nut Valve Adjustment Tool (10mm wrench key)

    For the feeler gauges are available in Rs 200 from any hardware store.

    Tools
    These are the tools I used:
    Jack
    Jack Stand
    Wheel Chock
    Impact
    Ratchets 1/4, 3/8, 1/2 inch drive
    Sockets 10mm short 1/4 drive, 10mm 3/8 drive, 19mm 1/2 drive, spark plug socket (small)
    Long Extensions, 3/8 & 1/2 drive
    Flat Blade Screwdriver
    Socket adapter
    Sharpee

    Torque Specs
    Wheel Lug Nuts 80ft/lbs
    Valve Cover Bolts 84inch/lbs
    Spark Plugs 156inch/lbs
    Valve Lock Nuts 13ft/lbs

    Procedure
    The engine must be stone cold. Let the car sit overnight. Note - you can't do a valve adjustment on a head before you install it on the block because torquing it down will change the thickness of the head.


    Lift the Car
    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - jacked up

    Pull the hand brake, put the car in 4th gear, chock a rear wheel, jack up the front end, put a jackstand under the driver's front jack point, let the car down, pop the hood.

    Remove the spark plugs
    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - remove spark plugs
    Pull the spark plug wires out of the valve cover and set them aside (mark them with a sharpee, one closest to crank pulley is #1). Removing the spark plugs makes it much easier to rotate the engine by hand.

    Remove Valve Cover
    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - remove breather
    Remove the air breather hose from the valve cover.

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - remove ground
    Remove the core support ground wire from the valve cover.

    Remove the bolts holding down the valve cover and gently pry it up at a point that isn't critical to sealing or tap it with a rubber mallet.

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - remove bolts

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - valve cover off

    Remove the 10mm bolts holding the upper timing belt cover and remove it.

    Find TDC

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - UP
    Your engine may not have the dual VTEC solenoids.

    Make sure the car is in 4th gear and crank the engine by rotating the left front wheel counterclockwise until the "UP" mark in the cam is pointing straight up indicating cylinder 1 is at tdc on its compression stroke. Watch the rocker arms as you rotate the engine. They must be completely at rest when you adjust the valve clearance. All the valves for a particular cylinder will be at rest when that cylinder is at tdc on the compression stroke.

    Cylinder #1 Valve Clearance
    Check the valve clearance on cylinder 1 (closest to crank pulley). Use your .007 feeler gauge on the intake side and the .009 on the exhaust side.

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - pull feeler gauge
    The .007 should slide in with a slight drag on the intake side. But the .008 should not be able to fit. If it does, insert the .007, loosen the lock nut with the jam nut tool and turn the screw gently using two fingers. When you feel it contact the feeler gauge, gently pull back on the gauge. It should be locked in place. Loosen the screw just a hair until you can barely free the gauge (it should drag). Be careful not to press down on it with the jam nut tool. Now try inserting the .008 again. It should not fit (don't force it).

    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - adjusting in valve
    Repeat this using the .009 and .010 on the exhaust side.

    Cylinder #3 Valve Clearance
    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - 3 tdc
    Next is #3. The firing order is 1, 3, 4, 2. Turn the crank pulley until the cam pulley turns 90 degrees counterclockwise. The "UP" etch mark will face the front of the vehicle. Check/adjust the valves.

    Cylinder #4 Valve Clearance
    Next is #4. The "UP" etch mark will face downward. Check/adjust the valves.

    Cylinder #2 Valve Clearance
    Next is #2. The "UP" etch mark will face the rear of the vehicle. Check/adjust the valves.

    Double Check
    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - re check
    Go through the cycle a few times until you are comfortable that each valve is consistent. Then torque the lock nuts and check it one last time.

    Reinstall the Valve Cover
    Clean the gasket mating surface. Put the upper timing belt cover in place. Put the valve cover gasket into the valve cover and apply the liquid gasket at the sharp corners where the distributor and cam pass through the valve cover. Press the valve cover in place and install the bolts in a swirl pattern starting in the center. First torque them by hand and then with the torque wrench according to the spec. If you over tighten these bolts they break very easily.

    Re-install Spark Plugs
    Home Tuning/ Valve Clearance /Plug Indexing my 6th gen Civic - index plugs

    Indexing the Plugs
    Make sure that plug gaps are set to 1.0mm-1.1mm.
    Mark the open side of the plug face & refit them trying that the ground strap doesn't face the intake ports.

    The rest of the installation procedure is the reverse of removal.

    Reset the ECU
    On most Civics you simply unplug the battery or remove the 7.5A fuse under the hood for 10 seconds.

    Test Drive the Vehicle
    Don't wait until Monday morning to find out if you did something wrong! Make sure no oil is leaking from the valve cover and that there's no excessive valve train noise or other obvious problem.

    In most cases you'll notice the car is more peppy, the idle is smoother, and you'll pick up some mpg.

    U R FREE TO ASK ANY QUESTION


  2. #2
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    hmmm....i think i m the last person driving a 6th gen these days.

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    A very good and useful DIY !

    It's not a very tough job, saves money, no need to go the workshop for such minor adjustments, I'd say a job well done
    City SX8 - Civic ES - Accord SiR CF4 F20B
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    thnx dear

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    a very easy job on old Ds but toughest jod on new Ds Ls n R18.
    iv tried twice on my D n it took 3h-4hours non stop.openin the valve job is hell of a job n then valve clearance wth blindfolded eyes OMG as opening cam gear cover is not possible atleast for as it got strange located nuts
    DIY The Best Workshop on the Holy Planet!
    Every thing changes,Its only the "change" which never changes.

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    very useful thread this is what a real tuneup is but people here on pakwheels are busy getting LASER IRADIUM for PARFARMANCE so expect less of a crowd here

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    Quote Originally Posted by wasay_ahmed View Post
    a very easy job on old Ds but toughest jod on new Ds Ls n R18.
    iv tried twice on my D n it took 3h-4hours non stop.openin the valve job is hell of a job n then valve clearance wth blindfolded eyes OMG as opening cam gear cover is not possible atleast for as it got strange located nuts
    u need to make sure the engine is cold before trying the above+u dont open the valve u just find the top dead center loosen the valve bolts (intake and exhaust accordingly)and adjust the valve/tappet d15bs should be tuned with a 0.007-0.009 feeler guage and exahust should be aroun 0.009-0.011 but then again some people may disagree Hot/cold you can't just get the best f both worlds

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    Quote Originally Posted by TeamAMS1 View Post
    u need to make sure the engine is cold before trying the above+u dont open the valve u just find the top dead center loosen the valve bolts (intake and exhaust accordingly)and adjust the valve/tappet d15bs should be tuned with a 0.007-0.009 feeler guage and exahust should be aroun 0.009-0.011 but then again some people may disagree Hot/cold you can't just get the best f both worlds
    Agree wth ya n it definately helps alot.
    bro im talking abt Honda d16w9 d17 etc n L12-15 R18a its not easy to perform valve clearance of these engines.
    for Laser Iridiums u should be happy as u will find less people wth stalled cars on road
    DIY The Best Workshop on the Holy Planet!
    Every thing changes,Its only the "change" which never changes.

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    Quote Originally Posted by TeamAMS1 View Post
    very useful thread this is what a real tuneup is but people here on pakwheels are busy getting LASER IRADIUM for PARFARMANCE so expect less of a crowd here
    ya i feel the same. people think they can get 200 bhp from their 130 bhp motor by installing IRRADIUMS......

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