Well, I can see ur message has been here for quite some time. Most probably you got the answer to ur request.
I just did the valve clearance on the engine of my SJ413 that has the 1000cc engine of an SJ410 :
When cold: 0.13mm Intake and 0.18mm Exhaust
Engine sounded well and worked fine after that.
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With a special tool called a feeler gauge remove the valve covers and one by one bring the cylinders up to top dead center (both valves are fully closed at this point) adjust to factory spec. All adjustments are done cold. If engine is very high miles reduce the clearances in specs by slight amount (.002") to the tight side to account for wear in the valve train parts.
Adjust the valve tappets (yes, they 'tap') AKA Rockers or find out why the hydraulic self adjusting tappets don't work?
They transfer the downward motion of the cams on the camshaft to depress the valves. There is a thin clearance of about 8 thousandths of an inch with the engine cold. As the engine heats the clearance reduces. Over tightening causes the valve edges to burn, too much clearance causes tapping.
Manual tappets get quieter usually as the engine heats. Hydraulic tappets gets worse as the engine heats as the oil thins.
you haven't mentioned if it is a 4 cyl or not. However bring no 1 cylinder up to tdc and watch the tappets of the next cylinder to fire. when that cylinders rockers are in valve overlap situation ( exhaust starting to close and inlet starting to open) then that will be maximum clearance on no 1 cylinder and is when you set the tappets turning the engine until the next cylinder is at TDC watch for the next cylinder again to be in valve overlap and repeat as for no 1 cylinder
the valve timing on a motor is set and cannot be altered. The length of time that the valves are held open is determined by the lift of the cam and this period of time that the valves are held open determines how much mixture is allowed into the cylinder. If you advance the cam shaft you may gain extra mixture and a bit more power but on a single cam the exhaust valve timing is altered and so the advantage of the advance is lost. If you want more go from the motor get specially ground cam shafts ( hot cams) As to tappet clearance, if you have hydraulic lifters then they self adjust and thee is no clearance measurement. If you can adjust the tappets then most engines run .010" hot inlet and .012" exhaust hot Setting the tappets closer means that they open sooner but they also close sooner so the amount of mixture is reduced as the time for the mixture to enter the cylinder is reduced.
just mere thousanths the patrs store has specs on valve clearances..I assume its an overhead cam ..you can sometimes adjust while its in idle..run the tappets out until that cylinder misses.. then adjust back enough for it to run smooth..
Both the 2.0 liter 4-cylinder, and the 2.5 liter V6 are overhead cam engines. While all years of the V6 us hydraulic tappets, the 4-cylinder engines varied. From 1998 and earlier, they had hydraulic tappets. From 1999 on, they used shimmed mechanical tappets. Adjusting valve clearance on the later engines is a little involved, and, if you're not familiar with the procedure, it is perhaps best left to a professional mechanic who is familiar with the engine.
- Pull the hand brake and put transmission in neutral.
- Remove spark plug cords.
- Remove the spark plugs.
- Remove the Tappet cover
- Lift up the left front wheel. Cylinder number 1 is toward the pulleys and belts side.
- Rotate the crankshaft anticlockwise with socket and extension rod and bring the valve tappets (intake and exhaust) No. 4 cylinder on dancing position.
NOTE: THERE ARE OTHER WAYS ALSO TO ADJUST THE FOUR VALVES AT A TIME. BUT AS DIY FOLLOW THE FOLLOWING METHOD TO AVOID ANY CONFUSION.
- Adjust the valve clearance of number 1 cylinder. Valve clearance:
Intake 0.18 - 0.22 (cold) Exhaust 0.25 - 0.28 (cold) - Rotate the crankshaft anticlockwise to bring the valves of cylinder 2 on dancing position and adjust the valves of No. 3 cylinder.
- Similarly rotate the crankshaft to bring the valves of No. 1 cylinder on dancing position and adjust the valves of No. 4.
- Rotate the crankshaft anticlockwise to bring the valves of cylinder No. 3 on dancing position and adjust the valve clearance of No. 2 cylinder.
The tappet clearence should be in the owners handbook but it's a bit early a tappet noise from the engine (2006) ! Check oil level and change if it's overdue a service is definately worth a look ! Good luck
When setting tappets, it has to be born inind that the valve stem wears an indentation into the face of the rocker. This prevents a really accurate tappet adjustment, so the customer is right again. If you do not posess a tappet setting dial gauge, a normal engineers dial gauge will do just as well. The procedure is the same as using your feeler gauge except that you set the dial gauge up on the cylinder head with the pointer resting on the head of the rocker. Press down fairly firmly on the rocker valve end and zero the gauge. Next lift up on the rocker and read off the clearance, from the gauge, Use a magnetic base to support your gauge and repeat the pocedure for each valve pair.
make sure engine is warmed up. Put cylinder one at top dead center,remove the valve cover,loosen all adjustment lock nuts,adust intake and exhaust valves on cyl #1 and intake valve on #2 and exhaust valve on #3. now rotate crankshaft 360 degrees clockwise, now adjust intake valves on cyl#3 and cyl #4 and exhaust valves on cyl #2 and cyl #4.now tighten lock nuts and install valve cover. specs are intake valves 25mm clearance and exhaust 28mm clearance, use a feeler gauge,heres a picture to show you where to check clearance.