Want to know what the valve clearances are for my 1999 hyndai excel

sounds like the valve clearances are incorrect if your engine has got adjustable valve clearances check that 0.40mm inlet 0.50mm exhaust but the engine changed in 1999 to hydraulic valve lifters and when you refit origional folowers you should compress them to remove the old oil or the new refubished cyl head/valves will have no compression because the valves are not seating

Valve clearance Google search your year make and model valve clearance. Check the attached links,instruction and guides, Good luck
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Checking and adjusting valves
Engine Valve Adjustment Procedure The Right Way
Valve Clearance Adjustment
Valve clearance Google Search

need to know what type and engine you are asking about as not all engines use the same clearances.

between 80000 -100000 kl

DO YOU MEAN STEM TO GUIDE CLEARANCE.WHICH IS THE INTAKE VALVES IS 0.0015 - 0.0035. THE EXHAUST VALVES IS 0.0015 - 0.0032.

There is no valve adjustment for that engine, Hydraulic lifters, You might remove the valve cover and see if you have a rocker arm loose

there should be a tag on your engine with recomended valve clearances.

You adjusted the valves too tight. Back off of the adjustment before you break parts. You Have to set the rocker arm clearance when the engine is cold. (Not warm, not hot)

Use a feeler gauge.
The clearance for the Intake valves is .007 to .009. (7 to 9 thousandths)
The clearance for the Exhaust valves is .009 to .011 (9 to 11 thousandths)
You want a slight drag when you pull the feeler gauge through. This technique takes a certain amount of 'Feel'.

try www.diyrepairmanuals.com/hyundai.asp

Please use this link:

http://www.autozone.com/addVehicleId,1074701/initialAction,repairGuide/shopping/repairGuide.htm?pageId=0900c15280045c2a


Good luck....