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Re: Valve Clearances inlet and exhaust
J24b engine D.O.H.C. U.S.A? open hood , look up. see white sticker, see clearances.? off online F.S.M Valve clearance specification when cold : 59 to 77deg F or 15 to 25deg C (engine temps) Intake: 0.0063 to 0.0094 inch (0.16 to 0.24mm) Exhaust: 0.0123to 0.0153 inch (0.31to 0.39mm) you must remove the bucket,tappet , to change lash. MIKE IT (that means a micrometer) then buy shims or new buckets to fit. (generic answer) the book says buy correct tappet after measuring, yours. and it's out of range, and doing the math first.
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valve clearances sohc 4g63 carb motor both hot and cold
Valve clearance - INLET mm: 0,15 hot
Valve clearance - EXHAUST mm: 0,25 hot
This engine is set hot if you are repairing the engine and have to do this cold
then set to 0.10mm INLET and 0.20mm EXHAUST
Then once hot readjust to specs
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
make the engine runs for about 30minutes before adjusting the valves, valve clearances: intake valve = 0.20mm(0.008 in) exhaust valve = 0.25mm(0.010 in) for reference only when the engine is cold, valve clearances: intake valve = 0.25mm(0.010 in) exhaust valve = 0.30mm(0.012 in) engine specs: mitsubishi 4g13 1.3L (if you have same engine)
This engine utilizes shims to set proper clearances, you will need a micrometer, valve clearance adjustment tool set for shimmed lifters,small magnetic arm, appropriate shim selecting charts (manufacturer will have this if you can get the nec. measurements).
Measure thickness of shims removed (using micrometer) and use this formula where T=Thickness of old shim; A=Valve clearance measured; N=Thickness of new shim required.
Intake valves: N = T + (A - 0.02 mm (0.008 in.))
Exh. valves: N = T + (A - 0.25 mm (0.010 in.))
Then you need to find shims as close as possible to the calculated values.
Valve clearances (cold) are as follows:
Intake0.15 - 0.25 mm (0.006 - 0.010 in.)
Exhaust0.20 - 0.30 mm (0.008 - 0.012 in.)
Note, if you are not familiar with precision measuring using a micrometer, this may be better left to a trained tech. These are high revving little power plants and you don't want a problem at 8K rpm.