What happens if Valve clearance is too small?
Too much or too little valve clearance can result in poor performance or a rough idle because the engine can’t “breathe” normally and operate at peak efficiency. If there’s too little valve clearance, the valves won’t fully close, causing excessive heat, and the engine will lose power.
At what position of valve must the valve clearance be measured?
Opinions may vary between piston and valve manufacturers, but a popular consensus is a minimum clearance of . 080-inch for the intake and . 100-inch for the exhaust. The exhaust valve expands more due to heat from combustion, and therefore needs additional clearance.
What happens when valves are to tight?
Driving Your Car With Valves Too Tight The other potential problem is for your valves to close too slowly, which reduces the compression in the cylinder. Driving with the valves too tight causes more damage. In severe cases, your engine may overheat and burn out a valve, which is a much more costly repair.
Can valve clearance cause no spark?
yes it can. usually when you adjust there loose.
Do valves tighten or loosen?
Generally, the valves will get tighter from the valve wearing into the head.
Does valve clearance affect starting?
Not maintaining proper valve clearance can result in not only lost of power of start up difficulties but also potential catastrophic engine failure or engine blows. With the constant revs of the engine, the valve clearances are reduced overtime in accordance to the wear of the valves and seats.
How often should you check valve clearance?
If you wait to check you valves when you have a problem then its too late, possible engine dammage. Check every 5000 miles or so. It should be part of the regular maintenance you do, just like oil changes. Depending on how much you ride it might be once a year or once every two years.
How does a feeler gauge work?
A feeler gauge is used to measure or set very small gaps, normally under 1 mm. When the blades are folded back into the handle, the thin, delicate blade are protected. The thickest possible blade that can be inserted into a gap or crack shows its width. Note: normally the blades are not hardened.
What are the two numbers on a feeler gauge?
Check the label on the side of the gauge to see if it’s listed in thousandths of an inch or hundredths of a millimeter. Usually, thousandths of an inch are listed with 3 numbers after a decimal point and hundredths of a millimeter have 2 numbers after a decimal point.
How do you read a feeler gauge?
To read the measurements of a feeler gauge, the user needs to take note of the numbers on the blade itself and whether the numbers are measured in hundredths of a millimeter or thousandths of an inch. For example, a marking on a feeler gauge of 0.040 indicates forty-thousandths of an inch thick.