Excessive valve clearance will cause a valve...

Question 1 / 270705eccefa1bacbc34ba4d476ca

Question 1 of 270705eccefa1bacbc34ba4d476ca

Excessive valve clearance will cause a valve to open __________.

Question 1 of 27070

Excessive valve clearance will cause a valve to open __________.

🔍 Key Concepts

• relationship between valve clearance (lash) and valve timing in a four-stroke engine • what happens to the cam follower/rocker arm movement when clearance increases • impact of excessive clearance on when the valve first starts to lift and when it finally seats

💭 Think About

• Visualize the cam lobe: if there is extra gap between the rocker/ tappet and valve stem, does the cam have to rotate more or less before it actually starts to move the valve? • Once the cam lobe is coming back down, with a bigger gap, will the valve stop moving (close) sooner or later compared to normal? • Compare this to zero clearance: which condition keeps the valve open the longest, and which keeps it open the shortest?

✅ Before You Answer

• Be clear whether more clearance = more delay or less delay before valve motion begins on the opening side • Decide whether the duration of valve open time gets longer or shorter with excessive clearance • Check that your choice has opening and closing behavior that both match the effect of a larger mechanical gap, not just one of them

Question 1 of 27070

Excessive valve clearance will cause a valve to open __________.

early and close early

early and close late

late and close early

late and close late