Valve springs

Part of S58 engine · about $380 to replace

What it is

24 single conical springs.

What it does

Close the valves and keep the follower on the cam at 7,200 rpm.

How it fails

Spring fatigue lets the valves float; rare below 200,000 km.

Material	Chrome-silicon spring steel
Spec	Seat load 280 N
	open 650 N

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