TECH TIPS

SEEK THE SOURCE

A weak or cracked valve return spring may cause an annoying tapping or clicking sound, especially on L-head type engines — even if the valve lash is correct. To easily locate the defective spring (or springs), remove the valve cover. With the engine warm and idling, insert a flat-blade screwdriver into each spring, one at a time. The tapping sound will stop when you’ve found the weak or cracked spring.

FLOATING HMMWVs?

Can the Army HMMWV float in water?

No. Neither can Navy, Marine Corps, or Air Force HMMWVs, though