It's been over a year since we warned about millions of faulty Chinese-made tire valve stems, yet every week we get comments from readers about flat tires and blowouts caused by defective stems. "Two ...

ROCHESTER HILLS, Mich. (June 19, 2001)—Like Rodney Dangerfield, the lowly tire valve stem just doesn't seem to get any respect. It's a piece of hardware that is usually taken for granted and readily ...

AThe oil consumption problem is most likely caused by excessively worn valve guides and/or leaking valve stem seals. Is the valve stem-to-guide clearance within spec (.0015-.0035, intake; .0015-.0032, ...