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Auto Q&A with Tom Torbjornsen: What does DOHC stand for?

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Dear Tom,
Our Chrysler Sebring 2003 has a DOHC sign on the engine. Is there any way to know what this stands for? Thank you.
Gaby from Irondequoit, N.Y.

The acronym DOHC stands for Double Over Head Cam. Your engine has two camshafts, one for each set of valves per cylinder. Each camshaft controls the valve set on each side of the cylinder head.

Tom Torbjornsen is an automotive expert of 37 years. An automotive journalist in good standing with the IMPA (International Motor Press Association) and MPG (Motor Press Guild), Torbjornsen is the Repair and Maintenance Editor for AOL Autos, At Home Portals and many other websites. Please send your car questions to his website at