Honda Car Forum

Ttec · #1 (**permalink**) 06 Mar 2009, 10:16 pm

I want to know what is the difference between a single head and a dual head cam. can't seem to find any good pictures.

joe kickass · #2 (**permalink**) 06 Mar 2009, 10:31 pm

single over head cam means there is one cam operating both the intake and exhaust valves. dual means there is a cam running the intake valves and another cam running the exhaust. and for future reference.... try google image search

91PreludeSi · #3 (**permalink**) 06 Mar 2009, 10:46 pm

This is a picture of the SOHC motor (Civic). http://got-jdm.com/images/sohcvtec.jpgThis is a picture of the DOHC motor (Civic). http://got-jdm.com/images/b16a2_big.jpgNotice how much wider the DOHC head/valve cover is. This is due to the fact that there are two camshafts. DOHC- Dual OverHead Camshafts; SOHC- Single Overhead Camshaft. It is exactly what it sounds like. A SOHC has a single camshaft, whereas a DOHC has dual (2) camshafts. The SOHC has 1 camshaft that controls both the intake and exhaust valves. The DOHC has a camshaft for the intake valves and another one for the exhaust valves.

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