Do DOHC engines use two camshafts in each head?
Double overhead camshaft (DOHC) A double overhead cam, dual overhead cam, or twin-cam engine has two camshafts per bank of the cylinder head, one each for the intake valves and exhaust valves. Therefore there are two camshafts for a straight engine and a total of four camshafts for a V engine or a flat engine.
Is dual overhead cam better?
Generally, engines with dual overhead camshafts (DOHC) are higher performance engines, they produce more power, and can run at higher speeds. The engine can make more power if more air enters the cylinder, and it wastes less power if it is easier to pump the exhaust out of the cylinder.
What makes a dual overhead camshaft a DOHC?
Generally, engines with dual overhead camshafts (DOHC) are higher performance engines, they produce more power, and can run at higher speeds. The camshafts have the job of opening the valves that let air into and exhaust out of the engine. The camshaft uses rotating lobes, called cams, that push against the valves to open them.
What should the cam timing be on a DOHC engine?
If the cam timing was set to this smaller/narrower 110.5 degree lobe separation angle, the engine would behave much differently than the 113.5 degree lobe separation angle.
What’s the best way to alignment a camshaft?
Rotate the left camshafts counterclockwise to position the alignment holes approximately 30º before TDC. This places the camshafts in the neutral position (no valve load). For both sets of camshafts, loosen the camshaft bearing caps in the sequence shown in the service manual.
Where is the cam follower on a Mopar camshaft?
Tighten the bolts finger tight. Verify that the cam follower (3) is positioned over the valve lifter (4) (Figure 2). In addition, verify that the cam follower roller (2) is seated to the cam lobe (1). Using a mirror (Figure 3), verify that the valve stem (4) is centered between the cam follower guides (3).