dohc is better
Yes, that is a great engine.
It depends. If there is a DOHC engine available that uses the same bottom end as your SOHC engine, then you can use that DOHC head. Just make sure that there are sufficient valve cutouts on the pistons. If there ISN'T a DOHC head available for your block, then a full engine swap would be a better idea. But even if there is, a full engine swap may be a better and more cost-effective option.
i believe the mounting is the same however the DOHC will have a better power output than the SOHC
The 2.4 litre DOHC engine is NOT an interference engine.
No , the DOHC engine is not an interference engine ( but the SOHC is an interference engine ) in a 2002 Dodge Stratus 2.4 liter
DOHC means Double Over-Head Cam. The engine has 2 camshafts that are located within the cylinder head at the top of the engine.
Dohc means that the engine has 4 valves per cylinder or 2 camshafts per head :)
You could have the 2.0 L - DOHC - 4 cylinder or a 2.5 L - DOHC - V6 engine
Generally, it is only possible to convert a SOHC engine to DOHC is if there is a DOHC version of that engine that uses a DOHC head on the same block as the SOHC version. However, there may be other complications here. For instance, if the SOHC head is a two valve head and the DOHC head is a four valve head, it will probably be necessary to upgrade your pistons so that you have sufficient valve reliefs for four valves. Otherwise, a piston to valve collision could result. In most cases, a better idea is to do a full engine swap to a DOHC engine. This way, you don't have to worry about such things as the availability of a DOHC head for your block or piston valve reliefs. Also, in most cases, a full engine swap is often cheaper, simpler, and necessary to be emissions compliant (if this is a concern where you live).
2
engine size is found on the engine, but all Mazda engines in the b and z family have the imprint of DOHC on the rocker-cover when they are dohc if you find an imprint of b6-XX-XX then you have a 1.6 and if dohc is found on the rockercover then it is a 1.6 dohc. if you see b8, then that is always a 1.8l SOHC engine
The 2.0 L - DOHC - 4 cylinder and the 2.5 L - DOHC - V6 engine