Need help please

Hi i have a 2000 honda civic si... which is lowered and since the winter is coming i need to bring it back up and need a set of springs and struts. but i don't know if my engine is sohc or dohc..Here is a picture of my engine and could you guys tell me if it is sohc or dohc.....

and if anyone as stock springs and struts that will fit my car.. i am willing to buy it
also my gear box is really stiff going into reverse and i really have to use alot of power to put it into reverse... does anyone know what might be wrong and also i was driving today after warming up my car for about 5 minutes and realized in the middle of my drive that my engine thermometer went to cold and stayed their for a while and when i starting playing with the a/c it went back to normal and then went back to cold and it would got up and down.... doees anyone know what that might be

thank you

That is a SOHC engine. As far as it not going to reverse...maybe the clutch is shot. The other problem, check your anti-freeze. Sounds like it's low, usually indicated a leak.

Another possibility is the guage temp sender is going bad or the wiring to it is loose. As far as the reverse it could be the clutch or the slave/master cylinder not giving a full stroke for full release.