Car making noises
 

My car has been making these noises for a while, my valves tick which I gues are sticking, I already ran sea foam thorugh the brake boost im gonna poor it in my oil for the next 100 miles then change my oil to see if that helps. Could that mean I have low oil pressure?

2nd - my timing chain tensioner rattles alot when I start it up when it cold, im scared that someday my timing chain just going to snap and there goes my engine, should I really worry about the rattle when I start my car?

3rd - OK I havnt noticed this tha much but when im slowing down to almost a complete stop the rear calipers make a grinding noise kinda, why is that?

Ryan

Sumone please help me out, thanks!
Ryan

well your 2nd problem i dont know how bad your might be but i would fix it to be on the safe side, sorry if this doesnt help much but whe i first purchased my car the person never serviced the timing chain and it rattled lose and wore a hole into the timing chain cover near a water jet and that caused it to leak water into my oil not good. got it fixed though, but who knows how long the idiot before me drove with it messin up so i dont think that would happen immediately, just eventually i'd get that fixed. as for your other questions i wished i could be more help sorry, but i had your number 1 problem to, and i havent got time to mess with it yet.