so i hav a d15 block 4 piston doesnt fire

n well ima go cheap jus this once n change valve's + springs n 4th piston its self
my dads friend good mechanic he said if somthn goes wrong ur car wont work ne more to jus leav it
but id lik this problem fix u no so ima go ahead n swap out pistons
is it true that if i put a different piston in it might not work

n what do you guys think is it wroth a try to save my block i mean the car runs beautiful so im considering on trying it well i am goen for it but
damn what do u guys think

im swaping pistons n valves for 4th cylinder
compression now 50 n words from you guys would be great
thanxs

 

if your going to change piston in 4th cylinde5 might as well do them all. pistons are a long and extreme pain in the rear end. might as well take all of them out if your dads mechanic does it, its like a good 500 dollars job min!