HI i recently did a compression test on my b20block with b16 head. The results are

1 ..... 200
2 ..... im worried about this one 145
3 ..... 198
4 ..... 200
Does all these numbers have to match or was the guy who did my compresion test messing around with me. I was the one cranking in the car thats why and he was just telling me the numbers to write down. Also im kinda worried about number 2 which is 145 what can be done to make this catch up to the rest . . . valve grind my guess but more input would be nice. Was this guy serious with or he is just after the money. Let me know what to do.

 

you need to find out why that one cylinder is low. you need to do a leak down test to find out where you are loosing compression.

 

So leak down test first and then pull out head then do valve grinds.

 

i suppose.....if that cylinder is down on compression it's either a bad valve/sealing issue or a piston ring issue....it's gotta come apart anyway.

 

okay it is comin apart anyways.. imma upgrading pistons and I might as well remove head and redo everything i was planning to port polish too.

 

could be as easy as valve adjustment or carbon build up but if just adjustment, you dont have to touch the head. i recommend leakdown test before you jump to conclusions. but if u yank it, might as well yank it and put pistons in it