rcarr0327

iTrader: (1)

Hey everyone,
so i put my car back to stock a month or so ago. In doing so i bought a used with valves and springs because I was having problems with my valve train and thought it was my head...

anyways, i swapped everything out and it was running great but then i got a cylinder 2 misfire code. tested spark, fuel, and compression. compression was bad so I went onto the leak down test.

Leak down test turned out air was coming from the throttle body. So what does this lead to? bad valve seats or anything else?

doing a wet compression test tomorrow most likely, just to check piston rings.

let me know what you guys think, probably will take my old head to a machine shop to get it checked out and cleaned, then swap the old one back on if everything checks out. thanks guys

09CobaltSS1

Most likely one (or both) of the intake valves on the cylinder that compression tested poorly is getting hung open for one reason or another.

rcarr0327

iTrader: (1)

took apart the intake valves today and both the seats had some build up on them. want to take the head to get the seats refinished. anyone know a rough estimate on pricing? or any shops in the chicagoland or nw chicago area?

c130aviator

iTrader: (8)

I had my head resurfaced, valves and seals replaced, 82# valve springs/titanium retainers installed for 350 bucks. I brought him the parts. 350 was labor.

rcarr0327

iTrader: (1)

damn okay, i thought all my troubles would be gone after putting it stock. of course not. hopefully i can get this thing back together without dropping major bucks and get a different car. thanks guys. will keep updated

rcarr0327

iTrader: (1)

so i think im going to put my old head back on but need to clean it up and repair the threads for the timing chain guide on the intake side of the motor, anyone know the thread pitch or if that is even repairable? thanks