headgasket blown :( i think

[ZiplokeR]

iv'e been haveing p0300 and p0304 error codes as well as overheating every few days. could a blown headgasket cause both the coolantloss and misfire problems?

plus, the bottom of the oil cap does look a bit milky sort of.. im in denial

[LatinoX20]

that does look like a blown head gasket... good luck wit dat

[Silver_8G]

Besides the oil on the cap how does the rest of the oil look? How often are you putting coolant in it? Whens the last time you did a tune up on the ignition? Coolant mixing into your oil is usally a head gasket though.

[criz067]

When i blew a head gasket i had whitish smoke coming out of my tailpipe.

[00galantguy]

Do a compression test then youll know for sure

[ZiplokeR]

i just did a compression check but not sure how to interpret the results or if im doing correctly.

cylinder 4 - 190psi
cylinder 3 - 192psi
cylinder 2 - 239psi
cylinder 1 - 220psi

i added a little bit of oli in cylinder 4 & 3 then measured it again

cylinder 4 - 279psi
cylinder 3 - 225psi

before testing i drove the car around for a few minuets till the temp gauge was in the middle then unplugged the crankshaft position sensor and took out all the spark plugs etc.. after screwing in the compression guage i kept craking the engine about 7 or so times per cylinder till the compression guage maxed out.

Also, the oil on the dipstick looks ok.
ive replaced the sparkplugs, coilpacks & wires
and it overheats after about a week then i top off coolant and im good for another week or so.

I'm seriously thinking about just taking it to the dealer and paying the $200 it would cost to do a full diagnosis.. what do you guys think i should do.