jesus christ dude....that is it...the damn filler cap....i changed it with a different one off my parts car cause i thought it looked in better condition. I forgot all about it...it was my filler cap!!! i wonder if that caused alot of pressure and maybe blew that screw off. thanks foir you help wankels revenge and ronin

im going change it back to the original now!!!

sorry for sooo many questions but which cap should have the spring thing on the bottom of it? the radiator or the water pump neck?

no prob. good luck! :)

which cap should look like what?

im pretty sure the filler cap (just above the thermostat) is the flat one. The one on the radiator has the springy stuff on it.

cool thats what i thought. i still need to get 2 brand new ones. can you get them from anywhere except a dealership?

Probably...but i personally wouldn't. I find that OEM parts are better than aftermarket parts.....for applications like this anyway.

yeah i knew the aftermarket ones are shitty i was just wondering if i could get an OEM cap and Autozone or if i would HAVE to go to a dealer

Go to the dealer. Please go to the dealer.

If you have a series 4, the flat cap goes on the radiator and the one with the spring on it should be on the neck above the thermostat if I am not mistaken. That is the way it is on my friend's 86 SE anyway.

well im confused now, wankels revenge seems to think its the other way around. i have an 88TII if it matters. i was planning on getting OEM caps dont worry ive read the forum enough to know not to get a aftermarket one