2 weeks ago i blew out a plug on my driver side head. 2nd cylinder from the front. I felt the engines rough idle and knew what it was. All my plugs were no good. Due to internal oil leak from the valve guides. Smoking at start up symptoms. My c.o.p. Was destroyed along with a binded spark plug and a stripped plug thread on the drivers side head. I have received price quotes from ret in downey. The services im gonna have done are: helicoil on the head~valve guides on all 32 valves. 4oo$ for the head rethread and 1ooo$ for the valve guide job. Closer to 17oo$ after fluid-gasket set-valve guides-spark plugs-and a c.o.p.. Another problem i have is my differential started leaking the following day. The cobra has around 1O9K miles~so i believe its just maintanance for the diff. Drain it~clean it~seal it~fill it. Wouldnt anyone here have any pictures or links to a write up on how to lower the differential? I just wanted to let you guys know on whats going on with the cobra. Let me know on what you all think?

 

ouch sounds expensive man, its been awhile since ive been on here. im not too sure about the differenal part but i think the helicoil u may be able to do your self. keep me posted

 

Fixed?? ...good luck

 

if i were you i would just look at getting a set of new heads from the o4 casting. the early 03's only had 4 threads per plug while the later 03's and 04 had 9 threads per plug.

 

All mod motors had 4 threads tell 04 ford fixed there goof then.The dohc and 5.4 are more common to have the problem.