What do you think?

[vonrottes]

got a little deeper into my now dubbed toast 4.8L and found an ass load of metal and carbon/sludge in the bottom of the pan(it was gritty not slimy) and even more metal in the K&N filter.

 

on various other sites... everyone is telling me my exhaust valves were getting way too hot. my dad says they look OK just a little lean

 

probably ¼" thick in there.. that is only at 4,000 miles with 5,000 mile oil changes with castrol GTX and K&N filters and a grand total of about 10,000 miles I put on the engine

http://40.media.tumblr.com/9ebb54f90351f95b76721134f1b15746/tumblr_nrecjn7PR21suerqbo4_540.jpg

 

pan after cleaner got dumped in it

http://40.media.tumblr.com/c4a0d67222a045bce2f638e01b406e5a/tumblr_nreu7jwNgw1suerqbo2_540.jpg

 

all of the exhaust valves look like this

http://40.media.tumblr.com/1f834b1857cabce54fceb502514a6791/tumblr_nrcwdcEYIN1suerqbo5_540.jpg

 

 

I'm just a little confused as to how a stock PCM can run a engine too lean like I'm being told it is. as far as I know the ONLY things done to the PCM are what I paid for which was a VATS, EGR, A/C and rear O2's disabled.

gear ratio was NOT changed to 3.73 & 29" like I ask

 

I still have the EVAP run from the tank to a charcoal canister to the purge solenoid on the intake. fuel trims after the exhaust leaks were running minimum light throttle -5 to +14 at 60% throttle +

 

I never had overheating problems (actually kept it at 197-202)

never got a check engine light other than the knock sensors, O2 sensor in january and temp sensor because it came unplugged.

 

 

I'm scared the tune on the PCM is not stock and total crap, so looks like Friday I'll be setting up an appointment at dynotune to get a bench tune...

already emailed brain about it like.......9 months ago

[ImUrOBGYN]

They do look pretty cooked. (valves)