Originally Posted by sublime
I have 127,600 on my '08 GT, running Mobile1 and was informed the knocking and "check engine" light looks like i have carbon on my valves with an estimated cost of $3,500. ouch! is this reasonable? and what does this entail, essentially an engine rebuild?
Get a second opinion.
Which mobil 1 have you been using ?
Put some good oil in it, put some seafoam cleaner in the gas tank and drive the car like it was ment to be driven. Highway miles is whats needed.
You shouls also move this question to the 4th Gen forum in the normal forum. You'll get more responses.
What was the CEL code?
178,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here
Last edited by Max Capacity; 01-25-2013 at 09:28 AM..