Idling at a light in traffic, haven't really "run" the car in weeks, felt a little hitch in the giddy-up, heard a clankity clank-clank from drivers side under hood...pulled over and shut it down. Called a tow and called it a night. Checked the plugs (see below). they looked lean, but okay. Cylinder 1 (most left in pic) had some pitting on the strap, but the rest on bank 1 looked the same. Little concerned on the leanness, but it was at idle. Did a compression check, all cylinders on bank 1 check out at 185-195...all good. Pulled valve cover, and found the broken rocker on #1 exhaust valve. Rotated engine over after pulling the rocker shaft assembly and all intake looked and worked fine. Paid close attention to valve seals and springs...all looked fine. Plan of action: First I need to measure overall spring height, and check to be sure my springs aren't moving on the pedestal (don't think they are). I'm running the blue stripe SRT exhaust spring with cam listed below. Rocker shaft (Thanks Cam). Mine has a burnished where it broke the rocker. the rocker itself also has a shiny mark in it. Don't know if it was the cause or the victim of the carnage, but regardless, i want to replace the shaft. Replacement rocker arm (Thanks Erik). I plan to install it on my original shaft and install, rotate engine by hand and watch cyl #1 exhaust valve. Make sure i don't have a lifter binding or a stuck valve. Measure gap in spring with feeler gauge once completely open. Making sure I'm not in coil bind. Any other suggestions i'm all ears. Also, anyone know of similar? Cam Doctor specs @ .050 Rocker Ratio: 1.65 LSA: 114.3 Valve overlap: .7 Intake Valve open @ 1.2 BTDC Centerline: 110.3 ATDC Valve close: 42.6 ABDC Duration: 223.8 Lobe Lift: .35874 Valve Lift: .59192 Lobe area: 27.81 deg Exhaust Valve open: 57.3 BBDC Centerline: 118.3 BTDC Valve close: -1.9 ATDC Duration: 235.4 Lobe lift: .35228 Valve lift: .58127 Lobe area: 28.92
I´d be in the hospital beeing treated for cardiac arrest... I don´t know enough about engines to realize its not so bad! Fredrik:cry:
I hope you get back going quickly Kyle. It would be nice to know that "it just broke"...hopefully by process of elimination you can come to that conclusion bro.
I think it's more of a lubrication failure from the first build using a 5.7 pump. I found more damage on a pivot area on cyl 5. That rocker is damaged as well. Plus, upon further inspection, the failed rocker looks to have broken a while before the rest did. The initial area edges are smoothed. The rest is jagged.
