2011 Jeep Wrangler 3.8L/42RLE with 131,xxx miles. Customer complaint......Misfire & a Squeaking noise.
*DTC P0303 (Misfire Cylinder #3), Using my Low Amp Clamp & Scope.....Verified one cylinder has low compression.
*Performed Leak Down test on Cylinder #3 at TDC with Bank 1 Rocker Shaft removed, 75% leak down.....With no air escaping the Intake or Exhaust valves.
*Removed Bank 1 Cylinder Head (Which is quite easy) & found the Piston had a broken Crown/Ring Land, Galled the Cylinder wall, And had been VERY hot (Has a charcoaled look to it)
*Flowed all 6 injectors & found #3 to be severely restricted.
Boy.....The wrecking yards want a king's ransom for these engines, It's not much more to completely rebuild this one, Will be Hot Tanked, Bored & Honed, Decked, New Cam bearings & Core Plugs installed. Heads will get a Valve Job, Surfaced, & new Guide Seals.
Crank looks perfect as did the Rod & Main Bearings....But will get new Inserts, Timing Chain was a little loose so it will get a new one along with new Lifters & Oil Pump.
Both Exhaust Manifolds are cracked & will be replaced. Still had the original copper Champion plugs in it!!!
*DTC P0303 (Misfire Cylinder #3), Using my Low Amp Clamp & Scope.....Verified one cylinder has low compression.
*Performed Leak Down test on Cylinder #3 at TDC with Bank 1 Rocker Shaft removed, 75% leak down.....With no air escaping the Intake or Exhaust valves.
*Removed Bank 1 Cylinder Head (Which is quite easy) & found the Piston had a broken Crown/Ring Land, Galled the Cylinder wall, And had been VERY hot (Has a charcoaled look to it)
*Flowed all 6 injectors & found #3 to be severely restricted.
Boy.....The wrecking yards want a king's ransom for these engines, It's not much more to completely rebuild this one, Will be Hot Tanked, Bored & Honed, Decked, New Cam bearings & Core Plugs installed. Heads will get a Valve Job, Surfaced, & new Guide Seals.
Crank looks perfect as did the Rod & Main Bearings....But will get new Inserts, Timing Chain was a little loose so it will get a new one along with new Lifters & Oil Pump.
Both Exhaust Manifolds are cracked & will be replaced. Still had the original copper Champion plugs in it!!!