The End of the Road for the minivan.
It is with sadness that we must bid farewell to a motorized member of the family. She was thrifty to feed, Inexpensive to insure, and thrived on the abuse from carrying a troop of teenaged Boy Scouts outbound and home again on numerous adventures. Surviving a 80-year-old oak tree trunk that fell across the back half and crushed the roof rack, She finally gave up last week, just 400 miles shy of her 400,000 mile-iversary.
We acquired her , gently used, at 100,000 miles 10 years ago. Fully loaded with front & back climate control, stow & go seats, DVD entertainment system with 4 headsets, and XM radio. We were cautioned that these vehicles had a reputation for the transmission to fail, but that never gave us any trouble.
The diagnosis went like this:
Although still running , The initial complaint was roughly shuddering, weak vacuum and loss of power. One computer code was stored - CYL 2 missfire. Pulling the spark plug showed a curious deformation- the electrode was curved around into a "hook" shape instead of the typical sharp bent angle.
No air bubbles in the radiator coolant and no oil contamination almost ruled out a blown head gasket. A quick check of the ignition shows strong spark on all 6 plugs.
Excellent fuel pressure.
Moving on to a compression test, cold and dry - a respectable 155-160 PSI on 5 cylinders, 0 PSI on CYL number 2.
I ordered a bore camera on Amazon to determine what had come undone inside, ..... before it arrived, I decided to go ahead and pull the head anyway. It was a cozy 1-1/2 hours made easier because CYL 2 is on the "front" head. I was really concerned about breaking (literally) loose the tiny rusty exhaust manifold bolts, but they came out of the aluminum heads easily.
Here is the head damage, dropped valve seat propping the intake valve open, and a piece of the casting shroud around the spark plug is also missing...
And the perforated piston, block and cylinder....
She is destined for the wrecking yard with many new-ish parts that might be re-cycled, but fair warning : Among the original 17 years/400K equipment that was still in working order:
Driveshafts and CV joints
Wheel bearings
Brake calipers
Steering Rack
Lower control arm bushings
Fuel pump
Exhaust system
Power Window and door motors
Every engine sensor.