The crankshaft pulley bolt may become loose or break causing loss of power steering operation and other related engine accessories. Some of these vehicles may be involved in a recall for this issue. Our technicians tell us that an updated bolt may be available. Replacing as necessary and properly torquing the crankshaft bolt will commonly correct this issue.Google+
Car Problem Reports
Mitsubishi Montero Loose or Broken Crankshaft Pulley Bolt
Mitsubishi Montero Problem
Engines Affected: 3.0L V6, 3.5L V6
Average Mileage: 169,716 mi (80,000 mi - 275,000 mi)
Visitor, 1996 Mitsubishi Montero, 3.0L V6, 200,000 mi
the roll pin holding the crankshaft pulley to the timing sprocket broke, probably due to loose crank bolt.
This same problem happened to me when I bought the truck at 196000 miles for $600 bucks, and a thousand miles later the crank pulley pin sheared too, twice in little less than a thousand miles. The last time I was stranded in a busy intersection with my wife and daughter. To those out there experiencing the same problem try this, try to drill a second pin hole in the pulley at the same exact location but in the opposite side of the first pin hole, and instead of having one pin you now will have two pins holding the crank pulley. One on each side of the crank pulley,so that crank pulley can stay locked in place, but make sure you use the strongest thread locker.I think I have figured it out. This is just my idea to do it my self, but you can talk to a mechanic and see what they tell you. I am about to do that to my crank pulley hope I fix it for good, and I hope you too. 01/17/14 Eddy
Visitor, 1995 Mitsubishi Montero, 3.5L V6, 190,000 mi
Loose crankshaft pulley bolt
Visitor, 2000 Mitsubishi Montero, 3.5L V6, 145,000 mi
BOLT CAME LOOSE SHEERED ROLL PIN. DRILLED OUT OLD ROLL PIN REPLACED WITH NEW BOLT AND PIN. NOTE: ADD BLUE THREADLOCKER TO NEW BOLT AND USE REVISED TORQUE SPECS.
Visitor, 1996 Mitsubishi Montero, 3.5L V6, 190,000 mi
bolt came loose on the crank shaft leaving me stranded at the store, sheared the roll pin, now im on my way to the junk yard to find another one,
Visitor, 1996 Mitsubishi Montero, 3.0L V6, 190,000 mi
Crank bolt got loose and caused the harmonic balancer to sheer the roll pin that holds it to the sprocket. It also wore out the inside of the balancer. Replacing balancer and pin and re-torqueing bolt to spec.
Visitor, 1997 Mitsubishi Montero, 3.5L V6
This is the second time the crankshaft pulley bolt has sheared off in the engine. I don't know why it keeps happening.
Visitor, 2002 Mitsubishi Montero, 3.5L V6, 140,000 mi
harmonic balancer bolt loosened --> $1200 repair --> occurred again 15,000 miles later with added complication of stripped crankshaft --> vehicle scrapped.
Visitor, 1997 Mitsubishi Montero, 3.5L V6, 239,000 mi
Broken bolt. Drill out and replace
Visitor, 2001 Mitsubishi Montero, 3.5L V6, 160,000 mi
Bolt came loose, pin sheared ,then i ground down end of crankshaft sprocket that harmonic balancer bolts on to('cause i drove around asking pep boyz auto zone part guys guys what was wrong. duh ?)