A friend of mine is buying a 1997 Montero SR 4x4 with 125,000 miles on it. Planning on taking it to a dealership to have them look at it. Anything specific we should look out for with this truck? Please let us know.
Thabks for your time.
Most owners NEVER engage 4wd so make sure to engage/disengage that & check that the CAD (Central Axle Disconnect) works first. May require cycling from 2WD->4WD->2WD several times before it works but it may not so check this before your Locker. Also, the Locker only works in 4 Low so check that as suggested but in 4L.
Check for all recalls and TSB's for that model/yr have been taken care of.
Valve guide seals frequently dry up and leak oil into the cylinders. Can determine if yours are bad by letting the engine idle for 3-5 minutes then revving the engine and check for black smoke. If you have it then new valve guide seals are required. Don't go for a full valve job unless you know for a fact that they're bad. I'd have a leak down test done (better than a basic compression test) to determine if the valves are bad. In my experience They don't go bad very often even with age.
Also check when spark plugs were last done. Make sure they're the longest rated plugs (100k) because to do the plugs usually requires removing the intake manifold. Can be done without doing that but requires the shop know how to do it. Most don't bother and instead charge you the extra labor to do it the long way.
HTH.