tyty,

Is yours SOHC or DOHC? DOHC more labor intensive ($$$ shop repair) to fix, because more 'stuff' in the way to get to the valve stem seals.

Try:
Rally Sport Engineering, Costa Mea, CA (949) 548-0978
Owner: Paul Ludgate
He owns a Montero himself.
Former crew chief for various Suburau rally racing teams.
Website: http://www.mitsubishirepair.net/

Good luck !!!

'90 Gen 1 Montero LWB (Original owner, daily driven x 32 yrs and counting)
400k+ miles & still going strong !!!