Howell Automotive has been in the auto repair industry for over 18 years in Silverton, Oregon. The different service we provide here are as follows: timing belts service, maintenance, tune ups, cooling system flush, check engine light, etc. Howell Automotive has been in the auto repair industry for over 18 years in Silverton, Oregon. The different service we provide here are as follows: timing belts service, maintenance, tune ups, cooling system flush, check engine light, etc.