I have a 1998 863 bobcat that is used mostly for snow removal in the winter. I was wondering if anyone could tell me if there is anyway to get the temp (oil cooled) a bit higher for a cozier cab? Right now it only runs at about 140-160. I would like to see 180-200(if safely possible). It has the Duetz diesel which is oil cooled and the heater core has oil going through it. Right now the heater can barely keep the chill off. Any help?