Parlor Coach is a term that initially appeared to identify Detroit Diesel engines installed on early day bus conversions. The reference is still used today to distinguish between recreational vehicles and highway trucks. When searching for information regarding care and maintenance of your Detroit Diesel RV engine, you may find it necessary to reference 'Parlor Coach.'

SCA means Supplemental Coolant Additives. SCA's wear out and require replenishment. Failure to regularly maintain engine SCA's can result in a plugged radiator and heater, engine malfunction, corrosion, pitting, rust, and scale build up. Improper use of additives and coolants can result in extended engine down time. Extensive studies have been performed to determine what types of Supplement Coolant Additives work best to extend the life of the Detroit Diesel engine. Consult the engine operator's manual, or contact the engine manufacturer direct, for information on individual SCA recommendations for your specific RV engine.

Use test strips to determine coolant requirements at each preventive maintenance cycle. For warranty purposes, use only test strips approved by the engine manufacturer. Test strips are date stamped, packaged in a sealed container and can be purchased individually. Cost is minimal. Always check the expiration date. The test strip will show the low end and calculate what needs to be added. Do not mix coolants.

Extended life coolants are primarily designed for long haul trucks that regularly ignore recommended maintenance schedules. For use in RV engines that are regularly maintained, the increased price of extended life coolant is generally not considered cost effective. Normal test strips used with extended life coolant may only test parts of the coolant. If you are using extended life coolant in your RV Detroit Diesel engine, use test kits designed specifically for extended life coolant.

Oil changes are inexpensive maintenance that pays through a longer engine life. Due to the increasing number of individual engine sizes used in RV's today, refer to the Detroit Diesel operator's manual for suggested change intervals. For best results, use Detroit Diesel recommended oil brand types. Cold weather climates may require lighter weight oil. Synthetic oil is acceptable, but like extended life coolant, can add unnecessary expense when the engine is regularly maintained.

Extending oil changes may save you dollars in materials and reduce the hassle of disposing of old oil, but will cost more in wear on the engine. Recommended service intervals are based upon extensive test studies performed to determine the best way to extend the life of the RV engine. Change oil when warm. Use a sturdy oil drain pan large enough to hold the entire amount of used oil. Clean and carefully inspect the oil drain plug for wear. Keep detailed records of all maintenance work performed on the Detroit diesel engine, including receipts.

Oil filters are constructed using fibers that work to remove particles from the oil. The engine manufacturer has also engineered filters that are proven to best perform on these specific engines. Less costly filters available at auto supply outlets or through discount department stores that are not recommended by the engine manufacturer may save you a few dollars in maintenance fees, but could ultimately cost more in engine wear.

Moisture may build up in the crankcase of RV engines parked over a period of months. Once the RV has been parked for three months or longer, have the engine oil changed before embarking on the next trip.

In the event you are considering a replacement engine, beware of the difference between a 'Rebuilt' and a 'Remanufacture.' Rebuilt engines are generally less expensive due to the fact they are comprised of primarily used and outdated parts. If there is a warranty on the rebuilt engine, chances are that the warranty is restricted to only the shop that performed the work. Remanufactured engines usually include new and updated parts along with a factory warranty honored at all factory service centers. The cost of a remanufactured engine is higher than that of a rebuild, but may be more practical for RV travel that frequently changes location.

Daily - Check the oil and coolant sight glass for correct level. Inspect the fuel separator for signs of water or debris.

Weekly - Inspect the battery connections for corrosion, and fill battery cells.

Monthly - Check the belt and hoses for cracks. Inspect coolant when cold for color, consistency and smell.

Winter Storage - Change the oil and filter and fill the fuel tank. Check antifreeze levels using the test strip. Pull the battery cables. Fuel additives may not necessary for winter storage purposes, contact the engine manufacturer for further information pertaining to your individual engine requirements.

When storing the RV, do not cover the engine using a tarp. Cutting off air to the engine will prevent moisture from dissipating and cause rusting. To further protect the Detroit Diesel engine during storage, park the vehicle on a flat surface of asphalt or concrete. Extended parking on gravel or grassy surface will allow moisture from humidity and rain to soak up through the ground under the RV and promote water build up in the engine compartment and frame rail to create rust and corrosion.