Quote:
Originally Posted by HighlandPete
The BMW/Rover M47R is the same basic unit (minus a few tricks) as the M47 320d engine.
So comes as a very thermally efficient diesel engine, and this is part of the reason for the Rover guys wanting every bit of heat from the engine. They have the 'water-flow' auxiliary cabin heater, (like the E46 diesels) so don't get that 'quick heat' we think we have, due to our PTC electric element cabin heaters.
Yes they are putting an in-line themostat in the top hose, the hose that emerges from the side of our M47/57 engines. Just to eliminate waste heat and the thermostats are more accurate than a 'lazy' OEM fitment.
We often think we have fast heating due to our PTC 'electric' auxiliary heating element, but that can mask a poor thermostat at low temperature. Also we have a lot of waste heat on warm up, as the whole expansion tank circuit is heating up as well, all made worse if we have a poor EGR thermostat and the coolant short circuits across the radiator, ahead of the main thermostat opening.
So easy to be running a 'lose, lose' coolant system.
HighlandPete
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Ok, undertand. yes my 320d did take longer to give cabin heat, but not much longer from memory.
But if the majority of our 30d's are running mid-80s and are still seeing good overall MPG....is this almost the norm in reality (even if running 5% cooler than spec)
What have you done Pete...living with mid 80s or changed the 'stats?