As I dont have the original engine in my cougar any more and the replacement engine has 47,332.6 miles less on it, is their any legal reason as to why I cant change the odometer setting on my ecu to read the engines milage?
Doesn't the mileage reflect on the car as a whole? How can you 'legally' change the mileage because of an engine change? The rest of the car still has XXXXXX miles wear and tear on it.
as Jamie said. the mileage is on the chassis and things bolted to it. just changing the engine doesn't warrant altering it. or mine would be on zero not 134, 000. the only time I would alter the mileage would be replacing dash clocks due to failure.
The engine is but a small part of the whole car. You need to retain enough of the original car (or parts plus fitting receipts) of brand new parts just to maintain the car's registration mark. Too many second hand bits and thry'll require you to change to a Q plate as you can't prove the age of the car. Milage affects brake cylinders, steering racks, gearboxes, driveshafts etc too. Even non moving parts due to metal fatigue. You can't just wind 50k off the car's recorded history because of a second hand engine!
Legalities are very simple...you have to keep the original mileage. Historical mots would show up any discrepancy.
Just have proveable history of the new engine to add to your folder if and when you sell the car.
Cat4 has 120k plus on her, but the engine has only done half that.
As mentioned previously the only parts that are not reconditioned or replaced are the shell, the front subframe and the interior bits every other part has been either reconditioned or replaced with genuine parts in the last 2 years, I was under the impression that q plate was for moddified away from manufacturers design.