Questions, questions!
I have the opportunity to change my existing sickly ’98 4.6 Gems motor (with slipped liners) for a post ’99 Thor/Bosch 4.0 re-con/manufactured motor with top hat liners and after several hours trawling the forums believe it may be possible to regain the full 4.6 litre capacity, subject to the following adjustments:
Refit the 4.6 front cover for water pump & oil filter mounts.
Refit the 4.6 Crank & Con-rods to maintain the stroke (is sump pan still the same?).
Refit the 4.6 Camshaft gearwheel/sprocket and Position Sensor to maintain timing.
Refit & relocate the 4.6 Crankshaft Position Sensor so it matches the existing Gems reluctor ring, which I understand is critical and the sensor mounting position of the post ’99 4.0 block is appx 6mm different.
Are these actions likely to work with the existing 4.6 management systems and are there any other alterations necessary – or will this literally be a non-starter when it’s all back together? Should the cylinder heads be the same, apart from a minor valve seat angle difference?
Any advice would be gratefully received.
I have the opportunity to change my existing sickly ’98 4.6 Gems motor (with slipped liners) for a post ’99 Thor/Bosch 4.0 re-con/manufactured motor with top hat liners and after several hours trawling the forums believe it may be possible to regain the full 4.6 litre capacity, subject to the following adjustments:
Refit the 4.6 front cover for water pump & oil filter mounts.
Refit the 4.6 Crank & Con-rods to maintain the stroke (is sump pan still the same?).
Refit the 4.6 Camshaft gearwheel/sprocket and Position Sensor to maintain timing.
Refit & relocate the 4.6 Crankshaft Position Sensor so it matches the existing Gems reluctor ring, which I understand is critical and the sensor mounting position of the post ’99 4.0 block is appx 6mm different.
Are these actions likely to work with the existing 4.6 management systems and are there any other alterations necessary – or will this literally be a non-starter when it’s all back together? Should the cylinder heads be the same, apart from a minor valve seat angle difference?
Any advice would be gratefully received.
