I'm new to the forum, but hoping someone clever than me can help me out!
I have a 20 year old Nanni 4.190HE motor
in my narrowboat that is starting to drip oil
from the crankshaft that powers the pulleydrive. I've had a good look online for a manual and it seems that its going to be the oil seal
- which after 20 years seems quite understandable.
My confusion lies in how to replace the part. The manual tells me I need to remove the pulley wheel
and then remove the whole gear
casing from the front of the motor
(meaning the gasket
and O rings will need replacing too). This seems a ruddy big job just to replace a consumable seal! My father in law (who is wiser than me in these matters) thinks it should be possible to replace the seal without removing the casing - which makes sense, but seems counter to the manual.
So - is it possible to replace the seal from the outside? Easier and cheaper, but won't the oil
pressure blow the seal out?
Or - do I need to put my back out lifting the whole gear
casing away from the motor? If so - does anyone have any idea how big a job this is in practice - and whether its a job I should take on myself, given I'm more at home with motorbike engines than ruddy great diesels!
Hope someone out there can help -
Cheers - Cuckoo