Some time back I asked about a new oil pump
installation and the need to line bore because
a new oil pump would mean the front main
crankshaft cap was also being replaced as it is
part of a new oil pump. I called a machine shop
in Indiana who does work for a leading tractor
remanufacturing and tractor parts company. I
spoke with one of their techs and he told me he
has had this brought up before and some say yes
and some say no. His personal answer was yes,by
the book you should line bore. He went on to
say most folks just plasta gauge and if its
.003 or less they button it up. However as TOH
had told me the center of the crank would be
off and that is part of the reason he said to
line bore and the tech said TOH is 100%
correct. He told me I could take the liner out
and it may or may not show wear. I ask him if
the cap--liner and crank would self center, his
answer was no. So I can say yes line bore when
doing this job and avoid possibility of a
problem. If you did it the way I had done mine
and many others had you would get away with it
and never know. I going to leave mine alone and
not tear it out. At this point next time I
would have it line bored as TOH said it is the
correct way.To TOH I hope I explained the
centering of the crank correctly. <9))))))>{
installation and the need to line bore because
a new oil pump would mean the front main
crankshaft cap was also being replaced as it is
part of a new oil pump. I called a machine shop
in Indiana who does work for a leading tractor
remanufacturing and tractor parts company. I
spoke with one of their techs and he told me he
has had this brought up before and some say yes
and some say no. His personal answer was yes,by
the book you should line bore. He went on to
say most folks just plasta gauge and if its
.003 or less they button it up. However as TOH
had told me the center of the crank would be
off and that is part of the reason he said to
line bore and the tech said TOH is 100%
correct. He told me I could take the liner out
and it may or may not show wear. I ask him if
the cap--liner and crank would self center, his
answer was no. So I can say yes line bore when
doing this job and avoid possibility of a
problem. If you did it the way I had done mine
and many others had you would get away with it
and never know. I going to leave mine alone and
not tear it out. At this point next time I
would have it line bored as TOH said it is the
correct way.To TOH I hope I explained the
centering of the crank correctly. <9))))))>{