Let me know how it turns out if decide to do it. I found an
article yesterday that confirms it can be done. I'm wrong!
...Art
On Sun, 31 Aug 1997, ROBERT G. HOWARD wrote:
> I've seen a mechanic use a tool to change the upper half of main bearings
> with the engine in the car. The thing is shaped like a bearing shell,
> sort of, with a pin on it that engages the oil supply hole in the upper
> bearing shell. Then the crank and the tool are turned together, and the
> bearing spins out. Have never used it myself, but it looked easy when
> the guy did it. I think the tool was a Lisle or one of the other
> well-known handy tool makers. A trip to the parts store might turn up
> such a useful item.
> Bob
>
> On Sat, 30 Aug 1997 17:27:20 -0400 (EDT) Arthur Pfenninger
> <ch155@FreeNet.Buffalo.EDU> writes:
> >On Sat, 30 Aug 1997, Scott Gardner wrote:
> >
> >>
> >> > I am having problems with low oil pressure on my 70 Roadster and
> >a
> >> > friend visiting my neighbor from Australia said that what they
> >used to
> >> > do was to pull the oil pan and replace the main and con. rod
> >bearings
> >> > and it was good for another 40,000 miles.
> >> >
> >> > Has anybody else done this and is it prudent maintenance?
> >> >
> >> > Thanks for any advice.
> >> >
> >> > Warren Pruitt
> >> >
> >> > 70 MGB Roadster
> >> >
> >> Warren,
> >> I think it would be a good idea to replace the bearings as
> >you
> >> described. Not all parts of the engine wear out at the same rate,
> >> and I've heard 30-40,000 miles as a fair service interval for
> >> crank/con rod big-end bearings.
> >> Bear in mind that if replacing those bearings doesn't work,
> >the cam
> >> bearings may be worn, although they are supposedly pretty sturdy.
> >> Check the rocker shaft for wear, as well.
> >> Scott
> >>
> >
> >
> > It may as simple as your oil pressure relief valve being bad.
> >It's
> >a cheap fix. Per my previous post you can't replace the main bearings
> >without pulling the engine. You need to remove the crank shaft to get
> >the
> >top of the bearings out, not to mention how hard it would be to try
> >and
> >pull the caps off while laying on your back.
> >...Art
> >
> >
>
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