Lawrie, that's a good point. I should add that I didn't exactly mean to
give that impression, more like "you've bought the car, but all is not
lost, there may be a reasonable fix if you're up to it"...
I also should have added that he should take it to a reputable
professional for an opinion.
Lawrie Alexander had this to say:
>Which, again, pre-supposes that the amateur mechanic has a slide-hammer with
>which to remove the main caps, as well as a torque wrench that reads
>accurately to 70 ft. lbs. to replace them.
>
>The purpose of my note to Max was not to say that this job cannot be done.
>Anything can be accomplished given enough effort, knowledge and ingenuity. I
>was trying (and apparently failing) to make the point that it is a very
>difficult job, not one for the inexperienced mechanic. I felt that Max's
>original note gave the impression that it's OK to buy an engine with known
>bad main bearings, on the assumption that changing them was something the
>average person could do about as easily as changing rod bearings.
>
>Lawrie
>
>-----Original Message-----
>From: Bruce Burrows <bburrows@webtv.net>
>To: mgs@autox.team.net <mgs@autox.team.net>
>Date: Sunday, May 07, 2000 7:02 AM
>Subject: Re: (Lawrie) Low oil pressure
>
>
>>
>>--WebTV-Mail-27666-245
>>
>>My best recollection on this is the "trapped" inserts can be very
>>_gently_ tapped (a small, light hammer and punch will do the job) on the
>>visible edge opposite the locking tab. This causes them to rotate round
>>the journal and into a position wherefrom they can be pulled free.
>>
>>The new insert is installed, in the presence of much oil and/or prelube,
>>by reversing the procedure. Smooth end first, it is slid into and then
>>round the space twixt journal and block, until the locking tab is
>>engaged.
>>
>>In order for the above to apply, it is necessary first to remove the
>>journal caps. I cannot recall if the rear cap can be removed with the
>>engine in the car. But it may not be pivotal.
>>
>>If the journals are decent but the inserts worn, some oil pressure
>>improvement can be had merely by replacing those inserts which _are_
>>accessible. The resulting pressure rise will help preserve what remains
>>of the inserts(s) which could not be serviced.
>>
>>Bruce Burrows
>>
>>'59 MGA basket case
>>'60 Daimler SP 250
>>'61 Daimler SP 250
>>'73 MGB driver
>>
>>My Dart website (not my cars!):
>>
>>http://community-2.webtv.net/guardian45/THEDAIMLERSP250DART/
>>
>>
>>--WebTV-Mail-27666-245
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>>Message-ID: <003501bfb7c8$5952bd00$4951d3cf@lawrence>
>>From: "Lawrie Alexander" <Lawrie@britcars.com>
>>To: "Max Heim" <mvheim@studiolimage.com>, "MG List" <mgs@autox.team.net>
>>Subject: Re: Low oil pressure
>>Date: Sat, 6 May 2000 18:59:52 -0700
>>MIME-Version: 1.0 charset="iso-8859-1"
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>>Reply-To: "Lawrie Alexander" <Lawrie@britcars.com>
>>
>>Max,
>>
>>I can see how one would be able to replace the shell that is in the cap but
>>how on earth would you R & R the cap that's in the block saddle with the
>>crankshaft still in place?
>>
>>Lawrie
>>-----Original Message-----
>>From: Max Heim <mvheim@studiolimage.com>
>>To: MG List <mgs@autox.team.net>
>>Date: Saturday, May 06, 2000 12:39 PM
>>Subject: Re: Low oil pressure
>>
>>
>>(SNIP)
>>
>>>I think you can replace the main bearings with the engine still in the
>>>car.
>>
>>
>>--WebTV-Mail-27666-245--
>>
>
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
|