Yes, Scott, it definitely helps on the earlier blocks. 18V blocks had a
relief bored at the top of the threads so, on these, it is not really
necessary, but on all early blocks I always countersink the top of the
stud-holes.
Lawrie
-----Original Message-----
From: Scott Pontius <spontius@worldnet.att.net>
To: Lawrie Alexander <Lawrie@britcars.com>; Nina Barton
<ninab@scoresheet.com>; mgs@autox.team.net <mgs@autox.team.net>
Date: Friday, September 04, 1998 3:27 PM
Subject: Re: engine rebuild stuff
>Lawrie,
>The Leyland Special Tuning manual for the MGB says,
>"Before replacing the cylinder head studs slightly countersink (not too
>heavily) the tops of the threaded holes in the cylinder block. This will
>enable the head to pull down around the studs and seal more efficiently."
>Have you tried this, and do you find that it helps head gasket sealing?
>Scott Pontius
>'78 MGB
>Los Angeles
>-----Original Message-----
>From: Lawrie Alexander <Lawrie@britcars.com>
>To: Nina Barton <ninab@scoresheet.com>; mgs@autox.team.net
><mgs@autox.team.net>
>Date: Thursday, September 03, 1998 10:32 PM
>Subject: Re: engine rebuild stuff
>
>
>>Nina....
>>
>>Based on years of experience with these engines, the best advice to
prevent
>>recurrence of the blown head gasket syndrome is, first, to install all new
>>head studs, then to make sure you progressively torque the nuts in the
>>correct sequence (start at 20 ft. lbs., then increase 10 ft. lbs. at a
>>time), then to retorque as soon as the engine reaches operating
temperature
>>after the first time you start it.
>>
>>Lawrie
>>British Sportscar Center
>>-----Original Message-----
>>From: Nina Barton <ninab@scoresheet.com>
>>To: mgs@autox.team.net <mgs@autox.team.net>
>>Date: Thursday, September 03, 1998 9:34 PM
>>Subject: engine rebuild stuff
>>
>>
>>>If you have been on the list a year or so, I asked questions then about
>>>rebuilding an engine vs. having someone else do it. The answer came back
>>>resoundingly that I should do it myself. I have been pursuing this
course
>>>and have picked up an earlyish MGB engine (pre air rail) and have been
>>>working on it so that when I blow another head gasket, I can swap the old
>>>engine out and put this freshly rebuilt one in the car. I have the block
>>>back from the machine shop, and it has been decked so that it's flat.
>>>The head will be skimmed too, however it is still at the machine shop,
>>>This discussion of geometry comes at a good time for me, as within the
>next
>>>month or so, I will be reassembling this new engine. What should I have
>>>the machine shop do to make sure the engine will be correct, and what
>>>should I check myself? Thanks in advance, and if you need more detail on
>>>what's been done with the engine, I will be happy to supply it.
>>>Nina
>>>
>>>
>>
>
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