MG Midget J1 1933 Instruction Manual page 26

Between the projecting portion of the cylinder head block and the
dynamo will be found a circular flexible coupling. Removc the two bolts
which attach it to the dynamo drive yoke. This will permit the flexiblc
coupling to be withdrawn with the cylinder head.
T h e cylind,er head is held o n to the cylinder block by ten nuts screwed
o n to the long studs passing throllgh the cylinder head.
Slacken off these
nuts in rotation (see Illustration
No. 2 3 ,
half a turn at a time, until they are
quite loose, then finally remove them. It is unwise to unscrew any o n e
of these nuts completely before slackening off the remainder, as this will
impose uneven stress upon the cylinder hsead, leading to its distortion.
INLET MANIFOLD
CYLINDER HEAD GASKET MAN'F0LD
Figure
17.-Genrral v i w o f the c j l i n d r r lie,lrl aller r c ~ n o v a l
shelving
t h r m a n ~ f o l d , etc.
T h e cylinder head is now ready to be lifted from the cylinder block.
T h e breaking of the joint between the two will be facilitated by smartly
tapping the sides of the head with a wooden mallet o r with a hammer with
a piece of wood interposed to take the hlow. T h e joint may, however, not
break freely, in which case it is permissible to insert a screwdriver o r similar
blunt wedge-shaped tool bet-cen the joint at the two places-one o n either
side of the engine-where the cylinder head gasket has been cut away f o r
the purpose. D o not insert the screwdriver too far. It should o n no
account be forc'ed against the gasket, which would become damaged as a
result. W h e n the joint is broken no difficulty should be experienced in
lifting the head clear of the studs providing it is withdrawn squarely. Place
the head o n a bench out of harm's way, and carefully lift the copper asbestos
gasket straight off the cylinder head studs, keeping it parallel with the upper
face of the cylinder head block and taking particular care that it is not bent
o r otherwise damaged in the process.
Decarbonising. Everything is now in readiness for decarbonising the
piston crowns and the surrounding face of the cylinder block. T u r n the
engine by the starting handle until any two pistons are at the top of their
travel, whmen i t will be found that the remaining two are at the bottom of
their cylinders. Stuff the open ends of these cylinders with clean rag, and
with au old screwdriver, o r some blunt tool, scrape the black deposit off the