Installation Of Cylinder Heads; Installing Cylinder Head Gaskets; Changing Compression Ratios; Replacing Camshaft Bearings - Cadillac 1937 LaSalle VVI Information

81
E N G I N E
places and the engine re-assembled. B y following
the above dimensions carefully a perfect j o b of
reboring cylinders and fitting oversize pistons can
be accomplished.
14. I n s t a l l a t i o n o f C y l i n d e r H e a d s
Series 37-50, 60, 65, 70 and 75
The two cap screws used at the water outlet
connection o n each cylinder head of series 37-50,
60, 65, 70 and 75 engines have oversize heads and
are Yi inch longer than the remaining cylinder
head cap screws. U s e these screws only at the
water outlet connection. See P l a t e 25, F i g . 1.
If these screws are installed at any other point
on the cylinder head and an attempt is made to
draw them up, they m a y break through the water
jacket and irreparably damage the entire engine
block.
Series 37-85 and 90
T h e cylinder heads of V-12 and V - 1 6 engines are
held i n place w i t h studs a n d nuts instead of cap
screws. Proper installation of these heads w i t h
their overhead valve mechanism etc., requires a
certain amount of care a n d adherence to the pro-
cedure shown i n F i g . 18, for tightening the nuts
as the cylinder heads are brought into place.
15. I n s t a l l i n g C y l i n d e r H e a d G a s k e t s
Cylinder head gaskets on 37-50 engines are
similar to those o n series 37-60, 65, 70 a n d 75
engines, except for the bofe, which is sufficiently
different to prevent their use interchangeably.
Use of the wrong gasket in either case m a y result
in a sluggish engine, due to an enlarged combustion
chamber or to a hot spot caused b y burning away
of the gasket.
Identification of the two gaskets is easily made
by the part number stamped on one surface
between the two inside cylinder bore holes. T h e
37-50 part number is 1419114; t h e 37-60, 65, 70
and J5 part number 1419759. T h e gaskets are
interchangeable between the right a n d left c y l i n -
der blocks of their respective engines.
Perfect Seal Gasket Paste is recommended for
use when installing cylinder head gaskets. T h i s
paste remains i n a semiTfiuid state which assures
a good seal a n d permits easy disassembly at any
time. .
T h e paste is available from the Parts D i v i s i o n
in a k i t under part N o . 1096830, containing an
eight ounce tube of paste a n d a special roller for
applying it. A carton of 12 eight ounce tubes is
available under part N o . 1096831.
C y l i n d e r head gaskets for series 37-85 a n d 90
engines are interchangeable between right a n d
left cylinder blocks of their respective engines.
16. C h a n g i n g C o m p r e s s i o n R a t i o s
A l l 37-series engines are equipped w i t h high
compression cylinder heads as standard. In the
event that a lower compression ratio is required
to meet certain operating conditions, this can
readily be secured b y installing special shims (2 on
each side) between "the cylinder heads and blocks
of series 37-50, 60, 65, 70 and 75 engines, or special
thick gaskets between the cylinder head and blocks
of series 37-85 and 90 engines.
T h e necessary shims or gaskets for lowering
the compression ratio of standard 37 series engines
are available from the factory Parts D i v i s i o n
under the following part numbers:
Series Part Name Part Number .
37-50 S h i m 1421931.
37-60, 65, 70, 75 S h i m 1421930
37-85 Gasket 894339
37-90 Gasket 896450
17. R e p l a c i n g C a m s h a f t B e a r i n g s
Series 37-50, 60, 65, 70 and 75—The recom-
mended procedure for removing or installing the
camshaft bearings o n series 37-50, 60, 65, 70 and
75 engines is as follows:
Removal—
1. D i s m a n t l e engine by removing such parts as
the generator, carburetor, manifolds, distributor
drive mechanism, hydraulic valve lifter assemblies,
etc., so that camshaft can be removed.
2. R e m o v e radiator and engine front cover.
3. R e m o v e transmission and flywheel housing.
4. Remove camshaft.
5. Remove'camshaft bearings by pushing them
out of engine bearing supports in which they are a
press fit.
Note: Special Tool N o . J-829 is recommended
for this operation.
Installation—
1. Check .new camshaft bearings carefully for
trueness, out-of-roundness, finish, etc.
2. P a i n t outside surface of new bearings with
white lead so they will slip readily into place.
Note: Be sure to line up oil holes in bearings
properly^ with passageways when install-
ing bearings.
3. Install front camshaft bearing, piloting
installation tool at rear a n d center bearing
locations.
• 4. Install rear camshaft bearing, piloting instal-
lation tool at front. >..
5. Install center camshaft bearing, piloting
installation tool at front a n d rear bearings. See
Plate 31, Fig.. 22.
6. Reinstall camshaft, front engine cover,
transmission a n d clutch housing.
Note: Exercise great care not to scrape or
damage camshaft bearings in any way
when installing camshaft as sharp edges of
cam lobes may easily ruin bearing.
7. Reassemble engine complete i n reverse
order of disassembly.
Series 37-85 and 90—The procedure for install-
ing new camshaft bearings on series 37-85 and 90