The size of the crankshaft rear bearing cap oil pipe has been changed from 5/16”to 3⁄8” (see Fig. 864). Increasing the size of the oil pipe allows the oil to drain more quickly from the main bearing into the oil pan tray especially in cold weather.
In replacing an A-6327-A or B type rear bearing cap when the engine is not disassembled, it is necessary to replace the same type of cap which was removed. This is necessary as, due to the difference in thickness of the bolt bosses in the A and B type caps, different length bolts are used, …
When starting the engine, especially in cold weather always disengage the clutch. This relieves the battery of the additional drain of having to turn the gears in the transmission when starting the engine.
Before replacing a cylinder head pour at least a tablespoonful of engine oil around the edge of each piston to insure sufficient lubrication when engine is started. When engine is thoroughly warmed up all cylinder head nuts should be taken. taken up slightly. This operation should be repeated several times especially during the first 50 …
Supplementing piston pin retainer information described on page 366 in the August Bulletin, it should be unnecessary to point out that the width of the retainer groove in the present connecting rod was reduced to correspond with the width of the new retainer, and that care must be used not to mix present production rods …
In addition to the new A-6140-A piston pin retainer now being used in production and which was described in the July Bulletin, a new retainer A-6140-BR has been released to take care of service requirements in cars having rods and pins with the previous design wider retainer groove. The new retainer will be available within …
The width of the A-6140 piston pin retainer has been changed from .120 over .123 to .115 over .116 and the retainer groove in the upper end of the rod narrowed down from .128 over .130 to .117 over .118. These changes provide a closer fit for the ring and add to the quietness of …
A new crankshaft rear bearing cap A-6327-CR has been released for service. This cap provides a replacement bearing for use with crankshafts on which the rear bearing surface has become worn. It has a 1.618/1.620 bore and is 3.013/3.018 between the thrust faces as compared with the standard cap (A-6327-B) which has 1.623/1.624 bore and …
Fig. 629 shows the new design one piece intake and exhaust manifold gasket A-9448. The new gasket obsoletes the old style manifold gaskets and glands as no glands are used with the new design, the gasket being held in place when assembling manifold by means of the studs on the side of the block. This …
A percentage of Model “A” cars are now being equipped with solid skirt pistons. These pistons are a trifle lighter than the slotted skirt design and consequently should not be used interchangeably. The piston heads in the solid skirt pistons are fitted with a non-expanding steel insert anchored to the center of the piston head. …
((618)) Under no circumstances should a hammer be used on the piston pin pilot and driver when installing a piston pin. Immersing the piston in boiling water for a minute or two will expand the piston pin hole sufficiently to permit easy installation. To correctly install pin first insert the piston pin pilot and driver …
A blown out cylinder head gasket can invariably be traced to failure to securely tighten cylinder head nuts, particularly during the first 50 miles a new car is driven. During this period the new cylinder head gasket becomes slightly compressed, as a result all of the cylinder head nuts can be taken up several times …
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