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LSG 875 — Removal and Installation

For the LSG 875.

Procedure

  1. take Manifold. 2. Remove the valve rocker arm covers. Loosen the rocker arm bolts and turn rocker arms to one side. 3. Remove the push rods in sequence. 4. Remove the valve tappets with a magnet. Place them in a rack in sequence. If the tap- pets are stuck in bores, use plier-type tool T70L-6500-A to remove them. Rotate tappet back and forth to loosen them from’gum or varnish deposits. Refer to cleaning, inspec- tion and testing procedures earlier in this section.
  2. pets in their original bores. Check any new tappet for free fit in bore to which it is to be installed. 2. install push rods in original positions. Apply Ford Polyethylene grease DOAZ-19584-A or equivalent to valve stem tips and push rod ends. 3. Position the rocker arms over the push rods. and tighten the bolts following the procedure under Valve Rocker Arm Installation. 4. Install rocker arm covers following pro- cedure under Rocker Arm and Cover Installation. 5. Install intake manifold and carburetor, fol- lowing the instructions under Intake Manifold. CYLINDER HEADS Removal 1. Remove intake manifold and carburetor as an assembly, following procedure under In- take Manifold Removal. 2. Loosen alternator attaching bolts and re- move bolt attaching alternator bracket to right cylinder head. 3. Remove valve rocker arm covers. Remove rocker arm bolts, rocker arms, oil deflectors, fulcrums and push rods in sequence so they can be installed in their original positions. 4. Remove cylinder head attaching bolts. Lift cylinder heads and exhaust manifolds as as- semblies from cylinder block with a hoist. If necessary to loosen cylinder head gasket seal, pry at forward corners of cylinder heads against casting bosses provided on cylinder block. Do not damage ma- chined surfaces of head or block. Dis- card cylinder head gasket. 5. If disassembly or machining of cylinder head is required, remove exhaust manifold.
  3. 1 . 2 . 3 . 4 . 5 . Clean cylinder head, intake manifold, valve rocker arm cover, and cylinder block gasket surfaces. If cylinder head was removed for cylinder head gasket replacement, check flatness of cylinder head and block gasket surfaces. If exhaust manifold was removed, coat cylinder head and manifold port areas with film of graphite grease and install mani- fold and gasket to cylinder head. Position new cylinder head gaskets on block over dowels. Do not apply sealer to head gasket surfaces. Place cylinder heads on block and install attaching bolts (longer bolts in lower row of bolt holes). Tighten all cylin- der head attaching bolts in sequence in three steps to specifications. When this procedure is used, it is not necessary to re-tighten bolts after extended operation. Clean and inspect push rods, one at a time. Clean the oil passage in the push rods with a suitable solvent, and blow out with co,m- pressed air. Install push rods in original positions. Apply Ford Polyethylene grease DOAZ-19584-A or equivalent to valve stem tips and push rod ends. Lubricate and install the rocker arms follow- ing the procedure under Valve Rocker Arm Installation. Be sure lower ends of push rods remain seated in valve lifters. sembly, following procedure under Intake Manifold Installation. 7. Perform valve clearance adjustment, as de- tailed under Valve Clearance Adjustment, only if necessary. 8. Apply oil-resistant sealer to one side of new valve rocker arm cover gaskets. Lay ce- mented side of gaskets in place in covers. Install covers. 9. Install bolt attaching alternator bracket to right cylinder head. Adjust alternator drive belt tension to specifications and tighten al- ternator attaching bolts. 10. Fill cooling system as necessary. 11. Start engine and check for leaks. 12. Check and adjust carburetor idle speed and mixture as required. EXHAUST MANIFOLD Removal 1. Remove attaching bolts and washers, and remove exhaust manifold(s), lifting bracket(s) and spark plug wire heat shields. Inspect the cylinder head joining flanges of the exhaust manifold(s) for evidence of exhaust gas leaks. Inspect the manifold(s) for cracks, damaged gasket surfaces, or other defects that would make them unfit for further service. Installation 1. Clean mating surfaces of exhaust mani- fold(s) and cylinder head(s). Apply light film of graphite grease to exhaust manifold(s). 2. Position spark plug wire heat shields and exhaust manifold(s) on cylinder heads. In- stall attaching bolts and washers, starting at fourth bolt hole from front of each manifold. Position lifting bracket under bolts at third exhaust port from front of engine. Tighten bolts to specifications, working from center of manifold to both ends. 3. Place new gasket(s) on inlet pipe(s). Posi- tion inlet pipe(s) to manifold(s). Install at- taching nuts and tighten to specifications. 4. Start engine and check for exhaust leaks.

Source: manual:194-208_Ford_LSG875_460CID_Engine_Service_manual_Apr1992.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.