Chrysler Magnum 5.2L and 5.9L V8 Engines Performer RPM Cylinder Heads PDF Installation Instructions

Prior to installation it is highly recommended that valve-to-piston clearances are checked and corrected to minimum specs if necessary. These heads have larger than stock valve sizes and may not work with the valve pockets in stock pistons, especially if a high lift camshaft is used. The use of aftermarket pistons and/or custom machining to your pistons may be required. Actual valve-to-piston clearance should be specified by your camshaft manufacturer. If these heads are used on small bore engines, valve-to-bore clearance should also be checked, and the top of the bore notched for clearance if necessary.

ACCESSORIES Although Edelbrock Cylinder Heads will accept most OEM components (valve covers, intake manifold, etc.), we highly recommend that premium quality hardware be used with our heads. Head Bolts or Studs: High quality head studs or head bolts with hardened washers must be used to prevent galling of the aluminum bolt bosses. Edelbrock Head Bolt Kit #8577 is recommended. Other aftermarket bolt kits may be used if they are intended to be used with hardened washers. Stock bolts are not recommended, as they do not provide proper thread engagement when used with hardened head bolt washers.

Rocker Arms & Valve Train: Adjustable rocker arms must be used. These heads are assembled with 3/8” rocker studs and will not accept factory pedestal mount rocker arms. A high performance, stud mounted roller rocker arm is recommended for use with these heads, such as Crane Cams #11759-16, or Comp Cams #1302-16. These rocker arms are listed as 1.6:1 ratio for use on Small Block Chevy V8s with 3/8” rocker studs. Valve cover modification may be required with the use of roller rockers (See Valve Covers section below). Valve Covers: Edelbrock Performer RPM heads accept stock valve covers for the year and model for which they are listed. When using roller rockers with these heads, the stock valve covers may need to be spaced up about 3/8” with extra thick valve cover gaskets, or by laminating multiple gaskets together using silicone sealer or gasket adhesive. Aftermarket valve covers are recommended, such as Mopar Performance #P5249343 (Black Wrinkle Finish) or P4876041 (Polished Finish) cast aluminum valve covers.

Intake Manifold: Although stock intake manifolds will fit, Edelbrock Performer RPM cylinder heads are matched in size and operating range with the Edelbrock RPM-Air Gap manifold #7577. The #7577 is a carbureted manifold designed to be used when using a Magnum 5.2L or 5.9L engine in non-emissions, engine swap applications in early model vehicles. Exhaust Headers: Any header or exhaust manifold designed for original equipment cylinder heads will fit Edelbrock Performer RPM Chrysler Magnum cylinder heads. The exhaust ports are CNC profiled to match Mopar Performance #P4876102 exhaust gaskets which are recommended for this application. Spark Plugs: Use 14mm x 3/4” reach, gasketed spark plugs. Heat range may vary by application, but we recommend Champion RC-12YC (or equivalent) for most applications. Use anti-seize on the spark plug threads to prevent galling in the cylinder head, and torque to 10 ft./lbs. Do not overtighten spark plugs! • INSTALLATION Installation is the same as for original equipment cylinder heads. Consult a service manual for specific procedures, if necessary. Be sure that the surface of the block and the surface of the head is thoroughly cleaned to remove any oily flim before installation. Use alcohol or lacquer thinner on a lint-free rag to clean. Apply oil suitable thread lubricant to head bolt threads and the under side of bolt heads and washers. Torque bolts to 95 ft/lbs in three steps (45-65-95), following the factory tightening sequence (See Figure 1). A retorque is recommended after initial start-up and cool-down (allow 2-3 hours for adequate cooling).

Download Chrysler Magnum 5.2L & 5.9L V8 Engines Performer RPM Cylinder Heads PDF Installation Instructions