Chevy Truck Header instructions
Contents
1. 8 2 Litre Performance Parts Albuquerque New Mexico MID LENGTH HEADERS 73787 CHEVY 7 GMC TRUCK Observe all standard automotive repair safety precautions These can be found in the front of any service manual Recommended installation supplies Gaskets 16 header bolts 1 long bolts recom mended NOT original manifold bolts collector bolts 6 ea 3 8 bolts and lock nuts NOT Nylock nuts header gaskets NOT silicone and collector gaskets usually pro vided by the exhaust shop but check with them before showing up Unless you have the facilities for bending welding exhaust at the location the head ers are being installed at plan to have the car towed to a facility where the exhaust will be hooked up Remove the stock exhaust manifolds and extract any bolts that break off Soaking them with a good penetrating oil several times over several days is recommended to reduce this hassle Chase all of the threads preferably with a thread chaser instead of a tap Note that 1 bolt hole per port is open on the back side and 1 is a blind hole which backs up to a head bolt be careful not to damage the head bolts Cut back the exhaust far enough it is out of the way Check your starter heat shield If it is missing install one Install the headers Nothing fancy on 1 2 ton trucks On 3 4 ton and larger trucks the frame rails are actually wider and header clearance is tighter You may or may not have to cut grind trim the inner e2. dge of the top of the frame rail slightly for clearance Just like BB Chevy headers require only less trimming is required Hook up the exhaust and enjoy Warning running the car with open headers open manifolds open heads could start a fire Our local exhaust guy has had several cus tomers cars totaled because they tried to drive to his shop with open exhaust Also running the engine with nothing bolted to the exhaust ports can cause engine damage in some cases If you purchased ceramic coated headers or have them coated yourself the coating will dull tarnish over time Most coating companies recommend using an aluminum pol ish such as that marketed by Mothers to bring back the shine If you are using un coated headers we do NOT recommend header wrap as it will usually cause the head ers to rust out Thank you for choosing Cad Company s Best Engineered Parts for the Cadillac 472 500 and 425 engines Feel free to call with any questions or suggestions
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