Genuine 1985 Pontiac Firebird Cylinder Head

1985 Pontiac Firebird Parts Questions & Experts Answers

• Q: How should the Cylinder Head be prepared for reassembly after valve servicing on 1985 Pontiac Firebird?

  A: Regardless of whether the head was sent to an automotive machine shop for valve servicing, ensure it is clean before beginning reassembly. If the head was sent out for valve servicing, the valves and related components will already be in place, so start the reassembly procedure accordingly. Lay all the spring seats in position, then lubricate and install new seals or deflectors on each of the valve guides for V6 intake valves and all VS valves. Using a hammer and an appropriately sized deep socket, gently tap each seal into place until it is properly seated on the guide, avoiding any twisting or cocking during installation to ensure a proper seal on the valve stems. Coat the valve stems with clean moly-based grease or engine assembly lube and install the valves, taking care not to damage the new valve guide seals. Install the springs, shields if equipped, and retainers or rotators, ensuring that if the valve springs are wound closer at one end, they are installed correctly. Compress the spring and install the O-ring seals in the lower valve stem groove, ensuring they are not twisted, with a light coat of oil to prevent twisting. When compressing the springs with the valve spring compressor, avoid letting the retainers contact the valve guide seals. Install the keepers and release the spring compressor, ensuring the keepers are securely locked in their retaining grooves by tapping on the spring retainer with a soft-faced hammer. Double-check the installed valve spring height; if it was correct before disassembly, it should still be within the specified limits. Check the valve stem O-ring seals with a vacuum pump and adapter to ensure a properly installed seal does not leak. When installing the rocker arms, lubricate the ball pivots with moly-based grease or engine assembly lube.