Genuine 1991 Chevrolet Metro Cylinder Head

1991 Chevrolet Metro Cylinder Head Parts Questions & Experts Answers

• Q:

  Is it more practical and economical for home mechanics to purchase replacement cylinder heads rather than disassembling and reconditioning the original ones on 1991 Chevrolet Metro?

  Posted by Zekai H.

  A:

  You can find brand new and re-created cylinder heads for almost any engine at both car shops and auto parts shops. Because home mechanics need special tools to take apart and check the engine block, and because replacement pieces might not be easy to get, it's usually cheaper and makes more sense to buy a new head instead of fixing the original one. We break down the cylinder head by removing the camshaft, intake and exhaust valves, putting each part in its right spot, labeled for easy identification. First, take off the timing belt sprocket, then unhook the camshaft along with the lifters on Metro models. We need to write down and keep all valve parts together in one place right before we remove the valves. That way, it will be straightforward for us to put them back in the exact same valve guides when we reinstall the engine later. Use a spring compressor tool to press down the valve's springs, let go of the compressor, and remove all three parts (retainer, spring, and spring seat if used). Step 1: Gently pull the valve from its position in the head, then carefully take the oil seal from its guide. When the valve gets stuck, try moving it back toward the head and smooth the keeper groove nearby with a sharpening stone or file. Keep all parts for each valve separate so you can easily put everything back in the right place later. After taking out and placing everything correctly, clean the head fully and check it over, to finish dismantling the engine (an entire rebuild) prior to the cylinder head cleaning and examination phase.

  Answered by GM Parts Specialist Raul / Jan 10, 2022