Astra G MK4 EGR Valve Cleaning For example timing belt broken. This item is in the category Vehicle Parts & Accessories\Car Parts\Engines & Engine Parts\Cylinder Heads & Head Covers. Vauxhall opel manta astra cavalier 1,8e cylinder head 8 valve gm 90209897 the seller is heads222 and is located in bilston, west midlands.