Intake and exhaust manifolds — inspection (Peugeot 305)

1. The intake manifold is connected to the cylinder head by 4 short hoses, which we recommend replacing when overhauling the engine. The clamps on these hoses must be in good condition. If there is the slightest doubt, they should be replaced to avoid problems with a too lean mixture later. Check the contact surface of the carburetor for distortion and defects and flush the water jacket channels in the manifold with clean water.

2. Inspect the exhaust manifold for cracks and obvious damage. Using a ruler, check the surfaces in contact with the cylinder head for warpage. If there are pits or unevenness, re-grinding of the contact surfaces may be required (produced in the workshop). If the defects are too significant, the manifold must be replaced. Carbon deposits are removed from the exhaust manifold using a flexible wire or scraper.