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Diagram of an exhaust manifold from a Kia Rio. 1. manifold; 2. gasket; 3. nut; 4. heat shield; 5. heat shield bolt Ceramic-coated exhaust manifold on the side of a performance car. In automotive engineering, an exhaust manifold collects the exhaust gases from multiple cylinders into one pipe.
A leak in the head gasket - often called a "blown head gasket" - can result in a leak of coolant, the combustion gasses, or both. Blue smoke from the exhaust suggests that excess oil is entering the combustion chambers (although there are other possible causes than a head gasket leak). White smoke from the exhaust suggests that coolant is ...
The coil-in-cap HEI distributor was retired, and an all-new electronic distributor design was used. The intake manifold to head bolt pattern was redesigned to improve gasket integrity—four of the center intake manifold bolts were drilled at 72° instead of 90° for the cast iron cylinder heads. Changes to the valve covers were also made.
[8] [10] The oil pan was also made from thicker steel, and was installed with a more leak-resistant silicone-rubber gasket. Gasoline was supplied to the intake manifold through a pair of steel rails that fed eight Bosch-type, top-fed, electronically actuated fuel injectors; there was one injector located in each intake runner. [11]
The 1997-99 Camry 5S-FE continued with the air-assisted, 250 cc injectors. The Camry 5S-FE also had a factory 4-to-1 exhaust design - in Federal form, it had no pre-catalyst, although the California version did replace the collector design of the Federal version with a warm-up pre-catalyst for reduced cold start emissions. [citation needed]
Engine knock became a large problem; causing overheating that led to blown gaskets and damaged head bolts. [3] AMF tried to combat this by producing more units in 1976 despite the engine's problems, which ended up leading to a damaged employee reputation, along with seriously declined quality in their units. [5]