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Along with head gasket failure, one of the least reliable parts of the early petrol engine was the exhaust valve, which tended to fail by overheating. A monobloc head could provide good water cooling, thus reduced valve wear, as it could extend the water jacket uninterrupted around both head and cylinder.
Another reason for the engine's success was its reliability. Its monobloc construction made it immune to head gasket or cylinder stud problems, and allowed for higher cylinder pressures. [8] [9] From 1934 through the 1970s, the Offenhauser engine dominated American open-wheel racing, winning the Indianapolis 500 27 times.
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 ...
Head gaskets deal with a lot more abuse than you might expect. It's a miracle they last as long as they do.
A 322 cu in (5.3 L) "monobloc engine" was used in the 1936 Series 60. It was designed to be the company's next-generation powerplant at reduced cost from the 353 and Cadillac V12. The monobloc's cylinders and crankcase were cast as a single unit, [4] and it used hydraulic valve lifters for durability. This design allowed the creation of the mid ...
When the center carburetor was opened to 60° or more engine vacuum drawn from the windshield wiper pump would simultaneously open the front and rear carburetors. These carburetors did not open progressively; they were either open or closed. The J-2 engine also had a slightly thinner head gasket, raising compression to 10.0:1.
The head, however, was detachable, which not only aided Ford in manufacturing but also made valve jobs (cleaning, grinding, or replacement of the poppet valves) easier. The block and head were both of cast iron. The engine's bore was 3 + 3 ⁄ 4 inches (95.25 mm) and its stroke was 4 inches (101.6 mm) even, for a total displacement of 177 cu in ...
The supercharged Aston Martin had been running surprisingly well all race until just after midday when a head-gasket failure caused its retirement. Around 1pm a ferocious squall slowed all the cars to a snail's pace, then the Jaguar drivers began to close the gap again on Trintignant as the track dried.