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In an internal combustion engine, a head gasket provides the seal between the engine block and cylinder head(s). Its purpose is to seal the combustion gases within the cylinders and to avoid coolant or engine oil leaking into the cylinders. [1] Leaks in the head gasket can cause poor engine running and/or overheating.
The 20R head has straight ports, so can flow better than the 22R head, improving high RPM power. The 20R head is a simple bolt-on modification for the pre-1985 block, but also requires the use of the 20R intake manifold, making it almost impossible (there's a lot of matching necessary) to use with the 22R-E EFI system. [21]
For the 2013 model year (Generation 5), the 3.5 SR trim level was dropped completely for the coupe, meaning that for this particular model year, only the sedan was available with a 3.5 L V6, and 2013 is the last model year for the Altima Coupe, while the sedan gets redesigned for the 2013 model year and continues production for future model years.
All M family engines used a cast-iron block with an aluminum cylinder head, and were built at the Toyota Kamigo plant in Toyota City, Japan. The M-E variant, available only in the Japanese domestic market, was the first Toyota engine to be equipped with fuel injection (around the same time as the 4-cylinder 18R-E).
1ZR-FE in Toyota Corolla 1.6 . The Toyota 1ZR-FE is a DOHC, 16-valve, 1.6 L (1,598 cc) engine equipped with dual VVT-i.This engine is available with either manual gearbox (5 or 6 Speed), a "multi-mode" manual transmission (MM-T 5 Speed) or an automatic gearbox (4 Speed).