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The Toyota GR engine family is a gasoline, open-deck, piston V6 engine series. The GR series has a 60° die-cast aluminium block and aluminium DOHC cylinder heads.This engine series also features 4 valves per cylinder, forged steel connecting rods and crankshaft, one-piece cast camshafts, a timing chain, [1] and a cast aluminium lower intake manifold.
Toyota swapped the dual-row timing chain used in older engines for a single-row chain with plastic guides in 1983. The new system reduced drag on the engine but introduced a new maintenance problem. After about 100,000 miles (160,000 km) of operation, the chain may stretch to the point that the hydraulic-operated chain tensioner cannot take up ...
Furthermore, in engines where the timing belt drives the water pump, failure of the water pump can cause the pump to seize, which can break the timing belt or chain. For this reason, timing belts and chains are often sold as part of a kit with the water pump, tensioner, and idler pulleys so that these parts can be replaced to prevent timing ...
The Toyota T series is a family of inline-4 automobile engines manufactured by Toyota beginning in 1970 and ending in 1985. It started as a pushrod overhead valve (OHV) design and later performance oriented twin cam ( DOHC ) variants were added to the lineup.
Timing Chain: Compression ratio: 9.5:1–13.4:1 (hybrid) ... and sold officially as complete car at Toyota dealers. The turbocharger kits is also available for sale ...
This new engine uses a timing chain instead of a timing belt. It also incorporated laser etched valve guides directly in the block, rather than the old shrink-to-fit valve guides in the preceding Corolla motors (4A-FE & 7A-FE). This prevents oil burning and valve guide failure in the future.
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