Some details of the 2AZ-FE engine

Built_Well · 2008-07-15T03:08:50+00:00

Gonna write this stuff down and post it so I don't lose it. Had to wade through a lot of pages to find it. The 5th Generation Camry's 2AZ-FE engine (an advanced powerplant, by the way) is the same engine that was used in the '01 Highlander SUV. 5th Generation Camrys cover Model Years '02 - '06. The cylinder block is made of aluminum alloy. It uses aluminum pistons, high-strength steel connecting rods and caps, forged steel crankshaft, and, IIRC aluminum camshafts. The VVT-i only works on the intake camshaft, not the exhaust camshaft. It varies the timing of the intake valves. There are two intake valves per cylinder and two exhaust valves per cylinder. Having two of each increases the total port area, so more air can flow into and out of the combustion chamber. As the manual's authors write, "Intake and exhaust efficiency has been increased due to the larger total port areas." The cylinder head cover (not to be confused with the cylinder head) is made of magnesium alloy for lighter weight. I think cylinder head cover is synonymous with "valve cover," but the Camry manual refers to it as the "cylinder head cover." Since the manual doesn't mention what the cylinder head, itself, is made of, I will assume iron, but just an assumption. The cylinder head gasket, used between the aluminum engine block and the (iron?) cylinder head is a steel-laminate type of material. Any concern about electrolysis taking place between the steel-laminate and aluminum? When the service and repair manual says the dry weight of the engine is 267 pounds, does that include the crankcase, crank, cylinder head, and valve head with camshafts--or does the weight only include the engine block without crankcase and cyclinder head, etc.? The crankshaft and camshafts are connected by a timing chain, not a belt. The oil pump is located behind the timing chain cover at the front bottom of the engine, even lower than the crankshaft. The oil pump has its own short section of chain that's...

Jul 15, 2008 Last reply: 17 years ago 84 Replies

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Steve 17 years ago

I said "virtually" universally used, and that's true because roller-cam engines outnumber sliders at least 10:1 in the marketplace. One or two low-end Ford/Mazda engines do not a majority make, even if millions are sold. You can't debate the virtues of hydro lash adjusters without putting it in the context of roller vs. slider, because roller followers eliminate some of the presumed disadvantages of hydro lash adjusters. That was the only point I intended, and I don't think I disagreed with you either. IF you are constrained to a slider cam for cost reasons, then it makes sense to eliminate the lash adjusters too. Its "system" design thinking vs. "component" design thinking- what pieces work TOGETHER the best.

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Retired VIP 17 years ago

2006 Corolla has them. I think that's a late model Toyota.

Jack

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leemoore513 10 years ago

I just need the weigh of the botton end on head no timing cover block piston crank oil pan

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AMuzi 10 years ago

I have no idea but suppliers of rebuilt engines (who ship them all day long) would know.

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