The 2AZ-FE is a 2.4 L (2362 cc) version built in Japan and at TMMK in the USA, obtains a total displacement of 2362 cc with 88.5 mm (3.5 in) bore and 96.0 mm (3.8 in) stroke, with a compression ratio of 9.6:1. Output is 157 to 160 hp (117 to 120 kW) at 5600 rpm with 162 lb·ft (220 N·m) of torque at 4000 rpm.
Later versions of the 2AZ-FE engine were upgraded with 9.8:1 compression ratio, a slightly more aggressive intake cam profile, 6500 rpm red line, and piston oil squirters. These later versions are rated at 161 hp (120 kW) in the Scion tC, 166 hp (124 kW) in the Rav4, and 158 hp (118 kW) in the Camry, Corolla XRS, and Scion xB. However, it may be pertinent to note that these latter 2AZ-FE models were the first to be rated under the new SAE J1349 standard. The new standard usually produces more conservative numbers, though no definitive comparison is available since the two versions were never tested by the same standard.
Reports are surfacing on the internet of problems with head-bolts (not typically a part that wears-out) becoming stripped out of the aluminum block in the 2AZ-FE engine, including but perhaps not limited to the Toyota RAV4 and Toyota Camry. Compounding the problem, according to these internet claims Toyota is not acknowledging and repairing what owners think is an obvious design problem beyond the engine warranty. The problem begins when coolant level begins to drop and on investigation a coolant leak is discovered on the intake side of the block where a piece of foam is installed, evidently to shield the plastic intake manifold from heat. When the problem is investigated, it is typically reported that three head-bolts located at this area of the engine may be pulled-out with very little effort, practically by hand. Since the threads in the block are stripped, the head-bolts cannot be simply tightened. Left unimpaired, catastrophic engine failure may result. This apparent design flaw is a very costly repair that may appear after the warranty has expired. Adding to the gravity of the problem, owners are reporting that Toyota is not offering a solution other than the vehicle owner paying Toyota dealers $3000.00 (USD) or more to replace the engine block, or "very limited" assistance, especially if the owner has chose to perform scheduled maintenance on the vehicle him or herself rather than paying a Toyota Dealer's Service Department to do so resulting in that owner's lack of loyalty being taken into consideration. The exact range of specific engines and models that may develop this problem is not apparent without more information being released, and that may become available as more and more people report problems. A cottage industry is sprouting with repair kits being sold for over $300.00 (USD) to tap-out and install threaded inserts. This is reportedly a complicated three-day repair that requires installing additional gaskets and/or parts at further cost.
A TRD supercharger was available for the Scion tC until Spring 2009.
Applications:
- 2000-2003 Lexus RX
- 2002–2009 Toyota Camry
- 2009–2011 Toyota Matrix S (USA)/XR (Canada)/XRS
- 2009–2010 Pontiac Vibe
- 2009–2012 Toyota Corolla XRS
- 2002–2008 Toyota Camry Solara
- 2004–2008 Toyota RAV4
- 2001–2007 Toyota Highlander/Kluger/Harrier
- Toyota Estima / Toyota Ipsum / Toyota Previa / Toyota Tarago
- Toyota Alphard
- Toyota Blade
- Toyota Avensis
- 2005–2010 Scion tC
- 2008–2012 Scion xB
Read more about this topic: Toyota AZ Engine