The Toyota 2AZ-FE Camry, Highlander, RAV4, and Solara 2.4L are DOHC engines.
Toyota 2AZ-FE VERSION
The 2AZ-FE is a 2.4 L (2362 cc) version built in Japan (Kamigo Plant and by Toyota Industries Corporation), at TMMK in the USA and also built in China for select Scion xB models, 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 160 hp (120 kW) at 5600 rpm;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, 177 hp (132 kW) in the Rav4, and 158 hp (118 kW) in the Camry, Corolla XRS, and Scion xB. However, 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.The Rav 4 uses a different timing chain cover than the Camry, they can however be interchanged.
Burning Oil Complaints
There have been complaints of this engine “burning oil” in North America with the issue starting after 45k miles, though mostly after 60k-75k miles. Piston ring design has been identified as a problem. Toyota has even issued a TSB (Technical service bulletin) TSB #0094-11 in August 2011 but have refused to issue general recall. Also more convincingly reported as a head gasket problem the 2AZ-FE aluminum block head bolt threads wear out on the back 3 middle bolts (closest to firewall). There are several class-action lawsuits underway regarding this widespread issue. In January 2015, Toyota North America caved in and issued extended warranty notification (ZE7) for this issue. However, Toyota still insists that burning 1 quart of oil every 1200 miles is “normal”. This applies to Toyota North America vehicles only.
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