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Lift Dual Valve
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Toyota Engine Technical Specifications
2007 saw a major shift in the Toyota Tundra Engine lineup. Toyota went from two engines to three: the 5.7L 3UR-FE, the 4.7L 2UZ-FE, and the 4.0L 1GR-FE The last generation of Toyota Celica engines saw to 1.8L motors.
The eight cylinder 5.7L Toyota Tundra Engine is the largest Toyota engine in use in North America. This motor is DOHC with 32 valves, and makes use of dual VVT-I, which means the valve timing is variable both on the intake and exhaust valves. The bore size is 94mm and the stroke is 102mm. Should you need to replace this motor in your vehicle, I strongly recommend you buy a used engine, since a new one will set you back just under $20,000. There is unlikely to be a strong remanufacturing market for this engine, since the magnesium alloy head is difficult to work with. This engine is produced at Toyota's plant near Huntsville, AL.
The 2UZFE is a 4.7L Toyota Tundra engine also produced at the Huntsville plant. It also has a 94mm bore, but the stroke is reduce to 84mm. Again, we have a 32 valve DOHC. There is not dual VVT-I on this engine though – only variable valve timing. The 2UZFE utilizes a cast iron block and aluminum heads.
The 1GR-FE is a six cylinder, 32 valve DOHC 4.0L engine. This engine uses VVT-i, which mean that the valve on the intake cam is variable. Further, this engine cannot be bored out. Toyota has gone to an elliptical shape intake port. They claim that this is to reduce fuel consumption via more evenly distributed fuel, but the cynic in me feels that this is merely an attempt to make the engine nonrebuildable.
Getting into Toyota Celica engines, we first look at the 1ZZFE. This engine was built for US vehicles in Cambridge, Ontario, Canada and in Buffalo, West Virginia. It is a 1794 CC, 16 valve DOHC motor, with a bore of 79mm and a stroke of 84mm. All 2000-2005 GTs have the 1ZZFE. This engine utilizes a timing chain instead of a chain. A timing chain is considered to be of higher quality than a belt.
The upgrade of Toyota Celica engines is the 2ZZGE. Also a 16 valve DOHC engine, the bore is 82mm and the stroke is 85mm. Japanese produced only, this engine utilizes a 11.5:1 compression ratio requiring gasoline with a 91 octane minimum. This is a dual VVTL-i system, which means that the valve lift varies according to need on both the intake cams and the exhaust cams, greatly increasing performance.
Both Toyota Celica engines could be mated with either an automatic or manual transmission, though only the GTS could get the six speed manual transmission.
About the Author
Every Toyota Tundra engine I've encountered has been of the highest possible quality. The same goes for all Toyota Celica engines I've run into. Well maintained, these motors should run "forever."
Who has a SBC vacuum diagram?
I have a 78 Camaro. 350 V8 SBC, Edelbrock Performer intake, Holley 650 cfm carb, Flowtech headers by Holley, Cherry bomb glass pack dual exhaust directly bolted onto header collectors, and Comp cam with .470 lift.
The brakes (disc front and drum rear), rotors, and master cylinder / brake booster were recently replaced by a local shop. The car has a HARD break pedal with minimal stopping power which I suspect is due to vacuum lines improperly routed connected. Currently I have 1 vacuum line to the distributor. The other vacuum line is from brake booster to a T fitting, T fitting to PVC valve on valve cover and other hose to carb. What is the correct routing of vacuum lines OR other contributing factors to hard brake pedal and soft stopping power?
Please include experience in your answer. 10 points to best answer. All answers greatly appreciated.
I believe that the PCV valve should be routed to the air cleaner assembly, and the brake booster to the intake manifold. The only time that vacuum should be routed to the carb is on vacuum secondary carbs - in that case the carb is using vacuum but not creating it. If you have the PCV valve and brake booster both hooked up to the same vacuum source, then your vacuum system is badly messed up.
2011 Jeep Grand Cherokee
The Basics: The 2011 Jeep Grand Cherokee might be the best thing to emerge from the wreckage of the old DaimlerChrysler. When the companies divorced in 2007, Chrysler got custody of some of the pieces it needed to build a new sport-utility vehicle. It's the best Grand Cherokee yet—so much for broken homes. Fundamentally, you wouldn't recognize the...
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