Which is better the Subaru EJ25 or the FB25?
There are the new intake manifold and lightweight exhaust system. The FB25 engine is more responsive at lower engine speeds compare to EJ25. It has the same power but lower rpm and increased torque at lower rpm. The fuel efficiency of the FB25 is a way better than the EJ25.
What kind of timing chain does a Subaru FB25 have?
The all FB25 engines have maintenance free timing chains. The exhaust system was tuned and got new manifolds and diameters of tubes to improve catalytic converter warm-up and to give more performance for the engine. The engine was slightly modified in 2014.
What do I need to tighten head bolts on Subaru 2.5L?
You will need both inch and foot pound torque wrenches as well as a torque angle gauge. Clean the cylinder heads and the block mating surfaces thoroughly with lacquer thinner or acetone.
What’s the compression ratio on a Subaru FB25?
The FB25 engine got new pistons for reducing the friction inside the block and getting down the compression ratio to 10.0:1. The aluminum FB heads consist of two pieces – the cylinder head itself and the camshaft carrier. That allows a reduction in metal thickness and weight. The heads are DOHC with four valves per cylinder.
There are the new intake manifold and lightweight exhaust system. The FB25 engine is more responsive at lower engine speeds compare to EJ25. It has the same power but lower rpm and increased torque at lower rpm. The fuel efficiency of the FB25 is a way better than the EJ25.
You will need both inch and foot pound torque wrenches as well as a torque angle gauge. Clean the cylinder heads and the block mating surfaces thoroughly with lacquer thinner or acetone.
The all FB25 engines have maintenance free timing chains. The exhaust system was tuned and got new manifolds and diameters of tubes to improve catalytic converter warm-up and to give more performance for the engine. The engine was slightly modified in 2014.
How to break in a Subaru FB25 engine?
Heres my personal break-in process: 1-Change oil to conventional or a high Zinc formula right away, and drive using about 3/4 throttle and some deceleration in gear (or in “L”) for 500 miles. 2-Change the oil again at 1000 miles (conventional oil is cheap), and reset the fuel trims.