$4,000 to $6,000 – A proper Mazda RX8 engine overhaul costs that amount. The service includes a fully restored engine with some upgrades for high performance and longer life.
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On average, it costs about $5,800 to hire a mechanic to rebuild your RX-8 engine and about $4,400 if you buy the parts and rebuild it yourself.
As with any engine, if you take the time to look after it properly, it will last longer than usual, but that can mean 80,000 miles or less.
Rebuilding a rotary engine is actually quite easy, much easier than rebuilding a traditional piston engine, basically you build from the bottom up by laying parts on top of each other.
These apex seals also typically don’t last long before they need to be replaced. Rebuilding a Wankel at 80,000-100,000 miles is typical and earlier than most piston engines require such exhausting work.
Four cylinders will also be swapped into the RX-8. The renowned SR20DET is a popular choice for the RX-8. People have even traded other rotators into the RX-8, either from the RX-7 or a custom 3-rotor. Then there are some weird swaps that generally require a lot more knowledge and skill to pull off.
Poor fuel consumption & Usability
Another reason the RX8 is cheap to buy now is that many are put off by the car’s poor fuel economy. Rotary engines may be small (and produce considerable power for their size), but they tend to be thirsty.
Since the RX-8 hasn’t changed much over its seven year life, we recommend a 2010 or newer model due to the improvements to the engine that greatly reduce bumps and flooding, and most importantly oil consumption .
The Mazda RX8 is a great car it sounds great and looks great too. It’s comfortable for a sports car and so much fun to drive. Reliability is below average, but not terrible. It is also not very expensive to repair the car.
Problem: The RX-8 has the unique rotary engine and this version of the rotary engine has proven to be highly unreliable, especially after 60,000 miles. Warranty companies say Mazda has unofficially said that after 60,000 miles these engines become unreliable and prone to problems.
It is powered by the RENESIS 13B-MSP Wankel engine (2 rotors, multi-side port) with a displacement of 1.3 l (1,308 cm³).
You’re unlikely to see more than a few horsepower more from an N/A engine, but several RX-8s out there achieve over 450hp after a turbo upgrade. Because of this, it hasn’t stopped many RX-8 enthusiasts from continuing with their turbo upgrades and realizing the full potential that the Renesis really has to offer.
Rotary engines are notorious for being typically unreliable, but the problems are pretty easy to fix.
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