From this post forward, Project FC RX-7 will be referred to as Project LSX-7.
After purchasing the L33 engine, numerous parts were required to make it fit in the RX-7. The search began by looking for accessories and an oil pan from an F-body (1998-2002 Camaro/Firebird). After searching for nearly a week on LS1Tech and Seattle/Vancouver Craigslist, a blown LS1 engine from a 2004 GTO was found in Canada. The ad description was minimal and didn’t include photos but I decided to email the seller anyway. I asked if the intake manifold and accessories were included and he sent me photos which showed the water pump, crank pulley, and oil pan. I made arrangements to pickup the engine after work.
Matt K. (v8rx7guy) and I were somewhat disappointed when we arrived and found 241 heads. We had read online that GTO’s came with better heads which would be worth more money. Just as the photos showed, the accessories were still installed on the engine which meant that it was still worth buying. While preparing to load it into the truck, the seller mentioned that the previous owner had swapped in an aftermarket cam. We contained our excitement until we got back into the truck because this most likely meant that the engine had more aftermarket parts.
Once the engine was back in the shop, the valve covers were pulled. Inside we found dual valve springs and hardened chromoly pushrods!
We returned a couple of days later with the proper tools and removed the crank pulley and timing cover. Inside an aftermarket oil pump was found which is a common upgrade when swapping in an aggressive cam. The cam was removed and the first sign of the blown engine was found. Deep gouges could be seen on numerous lobes. This was unfortunate because I was considering running the cam if it was fine.
We continued disassembling the long block. Both heads were removed and the crankshaft was inspected. The seller mentioned that his mechanic pulled the oil pan and found an issue with the crankshaft. This prompted him to recommend a replacement engine.
We removed the bottom of the crank bearing and found that the surface was slightly rough to the touch.
Overall, this was an ideal way to buy the accessories I needed. I was able to teardown the engine and intimately learn my way around an LSX engine (with the help of Matt K.). I also obtained some valuable parts in the process and a spare short block (not including the crank) that can be rebuilt in the future.
Parts that will be used on the L33:
Crank pulley
Water pump
Low-profile LS6 valley cover
Block heater plug
Parts sold to fund the project:
Complete 241 heads with aftermarket dual valve springs and hardened pushrods
Stock rockers/rails
Aftermarket oil pump
GTO oil pan, pickup tube and windage tray (used for 240SX/BMW LS swaps)
Misc. sensors
Previous posts about Project V8 RX-7:
Update 5 – 5.3L Engine Purchase
Update 4 – The New Shop
Update 3 – Drivetrain Choices
Update 2 – Interior and Wiring
Update 1 – Engine Bay Preparation
Introduction to the Project