Enough about philosophy and on with the show....
BMW M50B20 (520i). Before:
A long time ago, in a galaxy far far away.....
Wait, wrong story. I bought the BMW E34 520i in early 2007 and have tried my best to keep to its German heritage by replacing and repairing the car with only original BMW parts. I had just spend a small fortune (to me at least) to fully refurbish the gearbox (which was giving me problems) with the intention of keeping the car in stock condition for as long as possible. Unfortunately, fate had other ideas and my M50B20 engine decided to blow its top and thought mixing engine oil and coolant together would be a good idea.
This was the last straw and after finding out that a good condition M50B20 was difficult to come by and that the more readily available M50B25 (from a 525i) would cost a small fortune (to me at least), I decided that it was time for a change. After much thought and research, I decided to go with the Toyota 1JZ-GTE Twin Turbo as the engine (or halfcut as we call them in Malaysia) were about a third of the price of the BMW and after factoring in the massive amount of labor and fabrication to install a Toyota engine into a BMW, the total cost was still quite similar.
So a date was scheduled for the open heart surgery and the car was trailered to the operating theater and the offending item was removed.
The oil sump of the 'new' engine had to be modified to fit the original BMW engine bay.
The new heart being fitted.
While the car was in for surgery, I decided to get the wheels repainted to an anthracite grey.
I also custom fabricated a panel for the boost gauge and turbo timer. Finished off with a 3M Carbon-Fiber sticker.
One of the requirements I had for the transplant was that I wanted the engine bay to look as 'stock' as possible, like it would have looked if BMW and Toyota decided to get married and have a child. As such, a lot of care was given especially to the wiring and the use of the original Toyota air intake assembly.
Overall, I am really happy with the results and the 280hp that came with it.
Some pictures after surgery.
The standard 520i exhaust was used for the complete 'stock' look. I didn't want to go for a custom made exhaust as I wanted it to look and sound like a stock BMW 520i.
The completed engine bay.
The original BMW gear shift was reused and the panel for the boost gauge and turbo timer installed.
The original BMW instrument cluster was also reused and everything works expect the meter below the rev counter used to calculate the MPG.
Some exterior shots of the car with the wheels. For a full description of the detailing work carried out check out my post on my other blog:
The new Japanese heart is smoother and definitely much, much more powerful than the original German heart but what I'm really hoping for is that it will be more reliable also.
My wallet needs a break...... or I'll be the one needing a heart transplant soon.
Just updated another post with some technical information about the 1JZ: