ENGINE TRANSPLANTS WORTH THE EFFORT?
While an engine transplant may be a viable and cost-effective way to extend the useful life of a vehicle, or enhance its performance (with some reservations), in the following two cases we have our doubts if it is the best idea, as both cars are potential classics:
MERCEDES-BENZ SL UPGRADE
I’m struggling to find some info on a conversion that I am doing research on and would greatly appreciate if you could provide me with some advice (I have emailed Mercedes-benz’s head office, but have not received a reply). I am currently living in Australia and am well within reach of my dream car, a late-1990s MercedesBenz SL500 (R129). The main problem, however, is that there are very few SL500S available locally. The few imports are too expensive, in my opinion. My idea is to convert an SL280 or SL320 to an SL500, as I have a background as a Mercedes-benz mechanic and also worked in a machine/engineering shop. There are plenty of these around that are in good condition, with low mileage and in the colour I prefer. In order to do the conversion, I need to get the following components and solve these problems: • M119 engine and gearbox. • Propshaft and differential: do I need to
change the hubs for the half shafts? • Engine control unit: do I have to change
anything in the dash? • Are the brakes similar, including the ABS
unit, or should I source those as well? • Do I need steering and suspension changes?
Could you point me in the direction of someone with technical knowledge on the said conversion, and is it wise from a financial point of view? CORNAY GIBSON Australia Glad to hear you are still reading CAR while living in Australia. Unfortunately, we do not have a
contact for you regarding the Mercedes-benz engine conversion. Our gut feel, however, is that the proposed project is not worth the effort from a financial, time and technical point of view, because:
• The cost of such a project can easily spiral out of control and you might end up spending the same amount as you would buying an SL500 (even an import).
• Your questions consider a few technical issues, but we are certain there will be many more once you start the project, including the cooling system, getting the electronic modules to communicate with each other (for example, the ECU, ABS and instrument cluster) and not to mention the coded keys.
• Even if the rebuild is successful, the car will never be a true SL500 from an investment point of view (chassis and engine numbers do not match, etc.), and it will be classed as a “rebuilt”. Therefore, chances are that you might never get your money back on the project. We propose that you either save up and buy a standard SL500, even if at a premium price, as it should carry that premium forward. If you still want to tinker, search for one that needs attention and spend the effort to get it back in top shape. Even buy a SL320 and work on that while saving and looking out for your dream machine. But, if you’re still up for the challenge, we say ignore our advice and have fun...
FORD ESCORT CONVERSION
I own a 1979 Ford Escort 1600 panel van with rear-wheel drive. I plan to restore the vehicle, but want to fit a more modern engine, preferably petrol-driven and with a five-speed gearbox. Do you know which Ford (or other) engine and gearbox can be fitted without major alterations? FRED Via email Old Escorts have become rare and collectable, mainly owing to demand from the UK. We suggest you rather spend money on returning it to an original condition. If you’re still interested in a conversion and plan to use the vehicle daily, stick to Ford components.
The first option is a Pinto engine and gearbox from the Sierra range (1,6- and 2,0-litre). They’re carburetted and simpler to install. A modern option is the Rocam (1,3and 1,6-litre) found in the Bantam bakkie range, but speak to an expert, as the change to fuel injection and ECU might be complex. The cost of a conversion can skyrocket if the tech challenges aren’t understood.