Q: can i put a turbo on my 4.2L V8? and if i can what would it take to do it?

asked by on February 28, 2017

im buying a E420 with a 4.2L V8 and i want to put a turbo under the hood, im not very motor savy and am not sure if i can do this, and if i can what its going to take, price estimate, explanation on what needs to happen for it to work would be much appreciated
My car has an automatic transmission.

I’ve never put a turbocharger on a Mercedes V8, but I suppose with enough time and money, anything is possible. There are kits out there for turbocharging just about anything, including the Mercedes V8, but as with anything some are better than others, so you need to do a lot of homework. You might consider a belt driven supercharger instead of a turbocharger. There are some kits available, and installing a supercharger would mean you don’t have to mess around with the exhaust which is in very tight quarters. Installing the hardware can go pretty quickly, but as with any engineering project, the devil is in the details. If the engine is not in top condition, installing a turbo or a supercharger will bring out any faults very quickly. Boosting the intake puts a great deal of stress on the engine internals and with just a little too much boost, or if the fuel mixture is just a little too lean, you can trash a perfectly good engine in the blink of an eye. cars that were manufactured with turbos or superchargers have a lot of safety controls built in to keep this from happening, but they ruined a lot of engines in research and development coming up with these controls. You may find yourself in uncharted territory and toast an engine before you realize you have a problem. So good luck with your project! I would guess that it will cost more than the car you want to buy, But it sounds like a lot of fun!

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Transmission slipping while downshifting

The shifting may be normal, but there is a software update to change the shifting strategy. Take the vehicle to a dealer and they can update the software for you. If you are out of warranty, then there may be...

Loud clunking when shifting reverse. Is it the pressure switch?

Hello. It sounds like you either have a mount that is failing (https://www.yourmechanic.com/services/engine-mount-replacement) or you may have an issue with the valve body in the transmission. I have also seen the driveshaft (https://www.yourmechanic.com/services/driveshaft-replacement) make this noise where it enters the...

Steering wheel Issues - 2001 Hyundai Elantra

This problem is most likely caused by worn strut bearings. This component supports the weight of the vehicle at each front wheel, but also has to allowing turning of the wheels. When worn, the bearings tend to make noises when...

does defective ball joint affect the operation of alternator?

Your ball joint will have nothing to do with the alternator at all. The ball joint is part of the lower control arm of the vehicles suspension and steering. The alternator is mounted on the engine and is used to...

clutch stuck halfway.

Hello, the clutch system has a hydraulic and mechanical operation. You could have two issues. The hydraulics assist in releasing and applying the clutch. There is a pressure plate that reacts to the clutch pedal, if the pressure plate...

Not sure what to replace first on Front end suspension on lifted power wagon

Hi there: Honestly, everything you listed is urgent to be replaced at the same time if possible. Without physically inspecting your Dodge Ram 2500, it's impossible to give you a priority list that would be professional or a safe option....

I topped up engine coolant in my BMW E90 and now when I drive it's making a slight squeaking/ s reaching noise

Claimed by Jeff Engstrom

Passlock reset on 2002 Chevrolet Impala

Unfortunately the dealer is oftentimes the only place that can perform services such as this. This is due to the fact that specific scan tools are required in order to reset certain systems.

Cylinder honing

Prior to honing, the cylinder has to be measured for any out-of-round condition. The service limit on out-of-round for your specific engine is .0005 inches. If out-of-round exceeds .0005 inches, which it probably does, the block has to be serviced...

Related articles

What Is Engine Displacement?
Engine displacement is the swept volume of pistons inside the cylinders. Displacement has an impact on increasing car power or fuel efficiency.
A Buyer’s Guide to the 2012 Mercedes-Benz SLS AMG
Powerful, Powerful, aggressive and streamlined, the 2012 Mercedes-Benz SLS AMG is a precision-crafted supercar. It was offered originally as a coupe, but this year saw the addition of a roadster body style. Key Features From the 7-speed dual clutch to...
Top Automotive News & Stories: September 24-September 30
Angry Civic Type R, 350 special edition Ferraris, Infiniti variable compression tech, Mercedes' electric future, and more.