Leakdown testing
Thread Starter
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Joined: Jun 2017
Posts: 127
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E550
Leakdown testing
I've performed a leakdown test on my previous non Mercedes car several times.
It had a manual transmission; keeping the engine from spinning when applying pressure to the cylinder was not a big deal even if the piston wasn't at TDC completely. All I had to do is put it in top gear (6th in this case) and make sure the wheels were choked. The car wouldn't move and performing a leakdown test was easy.
I've never performed one on a car with an automatic transmission.
What steps do I need to take to perform a leakdown on my 2010 E550 (M273 engine) ?
It had a manual transmission; keeping the engine from spinning when applying pressure to the cylinder was not a big deal even if the piston wasn't at TDC completely. All I had to do is put it in top gear (6th in this case) and make sure the wheels were choked. The car wouldn't move and performing a leakdown test was easy.
I've never performed one on a car with an automatic transmission.
What steps do I need to take to perform a leakdown on my 2010 E550 (M273 engine) ?
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Joined: Jan 2014
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'99 and '05 E55 AMG
Drop the plate under the flywheel and use a pry bar to lock the flywheel in place. May take a bit of work to figure out how to keep the bar in place but it it do-able.
Alternatively, place a breaker bar and socket on the harmonic balancer bolt on the end of the crankshaft. You're not going to be applying enough torque to worry about loosening it.
Alternatively, place a breaker bar and socket on the harmonic balancer bolt on the end of the crankshaft. You're not going to be applying enough torque to worry about loosening it.
Thread Starter
Member
Joined: Jun 2017
Posts: 127
Likes: 31
E550
With the manual transmission cars that I've done, it was just a matter of putting it in the highest gear and choking the wheels.
