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I have a loud knock on my Mercedes MBE 4000 engine.. Did a

Customer Question
Dyno and nothing, tried to...
I have a loud knock on my Mercedes MBE 4000 engine.. Did a Dyno and nothing, tried to run an additive to clean out injectors nothing.. Truck runs fine, no power lost, not running hot, oil pressure still good, no excess smoke, just a loud knock coming from under the engine annoyimg
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Submitted: 1 year ago.Category: Medium and Heavy Trucks
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Answered in 8 minutes by:
7/9/2016
Technician: Jeremy, Certified Truck/Bus Technician replied 1 year ago
Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 3,488
Experience: ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
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My name is ***** ***** I will assist you with your question today.

I'm an independent contractor and I don't get paid until a rating has been made.

We can go back and forth as needed to help resolve the issue you are having. Follow ups are free after ratings, so rate in confidence!

Worn valve spring. You are completely describing that. I would have them looked at before you drop the valve completely and wipe out the cam or the engine.

You are describing a near text book sound for that with the symptoms you have.

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Jeremy
Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
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