mbmb

On an E55, if the valve lifters are replaced, what are the chances that the engine's balancing will be affected?

That is, what is the chance that the balance might be thrown off by a replacement lifter that weighs more or less than the lifter it replaces?

If the dealership replaced the lifters, do I need to insist that they send the parts off to be rebalanced? Or am I being paranoid?

JamE55

I would think that depending on who is doing the valve replacements if that person or shop knows what they're doing you should be ok and not be worried about the engines balancing or blueprints.

awiner

This brings up an excellent point. AMG enignes are balanced and blueprinted from the factory. Valves and lifters should be no problem replacing. If youy needed to replace a cam than a balanced set would be required to keep the engine blanced.

E55MKB

Replacing hydraulic lifters does not affect a balanced engine.

Balanced engine means that the piston, ring, connecting rod of every cylinder are within a certain range of weight to each other. The closer the tolerance, the more balanced the engine. The crankshaft might also get a balancing treatment or blueprinting to the extent of sharpening the part which hit the oil when engine is turning (to reduce drag mainly).

Replacing the camshaft with another AMG cam should and will not alter the balance of the engine, neither would replacing the hydraulic valve lifters!!!!!

E55MKB

Yes MBMB, to answer your question, you are being paranoid.

mbmb

Good. Thank you.