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Matt
Matt, Mechanical Engineer
Category: Mercedes
Satisfied Customers: 21630
Experience:  BEng hons Mech engineering, in auto industry 22 years
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1.7 diesel runs smooth and sweet but rattles on tick over,no

Customer Question

1.7 diesel runs smooth and sweet but rattles on tick over,no loss of power(a class) on 03 plate
Submitted: 3 years ago.
Category: Mercedes
Expert:  Shantal-Mod replied 3 years ago.
Hello,

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Customer: replied 3 years ago.

No answer from an expert yet...

Expert:  Matt replied 3 years ago.


Hello

if you're getting rattle / combustion noise then its worth considering a bottle of injector cleaner into the tank as a clogged injector nozzle will reduce power and give poor combustion - the next stage on from this is to remove all the injectors and have them ultrasonically cleaned and flow checked

also check the connections to the EGR valve, if either the vacuum pipe of electrical connection are damaged / corroded then the EGR can be on all time which certainly will hurt performance. Its also possible that its a fault with the EGR valve so its worth removing the valve and cleaning it out with brake cleaner, if it looks particularly clogged then replace it.

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