[diesel_mercedes] Re : newbie valve adjustment questions

 

Tight (lessthan .002" ) valves will BURN ~ this is a very bad thing so take the time to get them right .

Tight valves also are the primary cause of hard starting .

Loose valves cause loss of power and excessive noise .

Using bent 14MM open end wrenches is the smart thing to do , you can buy them OnLine for less than the cost of having the Mercedes Garage do one adjustment the re use them as this important adjustment needs doing at least once a year .

-Nate
Rodger Asked :

>
> Hello all
>
> My understanding is that intake valves should have .004 inch clearance and exhaust valves .012 inch clearance (1978 300D)
>
> Two questions:
> 1. can intake valves being under .002 inch ( I do not have a .001 gauge)
> and exhaust valves being over .014 inch cause overheating?
>
> 2. Can the adjustment be made when the cam is not STRAIGHT UP ?
> I am using the starter to rotate the engine.
>
> thank you
> Rodger
>

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