Cold start up noise

phillypoet313

Original poster
Member
Dec 23, 2012
5
Just bought a 2002 trailblazer ls with i6 4.2, I have a few questions...if any member can help.

1) How to reduce the valve tap noise associated with these motors that occurs in the (cold) morning? I've changed the oil to mobil 1 synthetic and a premium filter.

2) How to get better gas mileage? I changed the plugs, air/fuel filter and checked tire pressure.

3) I have 100,000 miles, should I change oil weight/brand?
 

Wooluf1952

Member
Nov 20, 2011
2,663
Milwaukee, Wisconsin
It's recommended to start just one thread per problem.
It keeps all answers in one place.
 

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