Question about 2004 Chevrolet Silverado
Sounds like a worn big end bearing. Not a disaster as you have caught it early. Drain engine of oil and remove pan. Remove spark plugs and disconnect battery. Undo big ends, fit new bearings, refit the big ends and tighten to specified torque. Might be an idea to also replace main bearings as a preventative measure whilst everything is open. The main journals on the crank are probably fine. Check the journal facings of the removed bearings and determine not only how much wear but the wear type. I would try using 5-40 (or 5 -50) fully synthetic multigrade oil but not change it so frequently (15K is plenty). These oils are thin when cold and help avoid high shear forces within the bearings at cold temperatures whilst keeping a good viscosity at high running temperatures - good for the more mature engine. Because they are fully synthetic they keep their properties for a very long time. Good luck
Posted on May 01, 2010
Sounds like your hydroilc lifters(cam followers) are on the way out
Posted on May 02, 2010
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Posted on Jan 02, 2017
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