Originally Posted by Rat407
My 2002 Silverado had the cold start knock, (that is what it was called back then) since new and at 194k miles it is just as loud and not issues at all. To me the engine design isn't the best but it doesn't effect the integrity of the engine one bit.
Originally Posted by PowerSurge
The rattle is there because of timing chain stretch. Oil viscosity isn't going to help. Ford will probably need to replace the chains, tensioners and phasers on that engine.
And there is the difference. The GM LS engines of the early 2000's had a short skirt piston that was prone to noise, slap, etc but didn't seem to cause any long term issues. Since FOMOCO builds almost all their engines with miles of chains and guides for their OHC design the Ford design is a problem that will most likely cause issues if left alone. Noise yes, but root causes are apples and oranges.