Short ticking noise on cold start

[Trickster]

Omg, another oil thread.
3.6 short tick at cold start is nothing compared to the 5.7 “Hemi tick”.

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[MrZappo]

Surefire way to cure the minimal tick on startup is earplugs. Or ignore it.

As far as the oil argument. Use clean oil. Changed on time.

I bet you will never have a problem.

 

[Atticus]

It is the old 3.6 tick

And they have know about it a while

 

[stuckindeep]

What would your theory be on why 5w-30 should be used instead of 0w-20 to prevent the startup tick? Considering 0w-20 is the factory spec, could this cause issues if there were subsequent failures which should be covered by warranty?

You are on the right track; I went to school in the Military for Oil Analyss. Back in the early 90s dodge rams were having issues with engine failure and customers were finding metal flakes in their oil. the MFG for oil was 10w30. Well owners thought they knew best and were using 20w50 oil. Contrary to popular belief it is not. When dealers found out they were using the wrong oil they would not replace the engines. This gave Ram and Dodge a bad name and sales suffered. Owners are their worst enemy. The bearing tolerances were designed for 10w30 oil not 20w50 oil. On start-up the 20w50 oil could not get between the bearing surfaces and there was metal to metal contact. As modern engines have developed the bearing tolerances have gotten smaller hence the use of 0w20 oil. It is all about the viscosity design of the oil in relation to bearing tolerances (the state of being thick, sticky, and semifluid in consistency, due to internal friction). The moral is owners are just not as smart as they think they are. So thinner is better not thicker in modern engines.

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