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Old 06-27-2010, 10:16 AM
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HoustonHemi HoustonHemi is offline
Dodge Ram Forum Senior Member
Join Date: Jan 2010
Age: 50
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Gender: Female
Vehicle: 1492 Santa Maria
Color: Hot pink
Engine: 1981-1987 225ci (3.7L) Slant-6 95hp
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Originally Posted by 2010BHDodge View Post
I've seen two other 09 hemis do this. A dealer told me it was "piston slap" on startup but that doesn't sound right. I would suspect more to do with lubrication - either the light oil or if there is the check valve problem as mentioned in earlier posts.
I had what I thought was piston slap on a Silverado once... BUT, I was able to fix it,,,

Long story short, a knock sensor (and the wiring to the sensor) under the intake manifold was going out, and it pulled the timing out of kelter,,,

The knock would go away a few seconds after start up.

It knocked (occaisionaly) for months,,, Finally, the sensor 'died' and activated the MIL.

Read code, replaced sensor, knock gone.
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