I have a 2003 pontiac vibe, and I maintain it very well. however lately when I first start it up, more so when it is cold out side, it has a rapping sound coming from the front of the engin. as the engin gets warm it quits. I check underneath the engin and it is not a rod knocking. I am pretty good a fixing stuff but I doint like ripping in to somthing without knowing what causing the problem. I think it might be the timing chain tensinor.
noise in engine on 2003 Pontiac Vibe
by bigdodge in Indian Trail, NC on February 12, 2011
ANSWER by Tyreguy on February 12, 2011
More than likely, you are experiencing (and hearing) a 'dry start' due to the cold temperatures. Its simply a lack of oil getting to the valve train due to the oil being 'thicker' due to extreme cold temps. Its a very common issue.
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