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start up noise

duncan11
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duncan11 Member

duncan11

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When starting first thing my engine makes a growl noise, could this be a chain tensioner pumping up , and the noise is in fact the timming chains running over the tensioners.. it only lasts for a fraction of a second. The noise is not their if  I  re- start it within a few hours.  Have had new water pump in last 12 months. Any help thanks

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JFP in PA Member

JFP in PA

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1 hour ago, duncan11 said:

When starting first thing my engine makes a growl noise, could this be a chain tensioner pumping up , and the noise is in fact the timming chains running over the tensioners.. it only lasts for a fraction of a second. The noise is not their if  I  re- start it within a few hours.  Have had new water pump in last 12 months. Any help thanks

 

Welcome to RennTech :welcomeani:

The M96/97 engines are famous for start up noises, primarily caused by the hydraulic chain tensioners bleeding down while sitting (Porsche updated these a couple of times to try and help with this).  Eventually, they will need to be changed, but in the meanwhile switching to an oil with higher film strength can help reduce the issue.

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