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Knocking/ticking from engine

GranburyChuck
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GranburyChuck Member

GranburyChuck

Posted
Posted

Hey all, got a 2000 996 C2 Tip with 98k miles on it. Runs very well no issues. Recently I have started to notice a ticking sound on start up. I think it stays there although somewhat lower sound after warming up. I assume this to be a lifter not pumping up correctly. That doesn't concern me terribly. What does is the occasional romp I have at higher RPMs I get a very pronounced harmonic vibration when I stay at certain RPM levels. Mostly goes away when accelerating\decelerating but comes back when RPMs are fairly constant at >2500. Normally, my drive is in full auto on the way home so the car rarely gets up to 3000. I know it is not a good idea to not "wring it out" every now and then. But when I run the RPMs way up this vibration really booms in the cabin. My assumption is that something is not right with a bearing. Anyone know a way to check this out?

PS, no oil loss whatsoever. What I put in, stays in for full 15k miles until next oil change.

Thanks

KevinMac Member

KevinMac

Posted
Posted (edited)
Hey all, got a 2000 996 C2 Tip with 98k miles on it. Runs very well no issues. Recently I have started to notice a ticking sound on start up. I think it stays there although somewhat lower sound after warming up. I assume this to be a lifter not pumping up correctly. That doesn't concern me terribly. What does is the occasional romp I have at higher RPMs I get a very pronounced harmonic vibration when I stay at certain RPM levels. Mostly goes away when accelerating\decelerating but comes back when RPMs are fairly constant at >2500. Normally, my drive is in full auto on the way home so the car rarely gets up to 3000. I know it is not a good idea to not "wring it out" every now and then. But when I run the RPMs way up this vibration really booms in the cabin. My assumption is that something is not right with a bearing. Anyone know a way to check this out?

PS, no oil loss whatsoever. What I put in, stays in for full 15k miles until next oil change.

Thanks

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Edited by KevinMac

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