Hi all

I went for a morning drive in the mountains for a few hours today and the car drove great! However, When I was on my way home I noticed a knocking/squealing sound from the engine so I pulled over to check. Couldnt see anything, no leaks or anything loose. Engine was still pulling as normal. I took this video: https://drive.google.com/file/d/1428...ew?usp=sharing

So I nursed it home just in case so that I could inspect it. The noise got worse. I got close to home and then engine cut out at the lights but I managed to get it started again. I captured another video when I got home and you can hear the knocking has gotten worse: https://drive.google.com/file/d/1Hue...ew?usp=sharing

When the engine cut out I did get a quick flash of the oil light on the dash. But it went out really quick when the engine fired up. The pressure was around 2 on the gauge. The car was idling fine an I cant see any smoke. I am letting it cool down and will start again to see how it is. I was thinking maybe the oil is low? But surely the oil pressure and the oil gauge in the digital dash would show this?

I could take it to a workshop to have it inspected but now I am worried I will make it worse driving it around
Car is a 2000 3.4 C2. Oil changed at the start of this year using 5W40. IMS was done about 15kmiles ago. Currently on 135k
Was hoping someone could share some info that could help me diagnose this, would be much appreciated.

 

A chunk of your serpentine belt is gone. Maybe it's a piece of the belt slapping against something? That's what I would check first anyway.

 

I thought this too and was hoping it was this. I just removed the airbox and checked the belt and that all seems fine. The knocking seems to be further inboard :S https://drive.google.com/file/d/1wEh...ew?usp=sharing

 

First thing to do is unscrew the oil filter and catch any dripping oil in a clean pan/bowl and inspect the oil and filter and canister for metal debris. If all good you breath a sigh of relief but my gut tells me you spun a rod bearing..

I suspect you may have been a little low on oil and with a 40 weight and aggressive driving in the mountains...the temperaturre rose up and oil thinned out and an abundance of oil went into the heads and left the Sump dangerously low on oil and in a sharp turn the engine starved for oil and spun the rod bearing..

There are lots of preventative measures to avoid this, use a 50 weight oil that can handle the temps and slows the flow down to the heads, install the UAOS Track so you can run extra oil, add a 2 qt deep sump or the UIDS that can handle any turn no matter how much G force...

Sorry that happened to you.....

 

I agree that it's something more serious than the belt. I was going by what I saw in one of your videos.

The circled area of your belt from this screencap does looks dodgy though. Maybe it's just the video quality.

 

ah man I hope it’s not bad. I’ve got it booked in at my local Porsche specialist tomorrow so fingers crossed it’s not bad but sounds like it might be

I only do these mountain drives once or twice a month tbh. Most of the time is just a regular commute to work. Would a 5w50 be okay for a normal commute and regular day to day driving?

Sorry to sound like a newbie but what is the UAOS track and what does it do? This is my first Porsche so learning as I go along

Thank you for your help

 

Oh I didn’t notice that, but yes I think it might be the video quality. Thanks for your help

 

Sorry for you, but imho from all the rod knocks I've heard unfortunately, yours sounds like the classic metalic bad rod knock. Only thing missing too completely confirm this, is to give it a little gas and listen if the knock exactly follows the rpm.... And check for metal in the filter/sump. But if this just happened might not be a lot.... in reality you don't have to do any more, its rod knock for sure.

Don't drive it anymore if you want any salvageable expensive engine parts....