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Discussion summary
YOUR RESEARCHWhat's wrong with this engine? (video)
Leading reported evidence
Use on outriggers
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
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Read evidence and context
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Performed · outcome unconfirmed
The rythmic staccato reminds me of the sound made by small engines used on outriggers
Leading evidence: 'Use on outriggers' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check metal' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
If it stutters or shakes check the plugs and get it fixed before starting it again.
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Suggestion
I wouldn't recommend driving it until your able to figure it out.
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Suggestion
Start with the easy ones like loose spark plug, loose exhaust header and bolts, or if you are dangerous enough to run the engine again check to see if there is engine compression felt at the oil fill tube by holding your hand over the tube.
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Rennlist: 1 discussions
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I can't really tell from the video, since I have minimal sound. Is it throwing any codes ? I wouldn't recommend driving it until your able to figure it out.
Difficult to tell from the audio how much of that is exhaust and what part is mechanical; but it really seems to have the potential to be very serious - as in don't run the engine & have it towed in serious. GL & post further diagnosis.
The noise is about 8Hz @idle => coinciding with one of the cylinders. Hopefully it's just a loose spark plug. +1 on not driving it till it's been looked at.
Hope it's just a manifold gasket maybe? But I don't really think it is, its most likely terminal to be honest :-( piston slap due to bore wear? hope I'm wrong.
Yikes. That sounds like a rod or a piston since the sound gets louder as you accelerate. Doesnt sound like a bad valve. Could be an exhaust leak, I would start there. How is your oil pressure? If the pressure is low, that indicates a rod.
Take the oil filter out and check for metal. If there is metal in it, not good.
No CEL? No smoke? Vital fluids ok?
Do not start the engine again, just to be safe. Flat bed the car to a qualified shop and have an expert give a listen.
I am not a professional mechanic but the noise sounds like one horrific exhaust gas leak (but it could something else though equally as benign (though you do not want to let this go at all!).
My thinking is if the noise was really really something serious internally the engine would be showing more than just the noise about now.
Dang, pretty "ballsy" to drive the car with it sounding like that. Best of luck getting it sorted out.
P.S. The rythmic staccato reminds me of the sound made by small engines used on outriggers
That sounds like really bad rod knock; I certainly wouldn't drive the car. Shouldn't be lifters or valve train, the frequency is too slow.
How in the world would that be manifold gasket related?
Much like all the other posters. Stop driving that car. Does the sound become louder at the rear with the engine lid opened? Get it into a garage for a better diagnosis. It sounds awful and would scare me half to death if it was coming from my car. Best of luck.
Combustion leak... Probably a loose spark plug, or you blew a chunk out of a head.. PLEASE DO NOT START IT AGAIN!!!!!! It is very easy to drive these engines to death and a simple issue can become a huge one in just a few seconds.
No noise is a good noise, especially under load...
+1 Check the plugs first. Do not start the engine again. If it is a chunk of head, it is seconds from grenading the motor. Flatbed it to a reputable Porsche shop...
I've listened, and I've read the other posts. In my humble opinion, the answer to your question "What's wrong with this engine" is "your engine is f'd Up". Thank you. Thank you. The tequila has spoken.
The head has a cylinder liner pressed in known for slipping or the top edge breaking a chunk off.
The engone costs about the same to rebuild as it does for a new one which is pretty much the price of the car. Would be best to figure out the problem before giving a possible cracked rod or cylinder a chance to be more destructive. Start with the easy ones like loose spark plug, loose exhaust header and bolts, or if you are dangerous enough to run the engine again check to see if there is engine compression felt at the oil fill tube by holding your hand over the tube. Might be getting the blow off from a crack into the oil area instead of water or oil.
If its a stuck valve oh well. Since you were driving it did it seem like it lost any performance or is the engine shaking? If it stutters or shakes check the plugs and get it fixed before starting it again. That's because if its valve or rods you don't want to make the problem worse like driving the valve throught he piston or throwing the piston through the head with the rid sticking through the crank case. Looks ugly on a porsche
