I have a new 997 gen2 C2, purchased October 2009. The mileage is coming up to 1350 mls and overnight I have discovered what appears to be one of the hydrolic tappets ticking after the engine has reached normal operating temp. The noise is more noticeable at tick over and increases with engine speed. I called in at the OPC where the vehicle was purchased from and one of the technicians confirmed my fear. The vehicle was booked in and after 2 days I was told that the noise could not be heard. After a brief & irate conversation with the service manager he also confirmed after sitting in the car that the engine was indeed sounding a little sick. I am now waiting to see what Porsche are going to do with it. Does anyone else have any similar problem with the gen2 engine?
Noisey tappet left cylinder bank
- Thread starter gmeanie
- Start date
adrian996
New member
After just three months of ownership I would definitely just ask them to replace the car - rather than taking the engine out and faffing about! Trying to sell a 911 with a replacement engine is always going to be tricky!
It could have been that some swarf or similar debris from the engine manufacture got stuck in one of the oil supplies and blocked it off - thus starving the hydraulic tappet of oil...?
It could have been that some swarf or similar debris from the engine manufacture got stuck in one of the oil supplies and blocked it off - thus starving the hydraulic tappet of oil...?
Never had any issues with mine. Out of interest, at idle, how many "ticks" per second, roughly? If the engine is idling at, say, 1000 rpm then each cylinder fires 500 times (as it takes two crank rotations to complete the cycle) That then means each valve opens 500 times per minute or around 8 times per second. So, if my maths are right (which is dodgy in itself) 8 "ticks" per second is probably valve related? Actually when you think of it in those terms it's pretty scary what's going on inside the engine at 7000rpm!!
The DFI engines are also much more "ticky" because of the injection system, I believe. I'm sure someone will correct my maths if I've got that wrong!
The DFI engines are also much more "ticky" because of the injection system, I believe. I'm sure someone will correct my maths if I've got that wrong!
dereksharpuk
New member
Getting Porsche to replace the car is nigh on impossible. Under the Sale of Goods Act you will have to warn your Dealership (for that is who you had a contract with), that you will reject the car if they cannot fix the problem. Then you will have to give them a reasonable amount of time to fix it. If they do fix it, then you have no reason to request a replacement car.
Thank you for your replies, I will wait and see what Porsche propose to do. I have a sneaky suspicion that they will want to replace all of the left cylinder head bank valves and hydrolic tappets. This is my very first Porsche, and I have limited knowledge of the mechanics of the engine do they need to drop the engine out to replace valves etc?
Following the reply from tscaptain and the number of ticks it is making in a second, he is probably right because I am counting about 7 - 8 ticks per second. I am still awaiting Porsche regarding what they propose to do with the vehicle. With my limited knowledge of these engines I would have thought that the Porsche technician would have been able to identify what was causing this problem when they have the vehicle in for two days. I also understand that they may have sent off a sound file to Porsche to see what they think it maybe.
Hmm.. problem is that the 7-8 ticks per second does not apply exclusively to valves. In the same full cycle it applies to injection of fuel and number of sparks! I have read elsewhere that the little hole that supplies oil to inflate the valve lifters has been known to get blocked and this will produce a tick. It may not be that easy to trace, unfortunately. Good luck and keep us posted.
Andyg400
Member
The RS4 V8 I had was FSI, thus Direct Injection. I can't really say that it was much lounder than any other car ... thus I suspect your problem is one of the injectors, does it come from one side only ?.
I assume they mean fuel rail ... can't see that fixing it ...
Here is a vid that explains DI ..... little side note ... assume you know about the carbon build up on valves for DI engines ....
http://www.youtube.com/watch?v=PqZXyHp9cPk
Something you might consider ..
http://www.wynns.be/news.aspx?l=EN&isectionid=49&iarticleid=282
I assume they mean fuel rail ... can't see that fixing it ...
Here is a vid that explains DI ..... little side note ... assume you know about the carbon build up on valves for DI engines ....
http://www.youtube.com/watch?v=PqZXyHp9cPk
Something you might consider ..
http://www.wynns.be/news.aspx?l=EN&isectionid=49&iarticleid=282
Yes, one side only. I can hear it over my left shoulder. It got progressively louder and can only be heard after the engine has reached normal operating temp. Mileage on the car from new - 1644 mls.
I am coming to the conclusion that the OPC really don't have a clue, so I await the new fuel line fitting.
I am coming to the conclusion that the OPC really don't have a clue, so I await the new fuel line fitting.
Result!!! Collected the car today from OPC. Problem solved, they have fitted a new high pressure fuel pump and the noise has gone completely. If anyone else with a Gen 2 engine starts to suffer with the same problem then they are now aware of what the cause is. Good luck and thank you to all the forum members who took the trouble to reply with advice.
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