Identify this noise in broken Boxster engine - with vid
Discussion
Hi everyone
I have got some videos of my engine and wondered if anyone could identify what the problem could be with it. The car has bypass pipes fitted so is a bit louder than standard and it also has not been started for 9 months.
Not the best quality video but you can hear a noise as the engine idles. It's strange because the car runs etc but just doesn't run right.
http://s266.photobucket.com/user/giltranator/media...
Here is the original story:
My Boxster practically died in December.
It was an extremely wet day and I drove from Bristol to Birmingham in my 2000 Boxster S with 70,000 miles to collect my friends new to him 2004 Boxster. On the way home I was on the M42 on a continuous throttle at 65mph and there was a massive shudder throughout the car. The check engine light started flashing and I immediately pulled over to the hard shoulder where, as the car was coming to a stop it died. I attempted to restart the car and it was very hesitant to catch and then it would start and sound really rough and then cut out again. The AA came out and plugged diagnostic equipment into the car which said there was an engine misfire on cylinders 1 and 3. The codes were cleared and I restarted the car. This time it caught first time but it sounded terrible. Really rough and lumpy and pretty much like a cement mixer. I turned the car back off and it was recovered to Porsche Bristol. They performed small checks on the car and they said they found small metal particles in the oil filter. This is as far as i let them take it as they wanted £2,000 to diagnose the fault and £9,000 for a second hand engine!!!!
I had the car recovered to my house so my dad could have a look at the car. It is worth mentioning that all of the coil packs were changed last year by Porsche.
So far the gearbox, clutch and flywheel has been removed from the car but there seems to be no damage to the IMS bearing. It is fully intact. The bearing moved when the flywheel was removed due to the tension on it but it is now back in the middle and has not slipped on any teeth or cogs etc.
I am not sure whether Porsche checked the filter properly as there was still a lot of oil within the car.
Seeing as the IMS bearing appears to be fine, I am wondering what else could have caused this? I have heard a bit about the camshaft solenoids or perhaps it could be a failed conrod. I think our next job will be to rotate the engine by hand and see if there are any unwanted noises from inside the engine but I am wondering if anyone has any other advice of what it could possibly be??
I have got some videos of my engine and wondered if anyone could identify what the problem could be with it. The car has bypass pipes fitted so is a bit louder than standard and it also has not been started for 9 months.
Not the best quality video but you can hear a noise as the engine idles. It's strange because the car runs etc but just doesn't run right.
http://s266.photobucket.com/user/giltranator/media...
Here is the original story:
My Boxster practically died in December.
It was an extremely wet day and I drove from Bristol to Birmingham in my 2000 Boxster S with 70,000 miles to collect my friends new to him 2004 Boxster. On the way home I was on the M42 on a continuous throttle at 65mph and there was a massive shudder throughout the car. The check engine light started flashing and I immediately pulled over to the hard shoulder where, as the car was coming to a stop it died. I attempted to restart the car and it was very hesitant to catch and then it would start and sound really rough and then cut out again. The AA came out and plugged diagnostic equipment into the car which said there was an engine misfire on cylinders 1 and 3. The codes were cleared and I restarted the car. This time it caught first time but it sounded terrible. Really rough and lumpy and pretty much like a cement mixer. I turned the car back off and it was recovered to Porsche Bristol. They performed small checks on the car and they said they found small metal particles in the oil filter. This is as far as i let them take it as they wanted £2,000 to diagnose the fault and £9,000 for a second hand engine!!!!
I had the car recovered to my house so my dad could have a look at the car. It is worth mentioning that all of the coil packs were changed last year by Porsche.
So far the gearbox, clutch and flywheel has been removed from the car but there seems to be no damage to the IMS bearing. It is fully intact. The bearing moved when the flywheel was removed due to the tension on it but it is now back in the middle and has not slipped on any teeth or cogs etc.
I am not sure whether Porsche checked the filter properly as there was still a lot of oil within the car.
Seeing as the IMS bearing appears to be fine, I am wondering what else could have caused this? I have heard a bit about the camshaft solenoids or perhaps it could be a failed conrod. I think our next job will be to rotate the engine by hand and see if there are any unwanted noises from inside the engine but I am wondering if anyone has any other advice of what it could possibly be??
Edited by giltranator on Friday 6th September 13:35
Sounds like IMS bearing. I've heard a few -- not many thank goodness and not from my Boxster (double thank goodness!) -- and that's what it sounds like.
The IMS bearing is missing it seal. That's not good. Has someone removed this or perhaps fitted an aftermarket IMS bearing upgrade? Doesn't look like and aftermarket bearing though.
Check that oil from the IMS bearing with a magnet. If you get ferrous metal dust/bits with sparkle that's the early stages of full out bearing failure.
I would *not* run the engine any more.
You can pull the camshaft cover off of cylinder bank 1 and check valve springs and the VarioCam actuator guides for deterioration.
What's the filter housing oil look like? Dump this out into a *clean* drain pan and look at the filter element too. Check for ferrous metal. If hard dark brown plastic bits that's a cam chain guide cover possible coming apart. This can be due to a failing tensioner. This can make the chain run really noisy. If you continue to run the engine soon it will jump time and valves and pistons can make contact and then the engine is really shot.
The IMS bearing is missing it seal. That's not good. Has someone removed this or perhaps fitted an aftermarket IMS bearing upgrade? Doesn't look like and aftermarket bearing though.
Check that oil from the IMS bearing with a magnet. If you get ferrous metal dust/bits with sparkle that's the early stages of full out bearing failure.
I would *not* run the engine any more.
You can pull the camshaft cover off of cylinder bank 1 and check valve springs and the VarioCam actuator guides for deterioration.
What's the filter housing oil look like? Dump this out into a *clean* drain pan and look at the filter element too. Check for ferrous metal. If hard dark brown plastic bits that's a cam chain guide cover possible coming apart. This can be due to a failing tensioner. This can make the chain run really noisy. If you continue to run the engine soon it will jump time and valves and pistons can make contact and then the engine is really shot.
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