991GT3 - weird bit of noise after the engine swap
Discussion
Has anyone, by any chance, experienced a strange type of "clutter/klack/rattle" (not sure how to define) noise coming from the RH rear side of the car (engine bay, suspension?) after the engine exchange?
Firstly, it becomes very clearly audible (almost as if isolated from the rest of the car) only after everything gets to working temperatures (10-15 minutes of driving). Secondly, it can be heard only as and when there is a fairly pronounced ripple on the road and the read end of the car 'jumps" a little bit that moment. The noise is very articulate and "decisive" as if something was a bit loose somewhere in the back. No functional or mechanical consequence or malfunctioning of anything present, simply a damn nuisance. All quiet under other conditions, even manholes or usual road imperfections do not have an effect.
As soon as the car has cooled down even a little (20-30 minutes), it goes away and comes back in the described manner. Evidently, something happens after thermal expansion - combination of metal/plastic rattling subjectively to my ears.
Apart from the rear PU and the backbone/tailpipe end of the exhaust, very little else has been removed from the car for the engine swap, even the cats came new bolted on to the new engine. Yes, the gearbox had to be taken off, but that is a solid connection to the engine. The only other thing disturbed were the driveshafts and a few points of rear suspension (if I am not wrong). So, not much else to be loose or to flap around.
Oh, almost forgot - this was most certainly not to be heard before the engine replacement.
Tks in advance.
Firstly, it becomes very clearly audible (almost as if isolated from the rest of the car) only after everything gets to working temperatures (10-15 minutes of driving). Secondly, it can be heard only as and when there is a fairly pronounced ripple on the road and the read end of the car 'jumps" a little bit that moment. The noise is very articulate and "decisive" as if something was a bit loose somewhere in the back. No functional or mechanical consequence or malfunctioning of anything present, simply a damn nuisance. All quiet under other conditions, even manholes or usual road imperfections do not have an effect.
As soon as the car has cooled down even a little (20-30 minutes), it goes away and comes back in the described manner. Evidently, something happens after thermal expansion - combination of metal/plastic rattling subjectively to my ears.
Apart from the rear PU and the backbone/tailpipe end of the exhaust, very little else has been removed from the car for the engine swap, even the cats came new bolted on to the new engine. Yes, the gearbox had to be taken off, but that is a solid connection to the engine. The only other thing disturbed were the driveshafts and a few points of rear suspension (if I am not wrong). So, not much else to be loose or to flap around.
Oh, almost forgot - this was most certainly not to be heard before the engine replacement.
Tks in advance.
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