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Well to be honest I had no idea it was bad. I went through a string of issues. Random misfires which seemed to clear up with new plugs and coil packs (although the ones that were in it were not very old) during a pre track inspection -- they happened for the first time at the dealer. Then I lost a ton of clutch fluid on track that day, which turned out to be a blown vent line on the transmission. Then the next track day I started leaking oil from the rear main and one cylinder head. I noticed it right away when I came into the pits and never tried to start it again. Pulled the engine and had them inspect the finger followers (early F0) which triggered a warranty replacement. We found the flywheel was a mess when the G6 was going in.
Last edited by thewestwon; 09-20-2024 at 06:37 PM.
Well to be honest I had no idea it was bad. I went through a string of issues. Random misfires which seemed to clear up with new plugs and coil packs (although the ones that were in it were not very old) during a pre track inspection -- they happened for the first time at the dealer. Then I lost a ton of clutch fluid on track that day, which turned out to be a blown vent line on the transmission. Then the next track day I started leaking oil from the rear main and one cylinder head. I noticed it right away when I came into the pits and never tried to start it again. Pulled the engine and had them inspect the finger followers (early F0) which triggered a warranty replacement. We found the flywheel was a mess when the G6 was going in.
I understand, you only changed to a new flywheel because it looked that bad (extensive play and the grease which comes out)! Porsche dont recomended the change to the new flywheel?
would you use my flywheel or change it to a new one?
Run a magnet on the shavings, and see if they stick. I would gues its the rods bearings, 13.00 compression is hard on any rod bearings, on any engine..
Well to be honest I had no idea it was bad. I went through a string of issues. Random misfires which seemed to clear up with new plugs and coil packs (although the ones that were in it were not very old) during a pre track inspection -- they happened for the first time at the dealer. Then I lost a ton of clutch fluid on track that day, which turned out to be a blown vent line on the transmission. Then the next track day I started leaking oil from the rear main and one cylinder head. I noticed it right away when I came into the pits and never tried to start it again. Pulled the engine and had them inspect the finger followers (early F0) which triggered a warranty replacement. We found the flywheel was a mess when the G6 was going in.
When my GT3 got a G6, Porsche had to replace the flywheel aswell. I noticed a strange noise during idle (clicking like ping pong *****/metal *****) before but nothing was found until they pulled the engine/gearbox.
Run a magnet on the shavings, and see if they stick. I would gues its the rods bearings, 13.00 compression is hard on any rod bearings, on any engine..
I used a magnet- some shavings are on it but not all metal looking parts are magnetisch!
see some pics from the Zylinders - one piston seem to have a crack?
Tomorrow i will open the both two oilfilters - perhaps shavings are visible? Could this be a crack? Crack ?
very odd. Was the car modified at all or completely stock (engine/exhaust/tune/etc)?
Judging by the crack and scoring it seems like maybe something was off with the air/fuel mixture of that cylinder. Possibly run too lean causing detonation, and higher temps that caused the piston to expand too much, reducing cylinder wall clearance and scoring it?
Or maybe the opposite, a leaky injector stuck open that washed out the oil in the cylinder wall (although that doesn't really explain the crack as much).
very odd. Was the car modified at all or completely stock (engine/exhaust/tune/etc)?
it had an other exhaust, but dont know if this differ? And the airfilter is an tuning Part from BMC.
If the done some other tuning I dont know!
But the power of the engine was very good, the acceleration was like a 991.1 RS (the drivers statet that the car had same power).
Judging by the crack and scoring it seems like maybe something was off with the air/fuel mixture of that cylinder. Possibly run too lean causing detonation, and higher temps that caused the piston to expand too much, reducing cylinder wall clearance and scoring it?
Or maybe the opposite, a leaky injector stuck open that washed out the oil in the cylinder wall (although that doesn't really explain the crack as much).
I noticed no noices from the engine - so I am a little bit confused.
I wait for some tools for removing the crankshafts. Then I take the cylindethead off.
I have a technical manual from Porsche from 2014. Do you know if the torques for mountig the crankshafts or more important the connecting rods have changed? The early cars had some problems with the connecting rods!
Can someone please send the actual torque values from the engine?
09-20-2024 | 05:10 PM
