Bore-Scoring??
#16
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Cant see the true effects of bore scoring without looking at the bottom of the stroke, which unless someone has found a procedure for getting a camera in that area, is not possible without engine removal.
Also, I've looked at buying so many of these I cant count, before I finally found 2 in this first gen that made sense. I will tell you that every one of them, when you hear it recorded from a camera phone, all sound like the rod is coming through the side of the block. Camera phones are not a reliable way of determining bore scoring. just my .02 cents.
Also, I've looked at buying so many of these I cant count, before I finally found 2 in this first gen that made sense. I will tell you that every one of them, when you hear it recorded from a camera phone, all sound like the rod is coming through the side of the block. Camera phones are not a reliable way of determining bore scoring. just my .02 cents.
The following 2 users liked this post by tsill13:
lkraav (04-25-2023),
PumbaaSA77 (04-25-2023)
#17
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This is about the clearest case of piston slap due to bore scoring that I've seen on this forum in a long time. Any money spent on oil changes, borescoping, diagnostics, etc. is a complete waste. It needs a new/replacement engine.
Last edited by brett968; 04-24-2023 at 10:32 PM.
#21
5th Gear
Thread Starter
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CONCLUSION
So I serviced the car yesterday. Oil and filter change. Used good quality synthetic oil and an additive. Also changed the plugs (on the remote hope that old/bad plugs could have been part of the problem). There is zero improvement and the slap is now more of 'cluk cluk' than a 'tic tic'. In addition there was oil in plugs 1, 2 and 5 so signs that both gaskets have gone too![Mad](https://rennlist.com/forums/images/smilies/mad.gif)
I have now satisfied myself that I have bought a real lemon and not going to spend any further cash on it
. Will try sell to recoup whatever cash I can and now on the hunt for a later model with hard evidence of being properly maintained.
(Frustrating thing is that she still pulls like hell and I'm really loving driving her. I just cant live with the horrible noise!)
Thanks for all the thoughts, suggestions and advice.
So I serviced the car yesterday. Oil and filter change. Used good quality synthetic oil and an additive. Also changed the plugs (on the remote hope that old/bad plugs could have been part of the problem). There is zero improvement and the slap is now more of 'cluk cluk' than a 'tic tic'. In addition there was oil in plugs 1, 2 and 5 so signs that both gaskets have gone too
![Mad](https://rennlist.com/forums/images/smilies/mad.gif)
I have now satisfied myself that I have bought a real lemon and not going to spend any further cash on it
![surrender](https://rennlist.com/forums/graemlins/surrender.gif)
(Frustrating thing is that she still pulls like hell and I'm really loving driving her. I just cant live with the horrible noise!)
Thanks for all the thoughts, suggestions and advice.
#22
Pro
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Yup, that's the best decision. Sorry this one didn't work out but I'm glad to hear that you're going to find a better sorted one as they really are great vehicles. If you're going to look for a 957, get an '09-'10. If a 955, look for an '06. That being said, climate plays a huge part in the overall health of these engines alongside maintenance. I'd steer clear on the '07 and '08 957s as they tend to have a higher reported instance of bore scoring in the 4.8 DI V8 (yes, I'm including '07s intentionally since OP is from the UK where there was an MY07 Cayenne).
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PumbaaSA77 (04-26-2023)
#23
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The gaskets are inexpensive and not all that bad to change, you can do it in a day with never having done it before.
is it bore scoring, chances are yes, but not 100%, I'd say its more like 60/40, no way of knowing until you properly diagnose it. I do understand not wanting to go further.
is it bore scoring, chances are yes, but not 100%, I'd say its more like 60/40, no way of knowing until you properly diagnose it. I do understand not wanting to go further.
The following users liked this post:
oldskewel (04-26-2023)