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I am rebuilding an M96 engine now so have a little perspective to offer you.
I suggest you need a better mechanic and a sense of urgency if you are interested in preventing a total engine failure.
To give you some perspective a replacement engine is $8-20K +. Fixing the chain tensioners before the engine self destructs will save $thousands.
There was some wise advice given above to have your new,improved mechanic drop the sump to inspect for debris. Look carefully at the colors. Send us some photos. The chain ramps are usually black, the variocam pads are brown.
If you have the stock filter, that debris is already distributing itself throughout the oilways and may block them= kaboom!
Fixing it involves a total engine teardown -if you plan on keeping the car.
A Boxster roller is only worth $3-4k depending on year/miles/engine/condition. And yours may become a roller quite soon!:ah:
Good Luck!
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