Mysterious tapping disappears abruptly
07-15-2018, 03:38 PM
#1
4th Gear
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Mysterious tapping disappears abruptly
My wife’s 2003 Boxster 2.7 developed a loud ticking noise a week ago, dropped it at an opc who diagnosed scored bores in bank 1 and said it needed new engine casings. I didn’t believe them. Trailered it home to try an oil change and decided to take a short video to document the noise. Revved the engine twice and it went clunk an the noise stopped
any ideas? See attached video
any ideas? See attached video
07-16-2018, 11:54 AM
#3
Racer
That is strange. When the tapping stopped it almost sounded like something engaging that was not properly engaged like the clutch on the A/C pulley. Just a WAG.
07-17-2018, 07:46 AM
#4
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Just going now to take it out for a drive and then change the oil. Will look for anything in the oil
07-17-2018, 12:34 PM
#5
Rennlist Member
Keep us up to date. That video is wild. I have heard that type of ticking before and never heard it magically disappear! Did the shop borescope the engine to determine the failing cylinders?
07-17-2018, 04:33 PM
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Below is the photo they showed me as their evidence of scoring, they said this was typical of all 3 bores in bank 1, they circled the scoring for my benefit!!!.
I was not convinced, particularly as it burns zero oil and does not smoke. What do you all think !?
07-19-2018, 11:19 AM
#7
Race Director
Time to find a new shop.
Listened to the clip. That was indeed strange. I could agree with paulofto's WAG that something not completely engaged becoming completely engaged.
Another WAG: Check for something caught in behind the crankshaft pulley.
Unless the engine is shredding itself internally you won't see anything in the oil. You can send an oil sample out for analysis. If the oil has low miles it might not have accumulated scary amounts of PPM of aluminum, ferrous metals, or copper, etc. But you can still get a report and maybe spot something.
Listened to the clip. That was indeed strange. I could agree with paulofto's WAG that something not completely engaged becoming completely engaged.
Another WAG: Check for something caught in behind the crankshaft pulley.
Unless the engine is shredding itself internally you won't see anything in the oil. You can send an oil sample out for analysis. If the oil has low miles it might not have accumulated scary amounts of PPM of aluminum, ferrous metals, or copper, etc. But you can still get a report and maybe spot something.