8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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Discussion summary
YOUR RESEARCHTapping Noise - video
Leading reported evidence
Replace whilst the mileage is 80k the engine
Performed · outcome unconfirmed
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0
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0
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1
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Performed · outcome unconfirmed · Original poster
Whilst the mileage is 80k the engine was replaced at 30k.
Leading evidence: 'Replace whilst the mileage is 80k the engine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace whilst the mileage is 80k the engine' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion · Original poster
The weirdest thing is that sometimes - when i thottle off (and the windows down) i can hear it out of tune with the rest of the engine - almost as though there's something running on it's own momentum.
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Suggestion · Original poster
The weirdest thing is that sometimes - when i thottle off (and the windows down) i can hear it out of tune with the rest of the engine - almost as though there's something running on it's own momentum.
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8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Outcome without a verified action link
I've changed plugs etc and had a new manifold in the last fews days - made no difference.
Hi guys, i've developed a tapping noise over the past 18 months. It used to only be for a few seconds at start up but now is getting more regular and louder! My car is a 98 C2 3.4 with 80k on it. I've changed plugs etc and had a new manifold in the last fews days - made no difference. It does quieten down at times and then come back. The weirdest thing is that sometimes - when i thottle off (and the windows down) i can hear it out of tune with the rest of the engine - almost as though there's something running on it's own momentum.
https://www.youtube.com/watch?v=Nywk3sLSe84
Any ideas?
ps it's coming from the drivers side bank
QM
Hi Coullstar, no discernable difference in plugs. Oil filter looked ok. Oil consumption is minimal. Whilst the mileage is 80k the engine was replaced at 30k.
QM
Mine has a noisy tappet as well albeit quieter than yours, yours does seem quite loud. I asked about this and it appears its fairly common.
What oil spec are you using?
Hi Coullstar, it is loud and is getting on my nerves! I'm putting Mobil 1 0/40 in it as it was on offer at Costcos's and the previous owner used it I was thinking of giving it a flush with something like 'seafoam' and then try a thicker oil. Are you aware any oils/ grades that might suit this type of issue?
QM
Sounds very much like a tappet to me ..
Lets face it .. you have had the noise for 18 monthes and its slowly gotten worse .. if it was something terminal it would have died long ago so we can pretty much rule out tensioners , chains .. big end etc due to the time its been there .
In the early stages you notice a difference in noise when its cold to when its hot .. i expect yours just makes the noise all the time now.
Downside .. you need the cams removed on that bank to get at them ... can be done in situe from memory but at a total guess im thinking £500 ish notes to replace one broken tappet ... lot more if the engine has to be dropped or its all of them on that bank ..
