Re: Knocking Noise from under the Clutch
I am it seems a fool (and there are others who have helped me down this road who shall remain nameless) but last night the knocking came back and easing home gently the n/s front wheel detached itself from the car. The rest of what happened is for another time but after repeated inspection of engine mounts, driveshafts, wishbones/joints et al, tightening wheel bolts (it's true I did, honest) over the last 3 months it appears that the entire problem was a result of something far simpler and which it is worth declaring.
Two mechanics have so far suggested that the incident derives from a previously under-tightened wheel bolt (and I thought these were hub rather than lug-centric) slowly and erratically (intermittent/absent knocking in a variety of environments/speeds) enablng the alloy to be worn on the inside so that it eventually was "knocking" on the hub in certain driving/drivetrain/power/direction configurations and that last night some critical point was reached, one bolt failed and the others sheared or vibrated out in short order - from no knocking under load at 50 to very loud knocking and disappearing wheel in 300m or so.
Others may of course have different opinions........some of them reflecting on continued use of a car with an intermiittent knocking from around the drivetrain - less than 10 miles a day on average at suburban commuting speeds, endless investigation, evaporation of noise for long periods........I don't think I have been irresponsible per se but there are lessons to be learnt.
So, navel gazing over, this is a note to the wary from the wiser - always check the wheel bolts after you or anyone else takes the wheels off and replaces them - consider the "obvious" as well as the more obscure when diagnosing!
One reason for this post is that while this time no one hurt (and there appears to be no need to replace drive shafts either which was to be my next precautionary step, due Tuesday, meaning that ironically, apart from a replacement wheel (£60 from AlfaAid) and Helicoiling the hub and thanks to my insurance NCD I am better off than I was going to be (if that makes sense)), it could have been far far far more serious for me, passengers and other road users.
So, shaken certainly and more alert to the things to check.....
And I won't be in need of any potential lectures thank you