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Post by ledders on Jun 8, 2021 12:45:20 GMT
Upon recently replacing the tyres on my P5B the tyre fitter reported that the bore of a few of the holes had worn. As a result there was a danger of the wheel nuts “pulling through” when fully tightened.
Do any Members have experience of the issue and possible fixes?
Many Thanks
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Post by Jens Munk on Jun 8, 2021 13:37:56 GMT
Conical washers exists for this purpose. I bought some for an old Ford Flathead V8 I used to own:
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Post by ledders on Jun 8, 2021 14:04:19 GMT
Thanks Jens.
My 32 years of working for the UK region of Faerch, Holstebro has taught me you can always rely on the Danes 👍
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Post by Phil Nottingham on Jun 8, 2021 14:57:15 GMT
Are they really safe to use though on wheels?
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Post by ledders on Jun 8, 2021 15:09:57 GMT
I am a bit limited on options other than new (unoriginal) wheels - not keen
Could larger wheel nuts be an option?
Flat/spring washers?
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Post by Phil Nottingham on Jun 8, 2021 16:34:48 GMT
Not happy with larger nuts which could still bottom and thus work loose and certainly not spring washers ever.
Worn conical seats are the result of loose wheel nuts and happen with any wheel. I have had several wear on P4s P5s & P5Bs and replaced the wheel
I lost a rear wheel on a our P5 Coupe many years ago because the nuts had not been fully tightened and the holes became overtightened. I was not going fast and the rim of the brake drum still bears the flat it gained being dragged along the tarmac
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Post by ledders on Jun 8, 2021 16:59:42 GMT
Thanks Phil
I have been searching for replacement wheels and they’re only available on an exchange basis with the exchange being “fit for restoration”
Looking like new wheels unless there I can find another solution
shame as the Rostyle are a classic
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Post by Jens Munk on Jun 8, 2021 17:30:34 GMT
I guess it depends on how worn the holes are. I never had any problems with them on the Ford. Are they really safe to use though on wheels?
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Post by Phil Nottingham on Jun 8, 2021 21:31:14 GMT
Thanks Phil I have been searching for replacement wheels and they’re only available on an exchange basis with the exchange being “fit for restoration” Looking like new wheels unless there I can find another solution shame as the Rostyle are a classic Reasonable Rostyles turn up on eBay and FB quite often. New ones are NLA
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Post by enigmas on Jun 8, 2021 22:44:37 GMT
Upon recently replacing the tyres on my P5B the tyre fitter reported that the bore of a few of the holes had worn. As a result there was a danger of the wheel nuts “pulling through” when fully tightened. Do any Members have experience of the issue and possible fixes? Many Thanks How can the wheel stud holes wear thin!? I'm answering my own query here but the only way I could possibly think this could occur is if they were never torqued to the correct tension, ie., were always under tensioned allowed allowing movement and friction to erode the seating faces against the conical nut face. This scenario would have had to have continued for years. I'd be checking the seating surfaces up close and personal (against a 'good' wheel) to verify the tyre fitters assessment. Not trying to demean the tyre fitter but he's not an engineer. Ledders, I'd hazard a guess that mechanical assessment is not a strong forte of yours (ie., spring washers under wheel nuts. Now that would erode the seating surfaces of the wheel seats.) In your sitation I'd look for a mechanically adept individual who has a neutral interest in your car to assess the wheels. Not someone that may want to sell you a set of wheels? There are 5 stud holes on each wheel, I doubt that they're all stuffed! Conical Wheel Nuts. The conical fastening wheel nuts when tightened should never touch up against the wheel hub. They should tighten up against the tapered seat of the wheel hole. If the nut end contacts the flat surface of the wheel hub then it's not tensioning the wheel hub face against the hub...it has effectively bottomed out. So the nut can be tight but the wheel loose. If the nut bottoms out the taper on the nut is too steep and is passing through the hole, ie., it's not seating on the wheel seat taper. Check each wheel nut in each wheel seat to see if the taper protrudes through the hole. It shouldn't. If so face the nut on a bench grinder/lathe to remove some material from the end of the tapered face. If this isn't viable have a competent machinist turn up some nuts from a bar of hex steel with a slightly wider taper so that it covers the broad area of the tapered wheel seats. Eg. If the taper angle was 40° make it 43°. This changes the seating surface slightly and places the load on to a different point of the wheel seat taper.
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Post by ledders on Jun 9, 2021 8:22:40 GMT
Hi Enigmas
Thanks for the feedback
I am no engineer that’s for certain, I have been in sales all my life. I have always wanted a P5b and now I have one I just want to look after it to the best of my ability which amounts to being a mechanics “mate” and covering all costs! I know my limitations 😳
However I do fully understand your assessment and am grateful for your input. The tyre fitter is a family friend but as you say no engineer and confirmed one affected hole on each of the front wheels. As for a neutral mechanically minded individual my brother in law has been a mechanic for 40 years and is already enjoying working my P5b not least as it’s a car that he does not plug a laptop into,
I’ll pass on your feedback to him
All the best and thanks again
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