Um, a small observation? I've kinda lost track, but if we're speaking of the bushes at the inboard end of the lower suspension arms (and others of a similar type) then their intended method of operation does not involve rotation of the inner metal parts. The idea is that the central tube is fixed in position by pressure from the side of the u- tube, and the outer tube *flexes* on the rubber parts. This is why the suspension bolts should be tightened with the weight on the vehicle's wheels.
If the inner steel tube rotates on the bolt going through it, then it will wear appallingly, and it will not maintain a proper location of the wheel. They're *bushes*, not bearings. Which is pretty much what Jin wrote. Neil On 15 Sep, 20:55, jin <[email protected]> wrote: > hi Jim > I have used silicone after contacting the manufacturers regarding > this, more from a rust prevention point of view on the front tie rod > bushes as I didn't want my newly shot blasted and painted parts to go > rusty, > I agree with the notion that the bush would be better rotating around > the pivot than within the arm because it is, like you say roughly > finished, I think if I do what we have said with degreasing and re > greasing certain parts it should be the best outcome, > in fact ive just wiped the grease off and slapped it on where I want > it and done a mock up compressing the assembly in the vice and it > seems to work as intended. > > on the subject of bushes I think the polys are a bit of a compromise > in terms of which bit should rotate anyway > if you think about it the O.E spec bushes with the bonded-in inner > portion will be doing the pivoting by flexing the bush itself hence > why its always stated to torque the pivot bolt when the car is on the > ground to avoid over twisting the bush when lowering the car off the > jack, this is not the issue with the poly bushes as in the vice I can > rotate it 360 without issue since the parts are separate to one > another, probably for fitting proposes as I imagine they would prove > rather tricky to fit otherwise due to being so hard, > as it stands with the input from yourself and my trial and error I > have an idea now what im going to do and will watch it closely for any > issues > > thanks a lot for the help mate > > On 15 Sep, 08:39, Jim Hearne <[email protected]> wrote: > > > I must admit i've never been 100% sure which bit is intended to rotate > > on the silicone bushes, i've had several makes and they never say in the > > instructions. > > But often the bush is fitted into a roughly finished pressed steel hole, > > the rear trailing arms on the 2+2 for example, and i'm sure the bush > > rotating in that is a very bad idea. > > I did as you say, degreased the parts i didn't want to move and put > > silicone grease (you do know you can't put ordinary grease on the > > silicone don't you) on the centre pin and managed to get the parts i > > wanted to rotate to do it. > > If thats still the case 8 years later i've no idea but theres no obvious > > wear. > > Watch out if you degrease the silicone bushes, mine came with a note > > warning not to use solvents on them. > > > Jim > > > On 15/09/2010 06:44, jin wrote: > > > > good point Jim, and I had considered this happening as a possibility, > > > however I had reasoned with myself that the original bushes I took out > > > had the inner steel pivot vulcanised to the bush itself so any > > > considerable movement would translate to the outer portion of the bush > > > rotating within the arm, > > > further to this the bushes im fitting are only a light press fit into > > > the arm but a very tight fit onto the inner pivot, even prior to > > > turning the inner pivot down (which I did yesterday prior to reading > > > your post, oops) it still spun the bush within the arm as opposed to > > > spinning the bushes on the pivot, mind you this is with the whole > > > assembly greased up, maybe if I degrease the inner surface of the arm > > > and outer surface of the bush but keeping the inner pivot and outer > > > portion of the bush greased I may be able to induce enough friction to > > > rotate the bush on the inner pivot, ill build it up later and see for > > > sure. > > > > cheers for your input mate, much appreciated > > > > On 14 Sep, 09:04, Jim Hearne<[email protected]> wrote: > > >> I wouldn't take material off the centre bush. > > >> It's almost certainly designed that length to make sure the bushes > > >> aren't pinched so that the bushes move with the arm and rotate on the > > >> centre bush. > > >> If you shorten the pin almost certainly the bushes will stay still and > > >> rotate in the hole in the arm, the arm is steel and will rust once the > > >> bush wears the paint off, this will then wear the bush. > > >> The centre pin is stainless. > > > >> If you need to increase the space for the bushes slightly you can thread > > >> a length of M10 studding through the bracket in the chassis, through a > > >> thick washer, 2 nuts, another thick washer and the other hole in the > > >> chassis. > > >> Then wind the nuts away from each other spreading the bracket on the > > >> chassis slightly. > > >> You will need to go over what you need as it will spring back a fair bit. > > > >> Jim > > > >> On 13/09/2010 20:02, jin wrote: > > > >>> great minds think alike, ive a 2mm gap but ive only got 1.5mm thick > > >>> repair washers and ive got stainless too, they are the same O.D as the > > >>> bush sides but total 3mm overall.... > > >>> however further investigating shows the inner bush pivot to be about > > >>> 0.7mm wider than the bushes themselves (these are poly bushes which > > >>> come apart) so if I turn off 1mm from the overall length of the bush > > >>> pivot I can use 2 stainless washers either side which will give a > > >>> little nip to the bush to keep it firm. > > >>> ill try it out and report back later > > >>> cheers guys > > >>> On 13 Sep, 10:23, Jim Hearne<[email protected]> wrote: > > >>>> I agree, if there is that gap then you should fit some spacing > > >>>> washers, i'd use stainless steel or they will rust and wear the bushes. > > >>>> Maybe Quantum changed the part or maybe it's just production > > >>>> tolerances. > > >>>> Mine have always been a tight but possible fit. > > >>>> Jim > > >>>> On 12/09/2010 22:39, jin wrote: > > >>>>> just checked > > >>>>> the inner pivot bush is 51.2mm > > >>>>> and the inner dimension of the lower arm pickup is 53.1mm > > >>>>> so i need 2x 1mm thick spacers to go either side,..... > > >>>>> On 12 Sep, 20:17, jin<[email protected]> wrote: > > >>>>>> hmm, to pinch ot not to pinch? > > >>>>>> there is definate pinching going on here on mine, luckely ive only > > >>>>>> fitted one side, > > >>>>>> ill measure up the upper portion of the box and measure up the length > > >>>>>> of the inner track bush which should give me a distance, if its > > >>>>>> greater than 2mm ill shim it either side > > >>>>>> cheers for the input > > >>>>>> ill keep you posted > > >>>>>> On 11 Sep, 22:10, Jim Hearne<[email protected]> wrote: > > >>>>>>> I've built or rebuilt 3 2+2's and none have washers there or > > >>>>>>> noticably > > >>>>>>> pinched. > > >>>>>>> They have always been a very good fit on the bushes for me. > > >>>>>>> Jim > > >>>>>>> On 11/09/2010 21:55, hansdefauwes wrote: > > >>>>>>>> I remember putting a washer in. > > >>>>>>>> either a washer or pich it - so I chose for a washer. > > >>>>>>>> Hans > > >>>>>>>> ----- Original Message ----- From: "Jim Hearne"<[email protected]> > > >>>>>>>> To:<[email protected]> > > >>>>>>>> Sent: Saturday, September 11, 2010 10:47 PM > > >>>>>>>> Subject: Re: [Quantum Owners] inner track arm bush spacer? > > >>>>>>>> No, there aren't any spacers or washers in there normally. > > >>>>>>>> Jim > > >>>>>>>> On 10/09/2010 18:23, jin wrote: > > >>>>>>>>> hi all > > >>>>>>>>> the 2+2 is coming along nicely with only a few small jobs left > > >>>>>>>>> before > > >>>>>>>>> I turn the key, > > >>>>>>>>> today was suspension bolting on day, > > >>>>>>>>> I remember when I stripped the car I noticed that the box section > > >>>>>>>>> where the inner pivot bushes for the lower arm seemed a little > > >>>>>>>>> "pinched" inwards, almost as if the bush was too short or the box > > >>>>>>>>> section was too wide between side to side. > > >>>>>>>>> today ive fitted up the new arm with new poly bushes and it was a > > >>>>>>>>> sung > > >>>>>>>>> fit within the box section implying that this bush is the same > > >>>>>>>>> size as > > >>>>>>>>> the old one but the box section still looks pinched in slightly. > > >>>>>>>>> should there be a spacer between both or one side of the bush?, it > > >>>>>>>>> looks like a 3mm shim would do it but I don't want to do > > >>>>>>>>> something I > > >>>>>>>>> shouldn't. > > >>>>>>>>> has anyone else had such issue or noticed this? > > >>>>>>>>> cheers all.- Hide quoted text - > > >>>>>>> - Show quoted text -- Hide quoted text - > > >>>>>> - Show quoted text -- Hide quoted text - > > >>>> - Show quoted text -- Hide quoted text - > > >> - Show quoted text -- Hide quoted text - > > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s).
