Thanks for your very kind offer Barry. I have a couple of sets of 18"s that I can try, so that shouldn't be a problem. I also have brand new Tune Agent Tension Rods fitted(after the Cusco ones broke) and as the shudder was there before they were fitted, I think they can be ruled out as being involved. I will certainly consider your offer if all else fails to produce any results(prior to burning this millstone to the ground, and dancing on the ashes).:zlove:
Come on, Chili, you've got a long way to go before your 'millstone' catches up with my delinquent beast (at least this year...!!), but I sure know how you feel!! The 4-5 months it took to sort out my electrical non-start issues last year would have to give you heart to solve this one... Then there was the gearbox.... then the brake caliper literally falling off after never showing any sign of a problem!! After reading all your replies, and your own comments, I feel it must be a structural issue 'somewhere'... 'tho what and where I'm afraid I can't help. All other avenues seem to be well covered (??). Let me know when next you will be having a look at the thing and I'll come up as an extra pair of hands and someone to swear at as you check... always seems to work for Matty 'Ambrose' when he's worked on mine!! Besides, I owe you some...
Just thought of a 'possible'.... could it have anything to do with engine mounts (loose, etc), or tailshaft.... causing vibration under deceleration??
How is your steering rack Lloyd? It may be transferring some false information to your hands under deceleration. If the rack shifts forward under braking it would cause the wheels to toe in and out in a reverberation that would give the symptoms you have. Worth a look.
Drives as smooth as silk under acceleration(and deceleration). Corners without any drama, in fact, it's a delight to drive until you touch the brake pedal(then all Hell breaks loose). The thread by loud'n'proud scares the shit out of me. His car has disintegrated in the exact same area that mine has just been re-welded. Two Z32's with almost identical damage at the same time, and no previous reported instances of similar problems amongst the mass of information on these sites???
Steering Rack has new Energy Suspension bushes fitted and seems fine, but I will check them again(at this point I'm not prepared to discount any theory). Thanks Wayne.:zlove:
I am with Ross I think Lloyd it still sounds like a run out problem. I had a very similar instance when I got my new front brake package and it became worse as the rotors and pads became glazed. Maybe drop it into Kevin at SBC and get em to check the discs for run out. How long ago was it that you had the discs machined or replaced and how long after did the problem arise
Hey Bro.... Have you considered the front struts. Any loosness in the bolts at the top at your guards & strut bracing. This could also cause the same problem to happen randomly. Just a thought. Other than that I would suggest you stop braking heavily over speed humps. and intersection approach strips. :bash: :bash: Cheers Kerry :zlove:
Maybe I haven't explained this clearly. This problem surfaced on the way home after having new OEM Front Wheel Bearing fitted. It was NOT constant(would happen sometimes and not at others). SBC checked the brakes and machined the discs two days before Easter this year. They discovered a 15thou runout in the R/H hub. This was subsequently replaced with an undamaged hub. New Greenstuff pads were fitted. The problem still exists.
KEZA, I have NEVER shown any consideration for my front struts(and they have reciprocated in kind). I do not make a habit of hanging around with loose sluts.....err, sorry...loose struts, and no, my nuts don't need tightening. Accelerating over speed humps is my normal method of reducing tyre wear(the distance covered during each high speed jump saves a considerable amount of rubber loss when added over a period of time). Surely you know that already(I learned it from you).
Im interested to see the outcome Chili As I have been experiencing the EXACT same problem as you. I can add though that i have NOT replaced a wheel bearing recently and The strange thing was that I noticed my problems occurred soon after when a stone chip got caught between my rotor and pads and cut a deep groove in my rotor. Then i got the rotor remachined and pad surface cleaned up and it fixed the problem only to have it reoccur again soon after. I have to say though that my rotors are on there last legs and that run off idea could be a thought. Mike
I havent read the prior pages so sorry if its already been answered, but have they since been rechecked? With the car jacked up, shake the shit out of the wheel. Is there any play?
Some other things to checks 1) Wheel nut torque. Over torquing can warp rotors 2) Were the rotors machined ON the car, they should have been 3) Any play in the kingpins ?
WELL, with that said... I hope your present wife is prepared for, what inevitably could mean abstinence from marital bliss, when your front end falls off. You mentioned several items that you had checked, but one that did not come up on your list was, your front struts & their mounting onto the front guards. If by chance these mounting points were not as tight as they should be, then yes, you would get the same effect as you presently have with the shuddering. They don't have to be loose by very much, just enough to allow movement. DON'T rule the possibility out...CHECK THEM. After all, you've checked just about everything else there is to check. Cheers Kerry :zlove:
KEZA, When it does drop off, it won't be from mishandling(nor from a lack of proper care and maintenance). Every aspect of the suspension/shocks/springs has been checked on three occasions during the past two weeks(by a very reputable suspension workshop at Granville). The same workshop that discovered the splits in the chassis rail/lower radiator support area. I was however, somewhat reluctant to allow them to check the condition of my nuts. The discs were machined off the car, partially because to machine them in situ when the hub has demonstrable run out, would seem pointless(that hub has since been replaced), but mostly because SBC was astounded that anyone would want them done in any other way. Given their reputation in the industry, I feel they have the runs on the board(a feeling shared by ZX2NV and JP).
Yes, remember the failure bellcurve for bearings? First 5% of design life and last 5% are the highest failure time. That's why I hate new planes
UPDATE Went to have the front wheels re-checked for balance this morning. Wheel balance was perfect as is. Mechanic took the car for a test drive and returned convinced that the discs are warped. Now all I have to do is convince Specialist Brake & Clutch that this is the case(seeing as they are the ones who machined them two days before Easter). Anyone got a pair of 324mm front discs in known good condition, that I can borrow for a test?
Stand open for correction understand disc bite due to incorrect run in . research Brakes, research your brake system & due to latest posts research your Suspension. I will be doing mine,
