bmwcarmagazine.com Forum Index » 3-Series » From The Project: The Right Tools For The Job Goto page 1, 2, 3, 4, 5, 6, 7  Next    View previous topic :: View next topic  From The Project: The Right Tools For The Job Posted: Sat Mar 31, 2007 1:41 pm Neil Established   Joined 22 Jan 2002 Posts 17309 Location Woking, Surrey But sadly, ultimately, no success. Still - I hope this makes a good read: http://mukerji.co.uk/car/wol/project.x?blog=1&entry=33 _________________ blog | twitter Posted: Sat Mar 31, 2007 1:57 pm Roofer Forum Moderator   Joined 31 Jan 2004 Posts 19711 Location Dunno. Jammy bast on the neighbour front Diff whining?....oh Do you think its a bearing, or the CWP? Posted: Sat Mar 31, 2007 2:00 pm Defector Fanatic   Joined 16 Jun 2003 Posts 8898 Location Rustington, West Sussex Ah, bastard! Thats a bit of a kick in the nuts. At least you know you've got a new bearing and pads on now though I suppose. Handy having access to those tools, does that job even look possible without them? _________________ Previous Cars: E30 316i / E36 318i / E39 528iA / E39 528i Current Car: E39 540i [Updated: 26/07/10] Posted: Sat Mar 31, 2007 3:10 pm Neil Established   Joined 22 Jan 2002 Posts 17309 Location Woking, Surrey Roofer wrote: Diff whining?....oh I thought it'd cheer you up. Thing is, it's not whining - just rattles off throttle. Quote: Do you think its a bearing, or the CWP? What's a CWP? _________________ blog | twitter Posted: Sun Apr 01, 2007 10:19 am Ian332isport 3 Series Moderator   Joined 26 Feb 2003 Posts 2350 Location West Sussex Neil, Sorry to hear this has not fixed the problem. I guess you won't need my trailing arm any more now . Neil wrote: What's a CWP? Crown Wheel & Pinion (the geary bits ). It's quite rare for an E30 CWP to wear. It's normally bearings that go. Mine made a shocking amount of noise before the bearings were replaced, but it's silent now. If you are not going to use the services of a tame rally driver for the rebuild, you could do a lot worse than trying: http://www.hardyengineering.co.uk/ Ian. Ian. _________________ Posted: Sun Apr 01, 2007 10:32 am Roofer Forum Moderator   Joined 31 Jan 2004 Posts 19711 Location Dunno. Quote: just rattles off throttle. Yes, and the Diff? The bearings are not over complicated, i'd look at the pinion shaft one first. The main agg is the amount of shimming, dial gauge at the ready. Posted: Sun Apr 01, 2007 10:57 am George Established   Joined 15 Jan 2005 Posts 12084 Location London Annoying about the lack of noise resolution. Hope it won't cost crazy money to sort. _________________ 1986 E30 325i Cabriolet, Alpine White Posted: Sun Apr 01, 2007 11:14 am M3 Compact Administrator   Joined 18 Apr 2004 Posts 41051 Location Reality. Quote: Thing is, it's not whining - just rattles off throttle. Silent with power on? _________________ Posted: Sun Apr 01, 2007 1:55 pm Neil Established   Joined 22 Jan 2002 Posts 17309 Location Woking, Surrey M3 Compact wrote: Quote: Thing is, it's not whining - just rattles off throttle. Silent with power on? As far as I can tell over the exhaust(!), yes. Anyone know if SAF-XJ is the correct differential oil for it, and whatever is correct, where I can source some? _________________ blog | twitter Posted: Sun Apr 01, 2007 2:08 pm Roofer Forum Moderator   Joined 31 Jan 2004 Posts 19711 Location Dunno. Quote: the correct differential oil for it, and whatever is correct, where I can source some? I used to take a bottle up the dealers with the M535 diffs, it was a bastard to get hold of. Posted: Sun Apr 01, 2007 2:14 pm M3 Compact Administrator   Joined 18 Apr 2004 Posts 41051 Location Reality. Neil wrote: Anyone know if SAF-XJ is the correct differential oil for it, and whatever is correct, where I can source some? SAF-XJ is the current recommended oil (£40 worth), when the car was new, B373 was the recommended oil. (£10 worth.) Not sure I'd be in a hurry to potentially waste £40 worth of SAF-XJ, Neil. Unlikely to fix it imo. No chance you could get the diff out and bring it to Driffield? _________________ Posted: Sun Apr 01, 2007 2:24 pm Ian332isport 3 Series Moderator   Joined 26 Feb 2003 Posts 2350 Location West Sussex Neil, You can get SAF-XJ from Opie oils. http://www.opieoils.co.uk/performance_lubricants/castrol.aspx Cheers, Ian. _________________ Posted: Sun Apr 01, 2007 2:46 pm Neil Established   Joined 22 Jan 2002 Posts 17309 Location Woking, Surrey M3 Compact wrote: No chance you could get the diff out and bring it to Driffield? That's entirely possible. What happens then though - are you offering to have a gander? _________________ blog | twitter Posted: Sun Apr 01, 2007 2:48 pm Neil Established   Joined 22 Jan 2002 Posts 17309 Location Woking, Surrey Ian332isport wrote: If you are not going to use the services of a tame rally driver for the rebuild With reference to my post above and this quote, I feel like I've missed some information somewhere. _________________ blog | twitter Posted: Sun Apr 01, 2007 3:58 pm M3 Compact Administrator   Joined 18 Apr 2004 Posts 41051 Location Reality. Not much point in having a quick gander Neil, it'll need stripping. I could get it rebuilt properly and honestly by a trusted source, probably cheaper than is available elsewhere. They're £40 carriage to ship back tho. However, it warrants a bit of investigation before removal imo. It could be something trivial, does it sound worse than mine did on the road sections at Weston Park? (Brake pad causing it.) I'd be getting the rear up in the air with it running and crawling underneath for a listen. _________________ Posted: Sun Apr 01, 2007 5:20 pm Neil Established   Joined 22 Jan 2002 Posts 17309 Location Woking, Surrey M3 Compact wrote: Not much point in having a quick gander Neil, it'll need stripping. I could get it rebuilt properly and honestly by a trusted source, probably cheaper than is available elsewhere. They're £40 carriage to ship back tho. Sounds like an interesting option. Can you PM me more info' and estimated cost? Quote: However, it warrants a bit of investigation before removal imo. It could be something trivial, does it sound worse than mine did on the road sections at Weston Park? (Brake pad causing it.) No, it doesn't sound that bad. Quote: I'd be getting the rear up in the air with it running and crawling underneath for a listen. Been there and done that twice. I've disconnected the off side half shaft and at that point the noise goes away - hence I had become convinced it was the wheel bearing on that side. _________________ blog | twitter Posted: Sun Apr 01, 2007 6:04 pm M3 Compact Administrator   Joined 18 Apr 2004 Posts 41051 Location Reality. Quote: Can you PM me more info' and estimated cost? If it was mine I'd have a look myself, but as you're 200+ miles away I'd seek a more expert opinion from the (close personal friend) diff guru at the workshop. It's impossible to guess, worst case scenario for a full CWP/LSD rebuild would be around £120 labour plus parts at cost. Iirc, the side bearings are around £50/pair, if that's all that was req'd, it wouldn't be expensive for the labour) Quote: I've disconnected the off side half shaft and at that point the noise goes away - hence I had become convinced it was the wheel bearing on that side. Couldn't you discern whether it was inner or outer located? Tried swapping the shafts over? (Or replacing the O/S shaft?) If it isn't the shaft, it could be anything. Bearings might be favourite, but disconnecting the shaft unloads other things inside the diff. Did you try pulling the handbrake on while it was running? This loads the diff and can help pinpoint noises. _________________ Posted: Sun Apr 01, 2007 6:54 pm Neil Established   Joined 22 Jan 2002 Posts 17309 Location Woking, Surrey Quote: Couldn't you discern whether it was inner or outer located? Tried swapping the shafts over? (Or replacing the O/S shaft?) I've not got the tools to completely remove the half shafts. My next plan is to swap out the differential completely, but for that I'd obviously require another diff! As for pinpointing the noise, it only makes it when the engine isn't providing positive drive. So I can't be under the car while it's making the noise, as it doesn't take long to spin down to idle at which point the engine provides torque and the noise stops. My currently theory is that it's something on the right side output of the diff that makes the noise when the wheel is turning the engine, rather than the engine turning the wheel. _________________ blog | twitter Posted: Sun Apr 01, 2007 10:32 pm M3 Compact Administrator   Joined 18 Apr 2004 Posts 41051 Location Reality. Load related noises are usually a meshing issue, but I'd expect it to whine at speed. Not affected by cornering L/R at all? Quote: rattles off throttle Rattle as opposed to 'knock'? Is it deffo wheel speed related, as opposed to (faster) prop/input speed related? Tried pulling the handbrake lightly while it's making the rattling noise? _________________ Posted: Sun Apr 01, 2007 11:01 pm Roofer Forum Moderator   Joined 31 Jan 2004 Posts 19711 Location Dunno. CV singing? 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