Does heating hub damage rear bearings?
Posted: Mon Jun 14, 2010 8:26 am
Hi all,
Since I was 1000+ miles I went on a long shake-down run to Devon and back this weekend. It was moderately eventful but the main issue as I came back into London last night was a cyclical rubbing noise from the rear left. It did not diminish with braking. Was mainly noticable as you slow down to a junction. I was repeating at once per wheel revolution. It was late so I just put the car in garage last night and fell asleep watching F1 on iPlayer.
This winter I re-did the whole rear with Spyder CV/donut system. This included sending the hub carriers to Spyder to fit the new axles (Kelvedon hi-spec jobs) and bearings. My tools and I were only just up to removing the hubs. The axles I could not.
Unfortunately I reassembled using coppa-slip. This resulted in an annoying creak from the hubs. The cause of this is cavitation as the moving grease causes a vacuum (well known from bicycle cranks but I was not thinking). Spyder advised to take off, remove grease and valve-grind the stub and hub. However I could not get the rear left hub off again. Using a small Sealy Hydraulic puller (I'm bolt-on wheels not spinners) and applying heat from a butane torch just made the coppa slip bubble out a bit. I tourqued the hub nut back to 100lb/ft and squeak went away.
So now after a 1250 miles I have a troublesome cyclical noise. Could the heat that 5 minutes with butane can apply have damaged the bearings? Any other thoughts/wisdom on the matter?
I will be investigating further this evening...
Since I was 1000+ miles I went on a long shake-down run to Devon and back this weekend. It was moderately eventful but the main issue as I came back into London last night was a cyclical rubbing noise from the rear left. It did not diminish with braking. Was mainly noticable as you slow down to a junction. I was repeating at once per wheel revolution. It was late so I just put the car in garage last night and fell asleep watching F1 on iPlayer.
This winter I re-did the whole rear with Spyder CV/donut system. This included sending the hub carriers to Spyder to fit the new axles (Kelvedon hi-spec jobs) and bearings. My tools and I were only just up to removing the hubs. The axles I could not.
Unfortunately I reassembled using coppa-slip. This resulted in an annoying creak from the hubs. The cause of this is cavitation as the moving grease causes a vacuum (well known from bicycle cranks but I was not thinking). Spyder advised to take off, remove grease and valve-grind the stub and hub. However I could not get the rear left hub off again. Using a small Sealy Hydraulic puller (I'm bolt-on wheels not spinners) and applying heat from a butane torch just made the coppa slip bubble out a bit. I tourqued the hub nut back to 100lb/ft and squeak went away.
So now after a 1250 miles I have a troublesome cyclical noise. Could the heat that 5 minutes with butane can apply have damaged the bearings? Any other thoughts/wisdom on the matter?
I will be investigating further this evening...