Bongo Fury

brianjeff50 wrote: Sat Sep 08, 2018 8:58 am A couple of the tyres on our alloys keep slowly losing pressure. The local tyre depot said its rim corrosion and a common Mazda problem. They removed the tyres, cleaned the sh1t off from round the rims, smeared anti corrosion grease round and re-fitted.
Unfortunately the problem hasn't gone away. What's my next step? Can I get the wheels more extensively treated or are they knackered?

teenmal wrote: Sat Sep 08, 2018 11:05 am Worth a try...…..

https://www.toolstation.com/shop/p85154 ... e%20sealer

Flanners wrote: Sat Sep 08, 2018 4:14 pm Alloy wheels degrade and become porous and or corrode allowing air to escape the only way to resolve the issue is to have them refurbished or you could try a nitrogen fill as this apparently has bigger molecules which permeate more slowly?!

I had mine refurbed end of last year in anthracite, as the one's on my van were in a truly awful state yet the bodywork and chassis is absolutely mint, perhaps as the garage has indicated Mazda have a bad rep for alloy wheel finish and longevity.

mikeonb4c wrote: Sat Sep 08, 2018 7:10 pm

Flanners wrote: Sat Sep 08, 2018 4:14 pm Alloy wheels degrade and become porous and or corrode allowing air to escape the only way to resolve the issue is to have them refurbished or you could try a nitrogen fill as this apparently has bigger molecules which permeate more slowly?!

I had mine refurbed end of last year in anthracite, as the one's on my van were in a truly awful state yet the bodywork and chassis is absolutely mint, perhaps as the garage has indicated Mazda have a bad rep for alloy wheel finish and longevity.

Out of interest which wheels are Mazda alloys? Is it those 15" 5 spoke ones? There seem to be a lot of different types fitted (mine are jap fitted aftermarket Precious diamond cut 17" alloys, and they also got a bit leaky with age, now cured it seems by refurb and powder coating). I'm wondering if maybe the tyre fitters are making it up as they go along?

windywatson wrote: Sun Sep 09, 2018 7:53 pm Hi,
Not uncommon problem with all brands of motors with all brands of alloys. Had this pronblem with many alloy wheeles over the years as they've got older & corrossion has set in. Whenever I have my tyres changed I ask for them to ensure that the rims are cleaned well & that the more heavy heavy duty rim sealant used when the new tyres are fitted. I have used the same tyre depot Dexell Tyres for longer than I can remember & have built up a good relationship with the staff. when I first had the issue of air loss due to leaky rims. I noticed that when I went back to the van the rims had a thicker pink residue arount the tyre bead. When I pointed out that it looked different to the usual stuff you see left around the tyre. I was told that it was a product they use to help seal rims if they know there is likely to be problematic. So I always ask if they would kindly use that when I have tyres fitted. It has reduced the problem for me , but ultimatly its a refurb that is usually the fix all.

Cheers