Bizarre EXUP self-test behaviour

[roxburd]

The Mounting plate can wear on the inside and can cause side play and a bit of noise, however it does not effect the operation of the valve. Mine is worn enough and has a ridge, but works fine. (40000miles). Last time mine was rattling it was because I had to much slack in the cables.
The bush in the mounting plate is very easily removed, but be aware it is pushed out from the inside. I remove them using a vice and either 9 or10mm socket (cannot remember which) on the inside and a 21 mm on the outside.  Bushes are around £45 each. It will do no harm to replace it. The plate is around £125

D'Oh! Too much slack in cables - that'll be the first thing to check then! Thanks, I should have thought of that. Haynes specification says 1.5mm cable free play (but not how it's measured) but the text says half a turn on each of the adjusters - I guess it's just a matter of finding the sweet spot really.

[robbo]

I'd have thought an engineering shop could make bushes for less money, if either of them was the problem. Even have them custom made to factor in any wear. Just a thought.

[unfazed]

Unfortunately they are not a normal steel or brass bush. Last time we had to cut one that was seized we found it to be an extremely hard brittle item. We cold not determine what it was made of. They do come up occasionally on eBay as new old stock for around £25.

[celticbiker]

I should imagine they are made of phosphor bronze.

[unfazed]

Did not think so any Phosphor Bronze bush I ever saw were Bronze in colour the one in the EXUP has a polished steel look

[NorthWestern]

IIrc They are ceramic