They may well have a piece of metal pipe kicking around which just so happens to be the correct size.
Here you go Symon, I fitted my powerflex bush today so took some measurements for you. Hope they help if its not too late.For the 2nd time we are having issues with the dogbone/gearbox mount on our G.
It is a rubbish design, the hole inside the large end which fits into the subframe is larger than the bolt which goes through it and the mount relies on the clamping force of that bolt to stop the mount moving around.
For the 2nd time now we are getting problems with the bolt either stretching or the subframe distorting which has resulted on the mount moving around and the exhaust or something hitting the subframe whilst pulling away or changing gear.
I am thinking of machining up a bush to take up the slack between the bolt and the hole in the subframe.
I don't suppose anyone has the size of the hole at the large end and the size of the bolt? I think the bolt is M14 but I am not 100% sure...
I wasnt sure if I should fit a yellow or black one so bought both to see how much difference there was in the hardness. There was very little actually and I figured the movement in the unmodified one was down to the holes and not the rubber itself so I went with the black one as its more discreet. I think filling the holes was what made the difference rather than the hardness of what material it was filled with. As a result I have a spare yellow one now so will measure the PU cylinder tomorrow to find out the size of that. As symon was thinking of machining one from stainless I thought it best to take accurate measurement from the original bushes themselves. The holes in the original bush is only a rough casting anyway so not exactly precise.I had the standard yellow one fitted on my manual 1.4 MA.
Noticeable difference indeed. No more clunking when shifting,
and during load shifts.
From your measurements the duameter difference between bolt and hole is 10mm.
Granted I didn't measure, but the PU cylinder wasn't 5mm thick.
Yet the mechanic confirmed that the fit was snug.
I used a torque wrench but you can get away without one. As symon said , very tight is good enough. Not sure Id use thread lock on any of them though, The ones I took out didnt have any on them from the factory and they are so tight theres little chance of them coming undone, plus the thread lock will act like a bit of lubricant and you run the risk of over tightening.Hi
Did you use a torque wrench or just did it up tight?also I thought that there were only two bolts you have to undo...why the third?