Thread: Urgent: How can I stop bolts from continually coming loose

Originally Posted by johntins

Not a bad idea. Haven't come across that before, but simple. If you can get the studs.

Dave, spot on, I have some ARP studs with the allen head in the end of the stud scavenged from a motor that was never finished.
The studs will have to be fitted with everything in situ, major job removing the Heat Exchanger, if the studs I have are not suitable, have a friendly engineer with some nice machinery to make them up.
John if the studs were fitted first into the block there would be not enough room to get the bracket in place, piece of **** with the engine out.
The only hassle with the 2 bolts fitted this arvo was that the bolt shanks were about an 1/8" too long, so I had to grind and taper the shank and run a Die Nut up and extend the thread length accordingly, see what happens tomorrow, Regards frank.

G'day Frank,
Almost there!!!! Gee I thought working on my Leyland Mini Clubman was hard. Not anymore!!.
Chris

Bought 2x 3"x 7/16" inch bolts and cut them down and made studs, the top front one had to be 1/4" shorter and a heavy taper on the start of the thread just to be able to get it in to it's spot.
Couldn't get the block end of the thread to bottom out, so had to take it back out and shorten the Nut end of the stud an 1/8", then fit the Nyloc nut so one or two threads were through the nyloc part of the nut.
With the nyloc nut fitted to the shortened stud we could just get the block end of the stud started (heat exchanger was the culprit, in the way), so managed to bottom the stud in the block and wind on the nyloc nut a few more turns to reach the Torque value of F.T..
So finally got the bugger back on nice and tight, going on a run tomorrow so will see if it comes loose again, the last bolt (shortest) we just replaced with this much shortened stud only had about a 1/4" purchase in the thread in the block, so I would say Definitely not a Factory fitted item, thanks again for all the great advice, much obliged, Regards Frank.

Originally Posted by Tank

Dave, spot on, I have some ARP studs with the allen head in the end of the stud scavenged from a motor that was never finished.
The studs will have to be fitted with everything in situ, major job removing the Heat Exchanger, if the studs I have are not suitable, have a friendly engineer with some nice machinery to make them up.
John if the studs were fitted first into the block there would be not enough room to get the bracket in place, piece of **** with the engine out.
The only hassle with the 2 bolts fitted this arvo was that the bolt shanks were about an 1/8" too long, so I had to grind and taper the shank and run a Die Nut up and extend the thread length accordingly, see what happens tomorrow, Regards frank.

That Dave... not just a pretty face... ☺

Just a thought make sure you the loctite primer this may help alse have you tried shake proof internal star washers.
Rocky

Sent from my SM-G920I using AULRO mobile app

Originally Posted by justinc

That Dave... not even a pretty face... ☺

Fixed it for you...

its configured for radio work.

its kinda like the dentist "we cant show you his face" tooth paste add but its got nothing to do with the privacy for me, its just that most people dont spend their time under their vehicles trying to look up past the engine Im spannering on.