Banjobolts again x 2

I'm happy it wasn't any damage to that pretty CSI, Terje

When putting the covers back on. How much torque and how do you seal them. Do you wait for it to dry before you apply pressure? How do you do this?
I want to do it myself, but want to be sure about everything.

Ask Engl Thomas
There is a fix for Banjobolts..

LINK to his Homepage..

I have a fix for the banjo bolts. Got it from Harry in DE

You need the locking wire kits for the Banjo bolts. Makes sure they never come loose again.

Zitat von huldra66;105153

Two cars in my garage with open hood

Checking of Banjobolts and other preventive maintenance like gasoline hoses and wather hoses.

One car with 125k km and the other 225k km
And guess what , 6 loose ones on my car and 4 loose on the other
Luckily no damage to the camshafts

Alles anzeigen

A very typical M70 picture. I dare to bet that there isn't a single M70/S70 out there which does not have or had this issue.
Did you also check the cam timing?

Cheers
Wolf

I cleaned everything with brake cleaner and then re-mounted the bolts using Loctite.

the cam timing tool in in my mailbox, just pick it up this afternoon.

My car did not have any loose banjo bolts with ~150k km on the clock, but I lockwired them just like Gerry did just in case

can you tell me how much torque to put on the banjo bolts?

Zitat von huldra66;105175

Cam timing is on the plan as well, but we felt that we did a good job yesterday dismanteling both cars , so we stopped there.
I see there is a lot of suggestions on hove to prevent / fix those bolts, but have also heard that byuing new bolts with treadlocking coumpound already applied is more then good enough

What do you guys think??

Regards
Terje

Alles anzeigen

As with many tasks like this, different people have differing preferences on locking them, usually dependant on experience and background.

As an old engineer, I prefer to see a positive mechanical lock in there so my vote goes to the wire locking.

I have also seen home made tab washers used but this seems like a lot more effort to no benefit.

I am mildly suspicious of the new bolts using the pre-impregnated loctite as BMW are just using the cheapest, easiest mass production fix.

My least favourite option is applying threadlock to the old banjo's. These will have threads that have been rattling about for many thousands of miles and are oil transfer vessels, so I dont see any solidified threadlocker anywhere near those tiny oil galleries as being a good idea, (any probably why BMW used a dry locker rather than just tell the technicians to use threadlock.)

I am just a split pin man rather than a nyloc nut kinda guy I spose!

Finally, after doing all that, you would be silly not to reset the cam timing.

Zitat von Fatandre;105184

can you tell me how much torque to put on the banjo bolts?

Torque to put on the banjo bolts should be 12 Nm

In Spain, several 8s have had that problem, I tighten past summer, the 8 screws
2 were loose,
5 loose
1 very well

http://www.e31.es/foro/showthr…llos-del-carril-de-aceite

It's would be best to replace the banjo-bolts completely. The pre-applied threadlocker may work, but you'll never be sure. It may be OK for a year or two and then... However, I guess for the threadlocker to have the best chance of working you'd need to degrease the female threads.

I would buy a set of new bolts and then drill the heads so that they can be wire-locked, or improvise a fold-over lock washer. Also, I am sure Nordlock washers would work well here, but as they fit in pairs, they may add too much height (?)

http://www.youtube.com/watch?v=mgwmuZuJ02I

..

Much easier (for most) than drilling bolts although probably not certifiable by the Air Force:

Link already posted by Richard (smileitsme)

I quite like the Nordlock video esp. showing that all other methods commonly employed seem to be rubbish...

Cheers
Reinhard

Yes, I quite like that system, Reinhard.

(I never could understand how spring washers would prevent bolts from undoing..)

We have been using NordLock washers at work for some 20 years. Particularly on transport, aerospace or military equipment, they do work very well.

But for banjo-bolts, normally a soft crush washer of copper or aluminium is used (like on oil-drain plug) to provide a seal. The Nordlock washers would not provide a tight seal, although I suspect a tiny leak would not matter too much here.

Still, I think your method looks simple and very good.

I got plates like this from 8harry8 and they were made from copper.
Is it possible that those plates could fall off the banjo bolt?
I havent mounted mine yet