Hi Guys

As soon as I have managed to find the source of my Water Leak (Hoping its not the Rad!)

I am going to put a Mechanical Fan back on but can I use Spring Washers or must they be Star Washers?

Which is best?

 

Either or.

I kept dropping the washers, so a drop of loctite was sooo bloody easy, and lasted until the Efans went on. Same with the 6cyl cars.

Simple is best Alex.

 

Hi Grant

Cheers!

In that case I'll go with Spring Washers, at least until I know that my 'Home Made' Mechanical Fan is working ok.

 

I used flat washers and a bit of loctite. The spring, or locking washers don't resist vibration. Basically nothing works as well as loctite for maintaining clamping force in a vibrating environment.

 

I'd get some nyloc nuts... Or some selflocking nuts...

 

Hi Daim

I thought about using 'Nylocs' but is there enough room to get them in, as that would also be my favored option.

 

Yeah, you'd have to fiddle a little but it would work.

 

Hi Daim

Cheers!

I'll get some of each.

 

There are some really "flat" ones... I've seen them somewhere...

 

I used a lot of Nyloks in my lumping process. And star washers here and there. Spring locks last option.


In one or two places, I flattened the Nyloks, for space reasons. a careful grind of the dome. Too hot and the lock feature is destroyed.


Carl

 

Nylocks just add a bit of friction, they don't resist vibration much better than a regular nut. I don't have any links online, but I have seen technical papers about this and a threadlocking compound was shown tobe the best way to prevent a nut from backing off.

 

I'm contradicting this a little, as Jaguar uses Nylocs on nearly all suspension parts, like the antirollbar links, the fulcrum shafts (on the replacement parts), the lower shock absorber bolts, the upper shock absorber mounts, etc.

If they were not any better than normal nuts, then they would have used the cheaper standard nuts...

 

They are better, just not a lot better (maybe 10%?) under vibration. Quite a bit better in static loading conditions, and that's what you'll see in some suspension components.

I like Loctite because it fills the spaces in between the threads and then water can't get in. It quite effectively prevents the nut and bolt from rusting together in a way other methods can't.

We also know well that Jaguar tended to do things long past their sell-by date too, like using locking wire when their was better alternatives. Given how small their Engineering resources were through most of their history they tended to not change much, even when a better option might be there.

 

Hi Daim

I'm with you on the 'Nylocks' all day long and I've never come across one that ever came undone, that's not to say it couldn't ever happen but I

think its extremely unlikely.

The People who make them would probably have thoroughly tested them under all sorts of conditions, before they ever considered putting them on the market.

If the Fans vibrating that much then it shouldn't be on the Car.

BTW. I want to put New Nylocks on the Track Rod Ball Joints, do you know the size of the Nut and Thread that I would need?

 

Hi Jagboi

I've not had much experience of 'Locktite' how hard is it to get them undone in an awkward place like the Fan Boss?

While I haven't completely ruled it out, sometimes I like to stick with what I know.

 

It's not a single product, there are many grades depending upon what you want to do. They are colour coded, the blue grade (number 242 or 243) is designed to be dissembled with hand tools - i.e. normal spanners or a ratchet and socket will disassemble it.

Red is intended to be permanent, it needs to be heated to over 400F to break the bond, and purple is low strength designed for fasteners 1/4" diameter or smaller.

243 is slightly stronger than 242, as it is designed to be used on fasteners that are oily or not perfectly clean.

LOCTITE 243 - Threadlocker medium strength - Loctite

 

Loctite is brilliant stuff. I use it on everything.

Never used 243, I might get some, with Red you need to ensure the 2 threads are clean or it will fail.

I have used nylock on a drive shaft and they came loose.

 

mine had BIG flat washers (spreading out the clamping force) and Nylock nuts

 

Hi Jagboi@Warrjon

I might get some just to try it out.

No ones mentioned 'Star Locking Washers' Any good?

 

Hi Jonathan

Not much room for Big Washers on this application but I can see where you are coming from.