Never use a lock washer on your Intake Manifold.

Laverda SF

Laverda SF

Hero member
Lock Washers Break and fragments can end up on top of a piston when taking off of the intake manifold ;o(

Say you want to change cams on a Chevy V8.

A 1/8th piece of locker washer falling into an intake can destroy a piston and dimple your heads let alone destroy your valve seats.

Been there NOT plesant ;o(
 
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Be like a surgical nurse, make sure you have ALL the bits on the tray before you let the surgeon sew it up 😉
I’ve had quite a few flattened, spread and broken spring washers on the RGS, far more than I’ve ever seen on other machinery. I now have lots of spares ready whenever I take apart something new.
Not sure why, rubbish quality or over torqued I suppose?
 
Same here. I've never found spring washers particularly useful. I prefer to use Nyloc nuts or Loctite on things that tend to vibrate loose. On stuff you really don't want to rattle loose, you should use a positive locking system like a bent tab washer, lock wire, or split pin through a castellated nut.

This video is intended as marketing propaganda for Nord Lock, but the comparative tests of various washers and nuts looks reasonable enough. I've read independent engineering reports which conclude that as far as nut locking is concerned, split spring washers are actually worse than no washer at all.

 
Dellortoman said:
Same here. I've never found spring washers particularly useful. I prefer to use Nyloc nuts or Loctite on things that tend to vibrate loose. On stuff you really don't want to rattle loose, you should use a positive locking system like a bent tab washer, lock wire, or split pin through a castellated nut.

This video is intended as marketing propaganda for Nord Lock, but the comparative tests of various washers and nuts looks reasonable enough. I've read independent engineering reports which conclude that as far as nut locking is concerned, split spring washers are actually worse than no washer at all.

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Interesting video Cam. Definitely had a whiff of marketing about it, particularly when it said that Nordlock doesn’t rely on friction, when clearly it does between the nut and the nordlock…
But the test results are very interesting. I guess I’ll be looking at other methods 😁
 
I don't think it is friction - it's almost like a ratchet, but a schnoor type washer that also creates indentations doesn't rely on the added 'different angle' principle. Not sure why they need that double washer setup, but I reckon they might have done their homework and know a little bit more about it than me!
 
NordLocks are very good. I have used them on CV axle bolts that typically use schnoor washers and require re-torquing days after being run to avoid the CV joints from loosening.

The only disadvantage aside from cost is they (6mm or 8mm bolts) are around 2.5mm thick. Not helpful on some tight areas or short threaded studs.

They are reusable.
 
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