Stat-o-seal VS Thread Sealing Washers

I think the difference is that the first type seals against the thread and the second seals on the face of the bolt or screw. in other words, the second type will only work with closed/acorn nuts (but will be a lot easier to remove when the time comes).

Regards

WM

 

I used them on my Dino once. I didn't find that they really worked better than the Belleville washers that my mechanic at Algar recommended, in fact, I think they were worse.

The Bellevilles are cupped, which I guess provides some additional tension on the nuts. Also proper torque seemed to help. On the Dino is was 96 INCH pounds, if memory serves me, for the sump and tranny.

The issue on seepage in more from years of removal and replacement of the covers. Neither washer is really going to help with that.

 

Frankly, I wouldn't waste your time or money with any "sealing" washer on the market ---- none really work all that effectively in this application. I just smear / brush on a thin bead of either Hylomar or RTV silicone (depending on situation) around the threads and / or head of the fasteners ---- works great every time

 

The bottom of my engine is dry. Stat-O-Seal washers work great with acorn nuts.
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My bad...not acorn nuts, flanged nuts.
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On which ferrari did you install these washers? And what size are they? If there a part number for these washers?

 

The factory installed washers are indeed Belleville washers, the same as on the cam covers and the cam bearing caps. These should ideally be replaced with new ones when removed and be sure to install them the correct way ie the smaller diameter of the cup against the nut.

 

Sealing washers don't work on oil drain plugs. with or without the copper crushwasher. Trust me.

 

Had about 8 leaks with the regular nuts.

Put in Stat-o-Seal washers and the original nuts back on and now have only one leak and it drips, I bet, a drop or two per month, average.

 

I've never used any magic washers.

Never seen a need.

 

Correct me if wrong. European cars seem to use bellvile washers for lock washers and American use the conventional split lock washer. What in opinion works best?

 

Those aren't Bellevilles, they are wave (also known as "spring") washers.

The only reason they use is them is because of the aluminum parts --- the solid wave washers do not gouge the soft aluminum like a split washer will.

As far as mechanical locking ability, there is no great advantage either way for one over the other.

 

Check out Parker's Thredseal. I used these on my Dino's timing chain adjuster bolts and no leaks. This after I tried a copper washer, nylock nut, and Hylomar. I don't think they have metric sizes so I just picked the closest to my metric bolt.

http://www.allsealsinc.com/thredseals.pdf

 

The trans pan and oil pan used Bellville washers from about the injected or QV on up.


Bottom line is people are trying to seal the stud. If oil is getting to the stud you have already failed. The gasket should be preventing oil getting to the stud.

 

+1

And if using sealant on the gasket it should be run around the inside of the stud holes not the outside.

 

+1 on those 2 last post.