To Locktite it or not?

[Escape08]

Hey guys,
I have a Weber 32/36 installed on my 1984 Isuzu pickup truck. I installed the Weber 4 years ago and today I hear a hissing sound while idle. The hissing sound is coming from the Weber carb and when I wiggle it, it's kinda loose. I didn't used Locktite or any tread locker on the manifold stud bolts. I will be re-doing it again this weekend. Any recommendations to lock the studs into the manifold by using Locktite or any tread locker? The manifold stud looks like this https://zcardepot.com/products/webe...QkmgCcKyRE6xdzVOKIaYln11zmExHluRoCUJIQAvD_BwE

 

[tasch72]

I'd just use a medium strength removable like loctite blue 242. If the studs come loose again, use permatex orange threadlocker (high strength removable)

 

[kschachn]

Hey guys,
I have a Weber 32/36 installed on my 1984 Isuzu pickup truck. I installed the Weber 4 years ago and today I hear a hissing sound while idle. The hissing sound is coming from the Weber carb and when I wiggle it, it's kinda loose. I didn't used Locktite or any tread locker on the manifold stud bolts. I will be re-doing it again this weekend. Any recommendations to lock the studs into the manifold by using Locktite or any tread locker? The manifold stud looks like this https://zcardepot.com/products/webe...QkmgCcKyRE6xdzVOKIaYln11zmExHluRoCUJIQAvD_BwE

You mean other than using a thread locking compound?

Did you use those lock washers in the picture?

 

[Escape08]

You mean other than using a thread locking compound?

Did you use those lock washers in the picture?

I don't remember seeing it when I installed it. So I went back and I looked on the sellers Weber kit, it looks like it didn't came with it. Just bolts, studs and plain washers.
https://www.ebay.com/itm/3339177455...0z2TjSGDp614SaaKa+FJPW+6C0|tkp:Bk9SR4iQ_qLfYA

 

[Escape08]

I'd just use a medium strength removable like loctite blue 242. If the studs come loose again, use permatex orange threadlocker (high strength removable)

Noted, I'll be heading to AutoZone or O'Reiley this weekend. I might choose this or the locked washer? thanks.

 

[tom in boise]

Lockwashers aren't worth a **** IMO.

Red Loctite or self-locking nuts.

This is true. Also, on a gasketed joint, the gasket can gradually compress, thus losing the preload torque and resulting in a leak. So self locking nuts or loctite.

 

[RooflessVW]

Noted, I'll be heading to AutoZone or O'Reiley this weekend. I might choose this or the locked washer? thanks.

242 is only good to 300°F.

 

[Jump1]

I'd throw out the star washers and replace with a flat and split washer and call it a day. Think they hold better than star lock washers If it ever came loose again in future, I try the blue 242 or Vibratite threadlocker. Suggest not using anything higher strength as they would likely require torch heat if you ever needed to remove in future on a 5/16 or 8mm stud and that's not a location I'd want to put a torch to.

 

[tasch72]

242 is only good to 300°F.

shouldn't be a concern for carburetor studs. better to use 242 blue than 271 red and have to torch out studs near gas.

 

[Escape08]

Based on the replies, Loctite won against lock washers. I will head to O'Reily or AutoZone to buy Loctite 242. Thanks for all the replies everyone

 

[Chris142]

Don't loctite anything here. The gaskets shrink and the hold down nuts need to be checked occasionally

 

[wpod]

Don't loctite anything here. The gaskets shrink and the hold down nuts need to be checked occasionally

Get a new gasket as well.

 

[Oily_Thing]

Split lock washers and locate.

 

[Oily_Thing]

Locktite

 

[xmanjeff]

would it be the studs coming out of manifold or the nut coming of of threaded stud ?
would it be of any benefit to double nut the stud and screw into bottom of threads of manifold so they stay in there ?

 

[Trav]

Loctite the studs into the manifold with blue loctite and use these washers, they will never come loose again. A bit pricey but you get what you pay for.

https://www.amazon.com/Wedge-Locking-Washer-Carbon-Coated/dp/B007VAW24E/ref=asc_df_B007VAW24E/?tag=hyprod-20&linkCode=df0&hvadid=312316762058&hvpos=&hvnetw=g&hvrand=7111583099545424250&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9001771&hvtargid=pla-593845729434&psc=1

 

[paulo57509]

Split washers really don't do much. Fastener tightness is accomplished thru the production of stress in the threads (proper torque). Split washers become essentially flat washers well before proper torque is achieved.

 

[T120]

Locknuts

 

[Soft Cars]

I think it's a good idea if you have an application where the threads are clean. I'm always working on stuff where the threads are already full of anti-seize. Maybe if I get new steering knuckles and new brake calipers someday, I can start using Locktite.

 

[PontiacHO]

Locktite to secure the studs if they are loose. A flat washer, star washer, and then the nut. They will need to checked/tightened periodically anyway due to carb to manifold gasket shrinking and inherent vibration characteristics of that engine… Some folks argue that a star washer isn’t very good but they are used on flywheel-flex plate to crankshaft bolts and perform as designed.