Exhaust Manifold Stud Nuts
Thread Starter
Melting Slicks
Joined: Sep 2000
Posts: 2,406
Likes: 418
From: Chester Virginia
Exhaust Manifold Stud Nuts
What is the correct type nut to use on the exhaust manifold stud: brass, steel, standard or long length, w/wo lock washers? The nuts keep coming loose and falling off so I am wondering what is the "correct' way to go. The Corvette is a 1973 L-82 w/ automatic.
Roger
[Modified by RMS73, 10:18 AM 7/22/2003]
Roger
[Modified by RMS73, 10:18 AM 7/22/2003]
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
Re: Exhaust Manifold Stud Nuts (RMS73)
They were originally triangular-crimped steel prevailing-torque nuts - Paragon has them; I usually run a 3/8"-16 tap through them first to reduce installation torque required. No washers. :thumbs:
Race Director
Joined: Apr 1999
Posts: 10,866
Likes: 717
From: Beverly Hills/Pine Ridge Florida
Re: Exhaust Manifold Stud Nuts (JohnZ)
I believe that they're called "top-loc" or "top-lock" nuts....just like John describes. They're an "interference" fit on the stud.....keeps 'em from backing off. Chuck
