Crown Automotive J4004109 Right Exhaust Manifold Stud for 72-81 Jeep CJ and 72-91 SJ & J-Series with V8 Engine
Quadratec Part #:
27601-0028
Crown Automotive Part #:
J4004109
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Details
- Features: Metal
- Shipping Weight: 5lb
- Shipping Dimensions: 25in x 25in x 1in (L x W x H)
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Questions
James S.
It appears to be 3/8 16 on short end and 3/8 24 on long end. what is the length of each threaded section and also OAL?
For the Crown Automotive J4004109 Exhaust Manifold Stud, your assessment of the thread pitch is correct. This is a "stepped" stud designed specifically for the right-side exhaust manifold on AMC V8 engines (304, 360, and 401).
Overall Length (OAL): 2.00 inches.
Threaded Section 1 (Coarse): 3/8-16 thread. This is the "short" end that threads into the cylinder head. The length of this threaded section is approximately 0.625 inches (5/8").
Threaded Section 2 (Fine): 3/8-24 thread. This is the "long" end that extends through the manifold to receive the nut. The length of this threaded section is approximately 1.125 inches (1 1/8").
Unthreaded Shoulder: There is a small unthreaded transition or "shoulder" in the center, typically measuring about 0.25 inches.
Overall Length (OAL): 2.00 inches.
Threaded Section 1 (Coarse): 3/8-16 thread. This is the "short" end that threads into the cylinder head. The length of this threaded section is approximately 0.625 inches (5/8").
Threaded Section 2 (Fine): 3/8-24 thread. This is the "long" end that extends through the manifold to receive the nut. The length of this threaded section is approximately 1.125 inches (1 1/8").
Unthreaded Shoulder: There is a small unthreaded transition or "shoulder" in the center, typically measuring about 0.25 inches.