Description
Product Overview
The DNJ Head Spacer Shim is a precision‑engineered component designed for 62-02 Chevrolet and GMC V8 engines ranging from 4.6L to 5.7L. Constructed from high‑strength steel alloy, the 0.020‑inch thick shim sits on the engine block side of the head gasket, providing a consistent, uniform gap that helps maintain proper head torque and gasket seal. Its compact dimensions (15 x 12 x 2 inches) and lightweight design (9.6 ounces) make it easy to install during routine head work or a full engine rebuild. Manufactured by DNJ Engine Components, a trusted name with over 30 years in the automotive aftermarket, this shim meets OEM specifications and is listed under ASIN B00TM1AMJW.
Usage
This shim is intended for use in both street‑driven vehicles and performance‑oriented builds where maintaining exact head clearance is critical. Install the shim on the engine block side of the head gasket before torquing the cylinder heads to factory specifications. It is especially beneficial for engines that have experienced head gasket failure due to uneven torque distribution or thermal expansion. 
Why Choose Us
Choosing DNJ means selecting a product backed by decades of engineering expertise and rigorous quality control. Each shim undergoes dimensional inspection to guarantee the 0.020‑inch thickness tolerance, ensuring consistent performance across all units. DNJ’s extensive distribution network and commitment to OEM‑level standards provide confidence that the shim will integrate seamlessly with your engine’s existing components. Additionally, our customer support team offers detailed installation guidance and technical assistance for any fitment questions.
Key Features
- Exact 0.020‑inch thickness for precise block‑side clearance
- High‑strength steel alloy construction for durability under high compression
- Designed specifically for 62-02 Chevrolet and GMC 4.6L‑5.7L V8 engines
- Easy installation with no additional machining required
- Backed by DNJ’s 30‑year reputation for quality engine components
FAQ
Will this shim fit a 5.3L V8 engine?
The DNJ shim is calibrated for the 62-02 engine family, which includes 4.6L, 5.0L, and 5.7L V8s. While it may physically fit a 5.3L, we recommend using the shim specified for that exact engine code to ensure proper clearance.
Can I install the shim myself?
Yes. The shim is a bolt‑on component that sits on the block side of the head gasket. Follow the service manual’s torque sequence and ensure the surface is clean before installation.
What is the warranty on this product?
DNJ offers a limited one‑year warranty against material defects. Contact our support team with your purchase details for a replacement if the shim fails due to manufacturing issues.
Do I need to replace the head gasket when using this shim?
While not mandatory, it is best practice to replace the head gasket when installing a new shim to ensure a fresh seal and optimal performance.
Is this shim compatible with aftermarket performance heads?
The shim’s 0.020‑inch thickness is designed for OEM‑type head clearances. If you are using aftermarket heads with different thickness requirements, verify the needed shim thickness before purchase.
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