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Engines and Components› Camshafts and Valvetrain

OTC

DOHC Camshaft Retaining Tool Set

Name: DOHC Camshaft Retaining Tool Set
Brand: OTC
SKU: 6691

$98.78 $70.66 Save $28.12

SKU: 6691

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Moderate — 2–4 hours

Overview

The OTC 6691 is a camshaft retaining tool set designed for GM 2.8L, 3.0L, and 3.6L DOHC engines. This set features oversized retaining plates that lock the camshafts together at top dead center (TDC) to prevent them from turning while setting engine timing. It includes three retaining plates, with one used for tightening one set of cams and two used in conjunction for the second set.

Show original supplier description

The OTC 6691 Camshaft Retaining Tool is an essential tool for mechanics working on GM 2.8L, 3.0L, and 3.6L DOHC engines. This specialized tool set utilizes oversized retaining plates to effectively lock the camshafts together at top dead center (TDC). By holding the camshafts securely, these plates prevent them from rotating while the engine timing is being set. The set includes three plates: one is used for tightening a set of cams, while the other two work together to secure the second set. This design ensures precise timing adjustments, crucial for optimal engine performance and longevity. A key feature of the OTC 6691 is its oversized design. This intentional sizing prevents the installation of valve covers while the retaining plates are in place, acting as a safeguard to protect the engine from improper assembly. This tool is a direct alternative to the OEM equivalent EN-48383.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

Brand	OTC
Part Number	6691
Category	Engines and Components

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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