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SKU:
NLT1H01038
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GM Atlas Engine Camshaft Holding Tool J-44221
$33.99
In Stock
$33.99
Sale price
$33.99
Regular price
This new aftermarket camshaft holding tool cross-references J-44221 for compatible GM Atlas inline 4-, 5-, and 6-cylinder engines.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Chevrolet TrailBlazer 4.2L inline-6 (2002 and related Atlas applications)
- GMC Envoy 4.2L inline-6
- Oldsmobile Bravada 4.2L inline-6
- Buick Rainier 4.2L inline-6
- Chevrolet Colorado / GMC Canyon 2.8L and 2.9L inline-4
- Chevrolet Colorado / GMC Canyon 3.5L and 3.7L inline-5
- Other GM Atlas 4.2L inline-6 applications using J-44221
Product Overview
Timing-chain, cylinder-head, or cam service on an Atlas engine requires the camshafts to stay in a known position while fasteners and timing components are handled. This holder locks against the designed cam locations so valve timing is not left to paint marks and guesswork.
It is a holding tool, not a complete timing kit. Crankshaft locks, chain tensioner tools, timing references, or additional fixtures may be required for the exact procedure.
Identify the engine displacement and service procedure. The J-44221 reference appears across 2.8L, 2.9L, 3.5L, 3.7L, and 4.2L Atlas applications, but access and companion tools vary.
Key Features & Performance
- Holds compatible camshafts during timing work
- Application-shaped service fixture for GM Atlas engines
- Supports accurate chain and head procedures
- Reusable alternative to improvised cam locking
Replaces Part Numbers
- J-44221
- J44221
Common Uses
- Holding cams during timing-chain replacement
- Maintaining position during cylinder-head service
- Supporting camshaft or phaser fastener work
Technical Specifications
- Product Type: Camshaft holding fixture
- Engine Family: GM Atlas inline 4 / 5 / 6
- Displacements: 2.8L, 2.9L, 3.5L, 3.7L, 4.2L where specified
- Condition: New aftermarket tool
Installation & Fitment
- Read the exact engine timing procedure
- Set crankshaft and cam timing marks before fitting the holder
- Never rotate the engine against a locked tool
- Use all companion fixtures required by the manual
- Hand-turn the engine and recheck timing before startup
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Does this time the engine by itself? A: No. It only holds designated camshaft positions; timing marks and other tools still apply.
Q: Is it only for the 4.2L inline-six? A: No. J-44221 is also referenced for several GM Atlas inline-four and inline-five engines.
Q: Can I use it to break loose any cam bolt? A: Only where the service procedure allows; never overload a holding fixture.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: J-44221 camshaft holding tool, GM Atlas timing chain holder, TrailBlazer 4.2 cam tool, Colorado Canyon inline engine timing tool, J44221 cam retainer
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.