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Start ShoppingHot Cams 5PK948125 Shim Package Refills - High-Performance Engine Adjustment Kit
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Description
Upgrade your engine's performance with Hot Cams' precision-engineered shim package refills. These essential components ensure perfect alignment and optimal functionality for high-performance engines.
Key Features
- High-Precision Engineering: Manufactured to exact tolerances for seamless engine component integration.
- Durable Material Construction: Made from heat-resistant alloys to withstand extreme operating conditions.
- Easy Installation: Designed for quick, tool-free replacement without compromising performance.
- Universal Compatibility: Fits most Hot Cams engine models for hassle-free use across multiple applications.
Why Choose This Product
Whether you're tuning a racing engine or optimizing a street machine, these shim refills deliver reliable performance and long-term durability. Their precision fit reduces wear and enhances engine efficiency, while the corrosion-resistant materials ensure consistent operation in all weather conditions. Perfect for mechanics and riders seeking maximum performance without compromising engine integrity.
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Upgrade your engine's performance with Hot Cams' precision-engineered shim package refills. These essential components ensure perfect alignment and optimal functionality for high-performance engines.
Key Features
- High-Precision Engineering: Manufactured to exact tolerances for seamless engine component integration.
- Durable Material Construction: Made from heat-resistant alloys to withstand extreme operating conditions.
- Easy Installation: Designed for quick, tool-free replacement without compromising performance.
- Universal Compatibility: Fits most Hot Cams engine models for hassle-free use across multiple applications.
Why Choose This Product
Whether you're tuning a racing engine or optimizing a street machine, these shim refills deliver reliable performance and long-term durability. Their precision fit reduces wear and enhances engine efficiency, while the corrosion-resistant materials ensure consistent operation in all weather conditions. Perfect for mechanics and riders seeking maximum performance without compromising engine integrity.
| SKU | GMEA3706D1 |
|---|---|
| MPN | 5PK948125 |
| Brand | Hot Cams |
| Category | Engine |
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Frequently Asked Questions
It is a refill pack of 5 valve shims, each 7.48 mm in diameter and 1.25 mm thick, intended to replenish a Hot Cams 7.48 mm valve shim kit for shim-under-bucket engines.
No. Part number 5PK948125 is a single-size pack: all 5 shims are 7.48 mm diameter and 1.25 mm thick.
Check your OEM service manual or the original shim diameter used in your engine. If your engine uses 7.48 mm diameter, shim-under-bucket style shims, these refills can be used. If the OEM uses 9.48 mm, 8.90 mm, 10 mm, or another size, this pack will not fit.
Yes, as long as your engine uses 7.48 mm diameter shims and you correctly calculate and verify the required 1.25 mm thickness. Many users buy refills once they know the exact size they need to dial in clearances.
You don’t need a unique Hot Cams tool, but you do need standard valve-adjustment tools: feeler gauges, basic hand tools, a torque wrench, and ideally a micrometer to verify shim thickness. Some engines may require a valve shim tool to depress buckets without removing camshafts, as specified in the service manual.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 0 min
Tools Required
- Service manual for your specific vehicle
- Metric socket set
- Torque wrench
- Feeler gauge set
- Magnetic pickup tool or small magnet
- Pick or small screwdriver (for bucket removal where applicable)
- Micrometer or caliper (to verify shim thickness)
- Clean shop towels
Pro Tips
- Work on a cold, clean engine and follow the exact procedure from the OEM service manual.
- Use a notepad or spreadsheet to track valve positions, current clearances, shim sizes, and target clearances.
- Lay cam caps and hardware out on a clean surface in the exact order and orientation you removed them.
- Verify shim thickness with a micrometer—don’t rely only on the marking if it’s worn or hard to read.
- Rotate the engine several times by hand after reassembly and re-check clearances before starting.
- Blow debris away from the valve cover area before opening the engine to prevent contamination.
Common Mistakes to Avoid
- Mixing up cam caps or camshaft positions during removal/reinstallation
- Not recording original shim sizes and locations before changing them
- Incorrect valve-clearance calculations leading to wrong shim selection
- Dropping shims into the engine and not retrieving them
- Skipping torque specs and tightening cam caps unevenly
- Measuring valve clearance on a warm engine instead of stone cold (when required by the manual)
Comparison vs Stock/OEM
Functionally equivalent to OEM shim-under-bucket valve shims when the correct diameter and thickness are selected.
Improvements
- Lower cost per shim compared to most OEM shims.
- Convenient bulk replenishment for commonly used sizes.
- Integrated into the Hot Cams shim system so sizes and markings match their popular kits.
Considerations
- You must verify that your engine uses 7.48 mm shims; many OEM applications use different diameters.
- Always confirm thickness and final valve-clearance results against OEM specifications.
Durability & Warranty
Expected Lifespan
Comparable to OEM valve shims; typically last for many service intervals unless there is an underlying valve-train issue.
Warranty
Standard Hot Cams / distributor parts warranty (defects in materials and workmanship).
Maintenance
No direct maintenance; inspect during scheduled valve-clearance checks and replace only when a different thickness is needed or if a shim shows abnormal wear or damage.
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