CCC Updates MOTOR Estimating Guide: What Collision Shops Need to Know About Scans, Aluminum, and Refinish
Estimating platform CCC updated its widely used MOTOR Guide to Estimating in August 2016 with language that reflects the collision repair industry's growing awareness of pre- and post-repair scanning, the complexity of aluminum substrates, welder-specific preparation steps, and refinishing operations that had previously been under-documented. The changes — marked in blue text with chapter stars in the guide — address gaps that industry professionals had been raising for years.
Pre- and Post-Repair Scanning Gets Formal Recognition
The MOTOR guide had already listed scan tool diagnostics and scan tool clear/reset operations as non-included procedures — meaning they require manual addition to any estimate. The August 2016 update went further, expanding the guide's Labor Time Premise introduction to acknowledge the OEM scan mandate more explicitly.
"Many OEMs recommend a pre- and post-repair diagnostic scan on all vehicles involved in a collision that could reveal pre-accident or accident-related damage," CCC wrote in the updated guide. "Please refer to OEM position statement and repair procedures for more information."
This update came against a backdrop of OEM position statements from manufacturers like Honda, Toyota, Nissan, and others that had been pressing the collision repair and insurance industries to incorporate scanning into standard repair workflows. For many shops and estimators, the 2016 wave of OEM position statements felt like a new development — but as P&L Consultants co-owner Larry Montanez has pointed out, European OEMs had been requiring diagnostic scanning for over two decades, and the procedure had been documented in OEM repair manuals and industry training materials going back well before 2016.
Aluminum: Complexity Demands OEM Guidance
The guide's Special Substrate Metals section had previously noted that aluminum is sensitive to heat and corrosion. The updated language takes a more practical and specific approach, emphasizing that aluminum is not a single material and that variability within the category demands individual treatment.
"Variances can be found in alloy, strength, temper, and gauge properties," CCC wrote. "Such variations need to be considered prior to attempting a repair, and an on-the-spot evaluation is required. Aluminum component repair and/or replacement often requires specific equipment and tools. Always consult OEM repair procedures for vehicle-specific information."
This is not boilerplate. Aluminum alloys used in automotive applications span a wide range of properties, and repair techniques appropriate for one alloy can cause structural damage to another. The insistence on OEM-specific guidance reflects the fact that there is no universal aluminum repair protocol — each vehicle line may require different approaches to forming, joining, and protecting the substrate.
Welder Setup Is Not Included
As body-in-white materials have grown more complex — incorporating ultra-high-strength steels, boron steel, and aluminum — welding equipment has evolved in parallel. The MOTOR guide update makes explicit what experienced technicians already knew: welding labor times do not include the equipment setup and preparation steps that precede the actual weld.
"Due to the different types of welding equipment used in the collision repair industry, labor times for welded replaced parts do not include equipment manufacturer procedural steps for welder setup and/or welding tests and preparation," CCC wrote. "Each welding machine manufacturer may have its own unique configurations and setup processes. Additionally, there may be vehicle-specific variables that may increase or decrease the amount of welding machine set-up time and pre-weld preparation."
The guide recommends an on-the-spot evaluation for appropriate setup and preparation time — which means manual line items on the estimate, not reliance on base welding times.
Unprimed Bumper Prep and the Feather/Prime/Block Clarification
Two refinishing-related additions address common points of dispute between shops and insurers.
On unprimed bumper prep: CCC committed to adding a bumper preparation operation to its software whenever OEM specifications confirm the component is unprimed. However, the guide also acknowledged that this information isn't always published by the OEM at the time of vehicle release — which means technicians may still need to add the preparation step manually even when a published operation doesn't yet exist in the software.
"An operation for the preparation of unprimed bumpers will be provided whenever such manufacturing information has been made available by the OEM," CCC wrote. "However, this information may not be available at the time of publication, and preparation for unprimed bumpers may still be required, even though a published operation is not present."
On feather, prime and block: The updated guide removed any ambiguity about the nature of this operation. Prime and block is a refinishing procedure. While the guide had implied this previously, the updated language makes it conclusive. The practical implication — which body labor-rate disputes had previously obscured — is that paint-certified technicians should be performing priming operations, not body technicians, unless the body technician holds EPA Rule 6H certification. Shops assigning the work incorrectly may be creating compliance exposure in addition to billing it at the wrong labor rate.