Hi folks,
I am doing some readings on ACEA rating requirements. More specific in the section 2. Engine Tests, 2.7 Wear (6). It has limits on Cam wear outlet Cam wear inlet Cylinder wear Tappet wear Piston cleanliness Engine sludge avg. Etc.
For this requirement, the limits are separated into two groups. ACEA ratings of A1/B1 and A3/B3 as one, A3/B4 and A5/B5 is another.
A3/B4 and A5/B5 group has a lower limit allowance for wear.
For example, Cam wear outlet (avg. max. wear 8 cams), 140 microm for A1/B1, A3/B3 and 120 microm for A3/B4, A5/B5.
It seems that A3 spread across two categories of wear limits. As such, does the lower wear limits only applies to the diesel application of B4? In other words, do A3/B3 and A3/B4 actually have the same wear limits in petrol application?
If the answer is no, wouldn’t it be more reasonable to name the rating A3/B4 to A4/B4.....
I am doing some readings on ACEA rating requirements. More specific in the section 2. Engine Tests, 2.7 Wear (6). It has limits on Cam wear outlet Cam wear inlet Cylinder wear Tappet wear Piston cleanliness Engine sludge avg. Etc.
For this requirement, the limits are separated into two groups. ACEA ratings of A1/B1 and A3/B3 as one, A3/B4 and A5/B5 is another.
A3/B4 and A5/B5 group has a lower limit allowance for wear.
For example, Cam wear outlet (avg. max. wear 8 cams), 140 microm for A1/B1, A3/B3 and 120 microm for A3/B4, A5/B5.
It seems that A3 spread across two categories of wear limits. As such, does the lower wear limits only applies to the diesel application of B4? In other words, do A3/B3 and A3/B4 actually have the same wear limits in petrol application?
If the answer is no, wouldn’t it be more reasonable to name the rating A3/B4 to A4/B4.....
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