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AERA Weekly Technical Bulletins – October 1, 2020



Mechanical Lifter Caution on 2001-2016 Nissan/Infiniti 3.5L Engines


The AERA Technical Committee offers the following information on a mechanical lifter caution for 2001-2016 Nissan/Infiniti 3.5L engines. This caution should be observed anytime the cylinder heads are being disassembled for repair. This engine uses unique mechanical lifters for its twelve intake and exhaust locations.


It is important to be careful and note locations of each while disassembling the cams and valves in these heads. When placed on a bench, it’s noticeable that the exhaust lifters are slightly taller than the intakes and have an N preceding their number. The exhaust lifters use Part #132317S(806) while the intakes are available with Part #132312Y(806) and have a U after their thickness number as shown in the photo below.




Revised Valve Spring On 1999-2017 Caterpillar C15 Diesel Engines


The AERA Technical Committee offers the following information regarding a revised valve spring for 1999-2017 Caterpillar C15 diesel engines. This information should be considered anytime cylinder head work is being performed.


A new, improved spring is now used in production to extend the service life of the outer valve spring. The new spring Part #247-9908 is a direct replacement for the previous 211-3123 spring. If a former spring is replaced with the new spring, Caterpillar recommends replacing all of the former springs on the cylinder head with the new outer valve spring.




Four Ways to Lower Your Rate when

Processing Credit Cards




What is the Best Rate?

While there are many things that separate one credit card processor from another, pricing is a huge factor that has an immediate impact on you, the merchant. However, with over 1200 separate interchange rates, the age-old question of “What rate do you offer?” requires a

much more detailed response. Several factors affect the actual cost of accepting payment with a credit card – industry, customer card type, processing method, settlement time, etc. Many variables impact what your customer’s card actually costs you. So, how do you lower your rate when processing credit cards?




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