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AERA Technical Bulletins – April 20, 2022

Aluminum Gallery Plug Caution on 2005-2017 Caterpillar C6.6 Diesel Engines

The AERA Technical Committee offers the following information regarding an aluminum gallery plug caution on 2005-2017 Caterpillar C6.6 diesel engines. These engines use small Avseals® plugs to seal certain fuel and oil galleries. These plugs contain aluminum and depending on your cleaning chemicals, may degrade and leak if not removed before cleaning
These two-piece (steel mandrel and aluminum sleeve) plugs resemble a rivet before installation. To install, the plug is placed onto a rivet gun and into the hole. Upon pulling the trigger on the gun, the sleeve is compressed and expands to form the seal. The pintail breaks away and leaves the plug even with the assembly’s surface and sealed tightly.

Oil Regulator Valve on 2009-2017 Jaguar/Landrover 5.0L Engines

The AERA Technical Committee offers the following information regarding an oil regulator valve for 2009-2017 Jaguar/Landrover 5.0L engines. This is a V8 engine, and each cylinder head has an oil regulator valve located in the front near the timing chain opening as shown in the photo below.
The valve is available from the dealerships using Part #6A809 and it acts as an anti-drain-back valve to keep oil up in the oil galleries. The valve is a light press fit and should be located below the deck of the head when properly installed. It has been reported however the valve may have moved slightly during engine operation as some have noted it has protruded beyond the head deck. To properly clean the cylinder head the oil regulator valve should be removed before cleaning and replaced with new if damaged during removal.

Camshaft Needle Roller Bearings

By Mike Mavrigian
While traditional steel-backed babbit cam bearings perform well in most builds, when “radical” camshaft profiles, accompanied by extremely high valve spring pressures are featured, excess pressure is exerted against the camshaft lobes, which in turn pushes the cam journals against the bearings, leading to potential accelerated bearing wear, resulting in potentially decreased oil pressure. Also, while a “traditional” oiling system routes oil from the pump to the cam bearings, then to the main bearings and then to the rod bearings, in a competition block that features priority main oiling, the reverse occurs, with oil first being routed to the mains, and finally to the
cam bearings. With the use of high valve spring pressures, this potentially can result in decreased, or delayed lubrication to the cam bearings.
In order to address the needs of an extreme-performance engine, a viable alternative is the use of needle roller cam bearings, which provide increased stability and durability for extended high-RPM racing applications.

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Podcast Episode 16
API Engine Oils

Chuck Lynch and Dave Hagen interview Jeff Harmening from the American Petroleum Institute (API). Jeff explains licensing of engine oils, proper storage and handling, engine oil specifications, diesel engine oils, and what should engine builders expect with new engine oils. Steve and Chuck also discuss the Ford Flathead V8 engine during the history segment of the podcast. They also let you know about the upcoming AERA Regional Tech & Skills Conferences.

AERA Tech & Skills Conferences

Everyone in business owes it to themselves and their business to gain knowledge and network with other people within the same industry. AERA understands that traveling to national trade shows to gain knowledge and networking opportunities is very expensive. Therefore, AERA has decided to help by teaming up with a regional host and offer these opportunities to different regions of our country and hopefully closer to your shop. All shops welcome! Need not be an AERA member to attend.

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