Understanding The Oil Pan Tray In The 340 Engine

The tray in the oil pan of a 340 engine is called a windage tray. It is designed to reduce windage losses, which are caused by the engine's rotating assembly pushing through the oil in the oil pan. Windage trays are typically made from metal and can be an effective way to improve an engine's performance. They are available in both stock and aftermarket options, with some trays designed specifically for racing applications.

The oil pan's windage tray

In the context of the Chrysler 340 engine, the windage tray is specifically designed to optimize the engine's performance. This tray is often made of steel and features a louvered design, which allows for the rapid return of oil to the sump while also preventing oil splash-back. The louvered design is a key factor in increasing horsepower and enhancing overall engine power.

One of the challenges encountered when installing a windage tray is ensuring proper clearance. In some cases, the windage tray may interfere with the oil pan or other components, requiring adjustments such as trimming or bending certain parts of the tray. It is crucial to achieve the correct clearance to avoid issues with the rotating assembly and oil pan interference.

The installation process for the windage tray involves mounting it on the windage tray kit, which allows for adjustment to accommodate different strokes and rod lengths. The tray is secured using bolts and washers, and it is important to tighten them to the specified torque values. The installation may also require the use of a gasket to ensure a proper seal.

In conclusion, the oil pan's windage tray in the Chrysler 340 engine is a critical component that contributes to the engine's overall performance and longevity. By preventing oil splashing and promoting efficient oil circulation, the windage tray helps to increase horsepower and protect the engine. Proper installation and clearance are key factors in ensuring the windage tray functions optimally.

Installing the pan with the tray

To install the pan with the tray, you will need to ensure that the windage tray is not interfering with the pan. If the tray has a curled edge, it may need to be trimmed or modified to fit properly. The tray should be pushed inwards, and the pan should be pushed down over the rails. The bolt holes on the tray will indicate whether it is a 340 or 360 tray; if they are egg-shaped, it is a 340-360 tray, and if they are round, it is either a 340 or 360 tray.

When installing the pan, you may need to use washers between the tray and the main cap to create some space. The gasket should go under the tray, and the four attachment bolts should have washers. The tray will flex when you push the pan on, so you may need to loosen the attaching bolts and get it to clear any obstructions.

If you are using a Milodon windage tray, you will need to use their unique set of installation studs, as the design does not allow the original OE main cap bolts to be used. You may also need to cut the length of the studs to ensure they do not hit the oil pan.

It is important to ensure that the windage tray does not interfere with the movement of the rods and crank. If necessary, you can modify the height of the tray, cut the rolled edges, or bend and fold it to create more clearance.

Milodon windage tray

• Chevy Small Block
• Chevy Big Block
• Ford Small Block
• Ford Big Block
• Mopar Small Block
• Mopar Big Block
• Oldsmobile V8
• Pontiac V8

Milodon also offers windage tray install kits, which are required for properly mounting the tray assembly. The adjustable mounting position allows the tray to work at its maximum potential by being as close as possible to the rotating assembly while avoiding any unnecessary interference with the oil pan.

The Milodon "Diamond Stripper" windage tray is one of the most sophisticated windage trays available on the market today. It features hundreds of small louvers that quickly scavenge oil from crankshaft rotation while preventing splash back, common to screen-type windage trays. This windage tray has been extensively tested and proven to outperform all other screen-type trays.

Oil pan gasket

An oil pan gasket is a crucial component in maintaining the integrity of your engine's lubrication system. The oil pan gasket for the 340 engine, a powerful and iconic V8, is available in both cork and rubber varieties, with some kits offering a combination of both.

The gasket ensures a tight seal between the oil pan and the engine block, preventing oil leaks. Over time, the gasket can degrade, leading to leaks and potential engine damage. Therefore, it is essential to replace the gasket during engine maintenance or when leaks are detected.

When installing a new oil pan gasket, it is crucial to follow the correct procedure to avoid damaging the gasket and ensure a proper seal. The recommended torque value for the oil pan bolts is lower than the factory specification of 15 ft-lbs, as this value is considered too high for cork gaskets and may lead to crushing and breakage. Instead, gently tighten the bolts until you see the gasket spread near the bolt, then move to the next one. Work from the centre bolts outward, and always check the bolt holes on the pan for any squishing or deformation that may have occurred due to previous overtightening.

Some gasket kits come with rubber ends that have "nibs" or "stubs" that fit through holes in the oil pan ends, aiding in alignment and sealing. However, some users have reported success with smooth gasket styles, using silicone to seal. It is recommended to apply a thin film of RTV sealer to the pan side of the cork gasket and let it set for a few minutes before installation. Small dabs of sealer in the corners are also suggested to prevent leaks.

For a more modern approach, a one-piece gasket, such as the SCE AccuSeal Pro Oil Pan Gasket, offers a potential upgrade over the traditional 4-piece style. This gasket is made of nitrile and butadiene and has received positive reviews for its performance.

When it comes to oil pan gaskets for the 340 engine, there are various options available, each with its own advantages and installation techniques. By choosing the right gasket and following the recommended procedures, you can ensure a leak-free assembly and maintain the optimal performance of your engine.

Oil pan depth

The oil pan depth is an important factor to consider when installing an oil pump, as the pickup tube must be the correct length to ensure proper oil pickup and clearance from the bottom of the oil pan. The standard measurement method for oil pan depth is from the bottom of the pan to the sump, or lowest point, of the pan.

The oil pan depth can vary depending on the vehicle's engine and the type of oil pan used. For example, the oil pan depth for a small block Chevy 283 engine with a stock oil pan is approximately 8 inches. Meanwhile, the Milodon Street and Strip Oil Pan for Mopar small block 318/340 engines has an oil pan depth of 7.750 inches.

It is crucial to accurately measure the oil pan depth to ensure the correct oil pump and pickup tube are selected. Minor discrepancies in measurements can lead to significant issues, such as oil pickup tubes that are too long or too short, which can result in inadequate oil pickup or potential damage to the oil pan or other components.

When measuring the oil pan depth, it is recommended to use a modelling clay cone that tapers from the size of a dime to a pencil eraser. This method ensures accurate measurement of the clearance between the oil pump pickup and the bottom of the oil pan.

Additionally, it is worth noting that the oil pan capacity, which includes the volume of oil the pan can hold, is a separate measurement from the oil pan depth. Oil pan capacity is typically measured in quarts, and it is important to fill the oil pan to the recommended level to ensure optimal engine lubrication.

Frequently asked questions