Oil Pan Rtv Application Guide For Rodeo Vehicles

RTV, or room-temperature vulcanizing rubber, is a type of sealant used in automobiles to create a tight seal between two surfaces. In the context of an oil pan, RTV is applied to prevent leaks and ensure a secure fit. The amount of RTV required for an oil pan can vary depending on the vehicle's specific design and the type of gasket used. While some gaskets are designed to be installed dry, others may require a small amount of RTV in certain spots or along the entire surface. It is important to follow the manufacturer's recommendations and torque specifications to achieve a proper seal and avoid over-compression or leakage.

RTV alternatives

When it comes to RTV alternatives, there are a few options that can be considered for use on an oil pan. RTV, or room-temperature vulcanizing, silicones are known for their extreme durability and are often used as sealants. However, their strong vinegar smell can be off-putting, and in some cases, it may be preferable to use a different product.

One alternative to RTV is a product called Shin-Etsu KE-3497. This is a high-strength silicone developed for coating and sealant applications in the aerospace and electronics industries. It offers a fast-curing alternative to other electronic-grade silicone coatings. Shin-Etsu KE-3497 is a suitable replacement for Dow DOWSIL™ 3140 RTV, a commonly used RTV silicone.

Another option mentioned in online forums is 3M weatherstrip adhesive, also known as "gorilla snot". This product can be used to keep gaskets in place during oil pan replacements. A small amount of regular silicone can also be used for this purpose.

When choosing an alternative to RTV, it is important to consider the specific application and surface being worked on. Proper surface preparation, such as cleaning and degreasing, is crucial for achieving a good seal, regardless of the product used. Additionally, it is recommended to follow the manufacturer's instructions for curing and torquing times to ensure optimal results.

While RTV is a popular choice for its durability and convenience, alternatives like Shin-Etsu KE-3497, 3M weatherstrip adhesive, or regular silicone can also be effective, depending on the specific requirements of the project.

Application methods

When applying RTV to an oil pan, it is important to follow the manufacturer's recommendations and best practices to ensure a proper seal and avoid leaks. Here are some detailed instructions and tips for applying RTV:

Surface Preparation:

Before applying RTV, it is crucial to prepare the surfaces of both the oil pan and the engine block. Clean and degrease the mating surfaces to ensure they are free from any residue, oil, or dirt. This can be done using brake cleaner or a similar solvent. Wipe the surfaces with a clean cloth dampened with brake cleaner and then flush them again with brake cleaner to ensure they are thoroughly cleaned.

Amount and Placement of RTV:

The amount of RTV to be used can vary depending on the specific application and the size of the oil pan. Generally, a thin layer of RTV is recommended. Apply a small bead of RTV to the corners or stepped areas of the oil pan and/or the engine block. You can use your finger or a caulking gun to apply a thin, even layer. Some people also apply a thin coat of RTV to both surfaces and let it dry before assembling to ensure 100% contact and a better bond.

It is important not to overuse RTV. It should only be applied to areas that need it, such as corners, stepped joints, and gaps. Do not apply RTV to the entire gasket. Consult the repair manual or the manufacturer's recommendations for specific instructions on where and how much RTV to apply. Remember that a little RTV goes a long way.

Timing and Torque:

The timing of the RTV application and the torque specifications are crucial for a successful seal. The assembly should be installed within a few minutes of applying the RTV, as uncured RTV can act as a lubricant and cause the gasket to slip out of place. Once the oil pan is installed, torque the bolts to the specified value. After torquing, allow the RTV to set and dry completely before adding oil or starting the engine. The curing time can vary depending on the type of RTV used, but it is generally recommended to wait at least a few hours or even overnight for the best results.

RTV Type and Colour:

There are different types and colours of RTV available, and the choice depends on personal preference and the specific application. High-temp RTV is often recommended for oil pans to be on the safe side. Black, grey, and ultra-black RTV are commonly used and are known to work well. Red RTV is generally not recommended as it can give off silica during the curing process, which can contaminate the oil and damage bearings and sensors.

Gaskets:

Some people prefer to use a gasket with RTV to ensure a better seal. If using a gasket, apply a small amount of RTV to the gasket to make it sticky, then place it onto the oil pan. You can also apply a bead of RTV on top of the gasket before installing the pan. However, it is important to note that some gaskets are designed to be installed dry, and overuse of RTV can prevent the gasket from forming a reliable seal. Always refer to the manufacturer's recommendations and the repair manual for specific instructions.

Amount needed

The amount of RTV needed for an oil pan varies depending on the make and model of the car, the type of RTV used, and the method of application.

For a 94 Honda Civic, one source recommends applying a thin amount of RTV around the oil pan and the bottom of the block. However, another source suggests that if both surfaces are clean, no RTV is necessary, and a small amount of silicone or 3M weatherstrip adhesive can be used to keep the gasket in place.

For a Toyota Camry, one source recommends using one tube of RTV, which is sufficient for the job. Another source suggests smearing a small amount of black or red high-temp RTV onto the cork gasket, just enough to make it sticky before placing it onto the pan.

For a Subaru Outback, one source recommends using a thin layer of RTV, rubbed on with a finger, to seal a properly prepared surface. Another source suggests applying a bead of RTV around the bolt holes, circling the holes to help prevent leaks at those points.

It is important to note that the overuse of RTV can prevent the gasket's ability to form a reliable seal, causing leaks. RTV should only be used as a supplemental sealer in specific locations, such as corners or stepped casting areas with gaps. A small amount of RTV will fill in these areas to ensure a leak-free assembly.

When using RTV, it is recommended to follow the manufacturer's instructions for proper application and curing time.

Application timing

Once the surfaces are prepared, you can begin applying the RTV. It is recommended to use a high-temp RTV, such as Permatex Ultra Grey, Black, or Copper. Apply a thin bead of RTV to the oil pan, ensuring that it is nice and even, especially around the bolt holes. You can also apply a small amount of RTV to the gasket itself to make it sticky and help it stay in place.

After applying the RTV, it is important to act quickly. The assembly should be installed within five minutes of RTV application. Finger-tighten the bolts just barely snug and then wait for the RTV to cure. The curing time can vary depending on the product used, but it is typically around 20 minutes to an hour. Once the RTV has cured, you can then finish torquing the bolts to spec.

It is recommended to let the RTV set up and dry completely before adding oil. Again, the drying time can vary, but it is typically recommended to wait for at least 12 or 24 hours before adding fluids. This will ensure that the RTV has fully cured and will provide a lasting seal.

RTV types

RTV, or Room Temperature Vulcanizing, is a type of silicone rubber used to seal parts together in automotive applications. It cures at room temperature when exposed to moisture in the air and typically sets up in one hour, with a full cure within 24 hours.

There are several types of RTV silicone, each specified by colour, including black, red, blue, grey, and clear. Each type has its own characteristics, making it better suited for certain applications than others.

Black RTV is the most common type used in OEM assemblies. It is a general-purpose sealant used for sealing metal, rubber, and glass. It can withstand temperatures up to 450 degrees Fahrenheit continuously, with temporary resistance up to 500 degrees. "Ultimate" black RTV has higher resistance to oil and is constantly exposed to hot oil without degradation, making it ideal for oil pans and timing covers.

Grey RTV is used for high-torque applications, such as intake manifolds, and close-spaced bolt profiles. It has more flexibility when cured than general-purpose RTV and is more oil-resistant. It is also the recommended silicone for all import vehicles.

Red RTV is used for high-heat applications, such as exhaust manifolds and drive housings. It can withstand temperatures up to 650 degrees Fahrenheit. "Ultimate" red RTV is sensor-safe and can be used on O2 sensors.

Blue RTV is a general-purpose sealant that can be used for sealing valve covers, oil pans, timing covers, water pumps, and thermostat housings. It is not designed for high-temperature applications and should not be used with gear oil.

Clear RTV is used for sealing windshields, gluing windows to tracks, and lens housings. It is also suitable for household applications such as aquariums and tub/shower installations.

Other types of RTV include "The Right Stuff" by Permatex, which is available in black and grey and has a quick setup time of one minute, and "Optimum" RTV, which is an improved version of the standard RTV and can withstand higher temperatures.

Frequently asked questions