Cody Casey
RTV (Room Temperature Vulcanizing) silicone gasket makers are used to seal transmission pans. However, there is no definitive answer to whether one should use RTV or gaskets for transmission pans. While some people prefer using RTV, others prefer gaskets, and some use both. RTV is oil-resistant and is designed to not break down. However, it is advised to not use RTV on both sides of the gasket as it can get into the valve bodies and cause issues. Gaskets are preferred by some as they can be reused and are easier to clean.
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What You'll Learn
RTV is a gasket sealant
RTV stands for "room temperature vulcanizing". It is a gasket sealant that can be used for transmission pans, although it is not widely adopted for this purpose. RTV is a type of silicone adhesive that cures and hardens when exposed to air, creating a gasket-like seal between two surfaces. It is important to note that RTV should not be used as a replacement for a gasket but rather as a supplement to enhance the seal.
When using RTV on a transmission pan, it is recommended to apply it only to the corners of the gasket and/or stepped casting areas with gaps. This is because uncured RTV can act as a lubricant, causing the gasket to slip out of place. Additionally, using too much RTV can cause issues if pieces break off and fall into the transmission pan. It is also important to follow the manufacturer's instructions for cure and installation times, as these can vary.
Some people have reported success using RTV on their transmission pans, while others have experienced leaks even after following the recommended procedures. It is worth noting that some vehicle manufacturers, such as Dodge and Chrysler, use RTV on their transmission pans from the factory.
RTV has a wide range of applications beyond transmission pans. It is commonly used as a building sealer, especially in bathrooms and kitchens, and in various art and industrial applications due to its ability to reproduce fine details. It is also suitable for electrical insulation and high-temperature equipment sealing.
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RTV is oil-resistant
RTV, or room-temperature vulcanizing, is a type of liquid silicone sealant that forms a flexible rubber when cured at room temperature. It is commonly used in the automotive industry as a gasket material for OEM assembly. RTV is available in different colours, each with unique properties and applications.
One of the most popular RTV products is the Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker. It is designed for high-flex and oil-resistant applications, offering excellent torque retention and high-temperature resistance. It is also sensor-safe, low-odour, and non-corrosive, making it ideal for use in automotive projects.
Another option is the Permatex 82194 Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, which is also sensor-safe, non-corrosive, and offers high torque and vibration resistance. This product is suitable for engines that operate at higher RPM and have tighter tolerances.
While RTV is oil-resistant, it is important to choose the correct type for your specific application. For example, the Black Silicone Adhesive Sealant is not recommended for engine applications as it is not oil-resistant. Additionally, when using RTV, it is crucial to follow the manufacturer's instructions and allow adequate curing time to ensure optimal performance.
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RTV can be used on some cars
RTV, or room-temperature vulcanizing rubber, is a type of sealant that can be used on some cars' transmission pans to prevent leaks. While some car manufacturers use RTV from the factory, it is not a widely adopted method for sealing transmission pans and is considered an exception rather than the rule.
Some car models that use RTV from the factory include Jeep JK, Chrysler Minivan, Dodge, and Subaru. However, it is important to note that not all car models use RTV, and attempting to use RTV on a car that does not specify its use can lead to issues. It is always recommended to refer to the car's manual or seek advice from a professional mechanic before attempting any repairs or modifications.
When using RTV on a transmission pan, it is important to follow the manufacturer's instructions carefully. This includes allowing the RTV to cure for the specified amount of time, which can range from 10 minutes to overnight, depending on the manufacturer. It is also crucial to use the correct type of RTV that is compatible with the transmission fluid, as the friction modifiers in the fluid can attack RTV.
In addition to RTV, gaskets are another commonly used method for sealing transmission pans. Gaskets are available in various materials, including rubber, cork, nylon over steel with a molded silicone sealing bead, and steel core. Some people prefer to use a combination of RTV and a gasket to ensure a secure seal and prevent leaks. However, it is important to note that over-tightening the pan bolts when using a gasket can cause them to snap easily.
While RTV can be effective in sealing transmission pans and preventing leaks, it is not without its drawbacks. One issue with RTV is that it can be difficult to remove and may require a scraper or screwdriver to break through the sealant. Additionally, if RTV is not applied correctly, it can squeeze out and cause clogs in the fluid passages, leading to potential issues. Therefore, it is important to carefully follow instructions and take the necessary precautions when using RTV on a transmission pan.
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RTV can cause clogging
RTV, or room-temperature vulcanizing rubber, is a type of sealant that can be used in various automotive applications, including transmission pans. While RTV can be effective in sealing transmission pans and preventing leaks, there are some potential issues to be aware of, including the possibility of clogging.
One of the main concerns with using RTV on transmission pans is the potential for clogging the oil pickup tube filter. This issue has been reported in some Toyota and Subaru vehicles, where excess RTV material from the oil pan cover clogged the oil sump filter in the pickup tube, potentially causing oil starvation for the engine. In these cases, it may be necessary to remove the oil pan and manually unclog the pickup tube, which can be a time-consuming and costly process.
Another potential issue with using RTV on transmission pans is that it can be difficult to remove if it is not applied correctly. If RTV is not fully cured before returning the vehicle to service, it can compromise the integrity of the seal and lead to leaks. Additionally, if RTV is used on both sides of a gasket, it can be challenging to remove the gasket during future service work, and residual RTV can get into the transmission and cause issues.
To avoid these issues, it is important to follow the manufacturer's instructions when using RTV on a transmission pan. This includes allowing the RTV to cure for the recommended amount of time, typically a minimum of two hours for setup and 24 hours for a full cure. It is also important to use the correct type of RTV for the specific application, as some types are designed specifically for use with transmission fluid, and using the wrong type can lead to breakdown and clogging.
Furthermore, it is generally recommended to avoid using RTV on both sides of a gasket, as this can make removal difficult and increase the risk of clogging. Instead, it is usually recommended to use a gasket sealant or a rubberized composition gasket, which can provide a better seal and reduce the risk of leaks. By following these guidelines and being cautious when using RTV on transmission pans, many of the potential issues associated with this practice can be avoided.
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Gaskets are an alternative to RTV
RTV is a type of sealant that can be used on transmission pans to prevent leaks. However, it is not always the best option, as it can be difficult to remove and can cause leaks if not applied correctly. Gaskets are an alternative to RTV when sealing transmission pans. Gaskets are a type of mechanical seal that is placed between two surfaces to create a tight seal and prevent leaks.
There are several types of gaskets available, including rubber, silicone, and steel core gaskets. Some gaskets are designed to be reused, while others are meant for one-time use. Reusable gaskets typically have a longer lifespan and can be removed and reinstalled multiple times without losing their sealing properties.
When choosing between RTV and gaskets, it is important to consider the design of the transmission pan and the type of gasket being used. Some transmission pans have grooves or retention mechanisms specifically for RTV, while others are designed to use gaskets without any additional sealant. It is also important to follow the manufacturer's instructions and recommendations for the specific type of transmission pan and sealant or gasket being used.
In some cases, a combination of RTV and gaskets may be used. For example, a bead of RTV may be applied to the pan, followed by the placement of a rubber gasket, and then another bead of RTV on top of the gasket. This creates a strong seal and can help prevent leaks. However, it is important to be careful not to use too much RTV, as it can cause issues if it breaks off and gets into the transmission.
Ultimately, the decision between using RTV or gaskets on a transmission pan depends on various factors, including the design of the pan, the availability of the correct type of RTV or gasket, and personal preference. Gaskets can be a good alternative to RTV as they can provide a strong seal and prevent leaks, especially when used correctly and in accordance with the manufacturer's instructions.
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Frequently asked questions
Yes, you can use RTV on your transmission pan. RTV is oil-resistant and is designed to not break down. However, it is not widely adopted for sealing transmission pans and is considered an exception rather than the norm.
RTV is used as a gasket material for OEM assembly out of the factory. It is also used to prevent leaks caused by vibration and thermal expansion.
Using RTV on a transmission pan can be messy and time-consuming. It can also be difficult to remove and may require a new pan if it cannot be straightened. Additionally, it is important to use the correct type of RTV for trans fluid as only certain types are compatible.
The process of applying RTV to a transmission pan may vary depending on the specific RTV product and vehicle. However, a general process includes cleaning the transmission mating surface and pan mating surface, applying an even bead of RTV to the pan, placing a gasket on top of the bead, inserting bolts, and allowing the RTV to cure before refilling with ATF.
