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ROLLS Royce N73 V12

The Problem:

The Front Seal on the Rolls-Royce Phantom N73 V12, or any Rolls Royce with the N73 V12 engine, Coolant Transfer Pipe can fail in as little as 40,000 miles. The repair on this internal engine seal requires many hours of labor and can cost thousands of dollars. Coolant is now leaking from a "weep hole" in the engine of your Rolls-Royce, and we are here to help. The Rolls-Royce weep hole is located next to the water pump.

The Solution:

The BimmerFix Stent stops the leaking seals.

The BimmerFix Stent stops the leak in your engine by creating a metal inner lining inside the front seal of the Coolant Transfer Pipe. The BimmerFix Stent is easy to install by removing the water pump and installing the stent into the timing chain cover. There is no need to remove your Rolls-Royce N73 V12 valley pan or intake manifold. You do not need to install a "collapsible pipe."

BimmerFix Beats The Competition

The problem with the original coolant transfer pipe and the after-market collapsible pipe repair is that they can eventually leak from the same “weep hole” again in the future. The BimmerFix Stent is easier to install because only your Rolls-Royce’s water pump needs to be removed, and BimmerFix offers a more durable method of repairing a leaking front seal on a Coolant Transfer Pipe at a lower cost. The seal created by the BimmerFix Stent is more durable because it is made of a high-strength aluminum alloy similar to the Rolls-Royce engine. The BimmerFix Stent provides a metal liner and bonds to the coolant transfer and timing chain cover using the special high-temp BimmerFix Coolant Pipe Silicon Sealant. This BimmerFix Sealant can be continuously immersed in antifreeze and can withstand temperatures up to 500 degrees Celsius. The labor to install the BimmerFix Stent is approximately one hour more shop time than is required to replace your Roll-Royce’s water pump. We recommend that a new water pump be installed when installing the BimmerFix Stent, or that a BimmerFix Stent is installed in a vehicle when the water pump is being replaced, and this is an inexpensive measure that could help to prevent future failure of the front seal of the coolant transfer pipe. The BimmerFix Coolant Pipe Repair System is designed to repair the coolant transfer pipe leak on the Rolls-Royce N73 V12 engine. 

The Rolls-Royce Phantom with N73 V12 engines from 2003 to 2016
(All model Rolls Royce with N73 V12 engines)

When Rolls-Royce originally built the N73 engine the coolant transfer pipe was installed through the front of the engine block before the installation of the timing chain cover. Once the engine is installed in the vehicle it is very expensive to remove the timing chain cover in order to install a new factory made Rolls-Royce Coolant Transfer Pipe through the front of the engine.

This Rolls-Royce Coolant Transfer Pipe is also sometimes called the Crossover Pipe, Water
Transfer Pipe, or Water Transfer Tube.

A second method was later developed, which involves accessing the coolant transfer pipe by removing the intake manifold and valley pan. Once the intake manifold and valley pan have been removed, then the old coolant transfer pipe can be cut-out of the inside of the engine block, and a new collapsible coolant transfer pipe (also called an expandable coolant transfer pipe) is installed.

Several companies manufacture these collapsible coolant transfer pipes. The collapsible pipe is the most commonly used method of repairing a leaking coolant transfer pipe because it is cheaper and faster to remove the intake manifold and valley pan than the original factory method of removing the timing chain cover. The problem with both of these methods is that the front seal on both the factory installed coolant transfer pipe and the after-market “Collapsible Transfer Pipe” could eventually leak at the same place again in the future.

The BimmerFix Stent offers a more durable method of repairing a leaking front seal on a coolant transfer pipe at lower cost. The seal created by the BimmerFix Stent is more durable because it is made of high-strength aluminum alloy similar to the Roll-Royce engine. The BimmerFix Stent actually provides a metal liner and bonds to the coolant transfer and timing chain cover using the special high-temp BimmerFix Coolant Pipe Silicon Sealant. This BimmerFix Silicon Sealant is able to be continuously immersed in antifreeze, and can withstand temperatures up to 500 degrees Celsius. The labor to install the BimmerFix Stent is approximately one hour more shop time than is required to replace the water pump. In fact, we recommend that a new water pump be installed when installing the BimmerFix Stent, or that a BimmerFix Stent is installed in a vehicle when the water pump is being replaced. This is an inexpensive measure which could help to prevent future failure of the front seal of the coolant transfer pipe.

Coolant Transfer Pipe Repair Kit

  • BimmerFix Stent
  • 1 tube of BimmerFix Coolant Pipe Sealant
  • 1 bottle of BimmerFix Cooling System Sealer & Conditioner
  • 2 Round Sanding Rods
  • 1 Cleaning Rod
  • 6 Sponge Brushes
  • 2 Pair of Gloves
  • Detailed Instructions and a Case

BimmerFix Cooling System
Sealer & Conditioner

The BimmerFix Cooling System Sealer & Conditioner are not required to stop the “ weep hole” leak from the Front Seal on the N73 Coolant Transfer Pipe.

The BimmerFix Stent repairs the front seal leak. However, the BimmerFix Cooling System Sealer & Conditioner provides additional protection against future leaks and is designed to condition and seal the coolant transfer pipe seal, valley pan gasket seal, as well as the gaskets of the water-cooled alternator and the rear coolant passage cover seal.

The rear coolant passage cover seal is very expensive to replace because it requires the removal of the transmission and the rear exhaust system to access the seal.

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