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The patented BimmerFix coolant pipe repair system for use with BMW N62 V8 engines and Rolls-Royce N73 V12 engines.

The problem with the original BMW N62 V8 Coolant Pipe and the after-market collapsible pipe repair is that they can eventually leak from the same BMW N62 V8 “weep hole” again in the future. These vehicles include the Alpina, BMW 745i, 750i, 645Ci, 650i, 545i, 550i, X5 SUVs Morgan Aero, Rolls-Royce, and Wisemann GT!


The patented BimmerFix Coolant Pipe Repair System is designed for BMW N62 V8 Coolant Pipe Repair. This BMW N62 V8 Weep Hole Leak Repair is easier to install because only your water pump needs to be removed. BimmerFix offers a more durable method of repairing a leaking front seal on your 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 aluminium alloy similar to the BMW N62 V8 & Rolls-Royce N73 V12 engines. 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 labour to install the BimmerFix Stent is approximately one hour more shop time than is required to replace your BMW’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 popular Alpina®, BMW's® made from 2001 to 2010, in such fabulous vehicles as the 735i & 735Li (E65 & E66) 740i & 740Li (E65 & E66), 745i & 745Li (E65 & E66), 750i & 750Li (E65 & E66), 645Ci & 650i (E63 & E64), 540i (E60 & E60), 540i 545i & 550i (E60 & E61), and the X5 (E53 & E70) SUV, Morgan Areo®, Rolls-Royce®, and Weisemann GT®.


When BMW® originally built the BMW N62 V8 and Rolls-Royce N73 V12 engines the coolant transfer pipe (part # 11 14 1 439 975) 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 BMW ® Coolant Transfer Pipe through the front of the engine.

This 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 BMW N62 V8 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 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 BMW N62 V8 and Rolls-Royce N73 V12 engines. 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 labour 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 that could help to prevent future failure of the front seal of the coolant transfer pipe.