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Regarding The Cadillac Northstar

RxAuto [Thermagasket] has been working on methods to repair the Cadillac Northstar engine since its introduction in the mid 90's. Our in-house support technicians have helped hundreds of satisfied Cadillac customers successfully repair faulty Northstar cooling systems and head gaskets. Not to mention the hundreds of  hands on repairs in the field.  You will not find more knowledge of the Northstar head gasket and cooling system problems anywhere!

• We are very proud of our customers' 85%  Northstar success rate.
• We will continue to help our valued customers repair Northstar engine

CAUTION: Do not be fooled by any product claiming exceptional results with a "Special Northstar Product". However, Thermagasket has been successful in repairing many Northstar engines. Thermagasket not only offers the best chance of repairing your vehicle, but also gives you access to the most effective technical support available!

Important Notice:

The cooling fans on the Northstar come on between 210 and 218 degrees which is way too late, especially if you have compromised the head gaskets and head bolts by overheating the system. It is advised to install one of our adjustable fan switches so that you can adjust the temperature that the fans come on to 180-190 degrees for the overall well being of your engine.

The Northstar kits below have various options:

The Flush Kit helps eliminate air during the flushing process as well as cutting the flushing time in half!

The Stant pressure release cap allows you to easily release the pressure build up in the fill tank during the treatment process!

Due to the extensive time spent with technical support to completely diagnose and repair the Cadillac Northstar engines we can no longer offer a Warranty on the Northstar Kits. We will continue to offer the most knowledgeable comprehensive Northstar support available to assist you in the successful repair of your vehicle!