Subaru EJ253/255/257 Rear Main Seal Replace During Head Gasket Repair.

Updated: Apr 10

Many times during our Cylinder Head repairs on Subaru Naturally Aspirated EJ253, Or Subaru Turbo EJ255 | EJ257 Engines we find that their is engine oil residue leaking from behind the engine coming from the Rear Main Seal & PCV Baffle Plate. At Sorenson Automotive, Inc | IND. Subaru Mechanics we always take the extra time to address this problem. When we perform our cylinder head gasket repairs we always remove the engine from the vehicle so it makes no sense not to spend the extra hour in making sure this area is sealed. It would really be a huge inconvenience if it were to leak after all this work! Using the correct installation tool we replace the

rear main seal with a Genuine Subaru Rear Main Oil Seal, remove the PCV Baffle Plate, clean the mating surfaces and apply Permatex Ultra Black to finish the repair. It is extreemly important during this step not to use excessive amounts of Silicone and wait the appropriate amount of time for it to cure before installing oil or running the vehicle as "wet" silicone can enter the engine and damage internal components. If you ever are in need of a Rear Main Seal replacment feel free to check us out online at www.sorensonautomotive.com/indsubarumechanicmn


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