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Part number: 542492
A high quality rear main seal and cork T seal set for a three main bearing 2.25 litre 4 cylinder Series 2 2a 3 petrol or diesel engine; or a 2.6 litre 6 cylinder Series 2a 3 engine.
In our experience, it’s hard to find a rear main seal for these engines that seal properly and reliably. Seals of this type are tricky to install, and incorrect installation is a common cause of leaks after DIY seal replacement. But seal quality (lip profile and diameter) is also a problem.
These particular seals are the only ones we’ve been able to source that work reliably in running engines and in our static bench tests. They’re made by a reputable UK-based seals manufacturer. They’re the seals we use and recommend.
In our bench tests, we install a seal to a crankshaft mounted vertically on a bench. We then flood the inner recess of the seal with engine oil, leave it overnight and see if any oil has leaked past the seal. These seals pass that test repeatedly: no leaks. Other seals we've tested often fail this simple test. The seals we use and recommend are a nice tight fit on the crankshaft; others are a looser fit, by one to two tenths of a millimetre. If the crankshaft sealing surface has been linished, then the looser-fitting seals can go from marginally effective to useless.
Part number: 542492
A high quality rear main seal and cork T seal set for a three main bearing 2.25 litre 4 cylinder Series 2 2a 3 petrol or diesel engine; or a 2.6 litre 6 cylinder Series 2a 3 engine.
In our experience, it’s hard to find a rear main seal for these engines that seal properly and reliably. Seals of this type are tricky to install, and incorrect installation is a common cause of leaks after DIY seal replacement. But seal quality (lip profile and diameter) is also a problem.
These particular seals are the only ones we’ve been able to source that work reliably in running engines and in our static bench tests. They’re made by a reputable UK-based seals manufacturer. They’re the seals we use and recommend.
In our bench tests, we install a seal to a crankshaft mounted vertically on a bench. We then flood the inner recess of the seal with engine oil, leave it overnight and see if any oil has leaked past the seal. These seals pass that test repeatedly: no leaks. Other seals we've tested often fail this simple test. The seals we use and recommend are a nice tight fit on the crankshaft; others are a looser fit, by one to two tenths of a millimetre. If the crankshaft sealing surface has been linished, then the looser-fitting seals can go from marginally effective to useless.