I had a significant blowby issue on my 3bt a few months ago and turned out to be a bad head gasket. Like others have already said, start with the compression test.
Agree with the above, 1000% go with OEM, any experienced 3B guy will tell you this. Here is an aftermarket gasket that lasted me about 50,000 km. Trust me you don't want to do this job over again
I feel most people south of the border just don't get it. And it's understandable given that the 3b was not provided to their market. It just doesn't make sense for them.
I love the 3b engine as they are dead simple to work on even for noob mechanics. Sure you can spend as much money as you...