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Hello,
Leaks can be caused by using the wrong style of lead(pronounced leed, like leader) pipe on the B16 exhaust manifold.
The correct style of lead pipe has a small amount of the pipe sticking through the end of the flange. The part of the tube protruding beyond the flange is supposed to go into the end of the exhaust manifold.
Without the benefits of the extra sealing of the correct configuration, the gasket will fail prematurely.
I have never seen an aftermarket lead pipe that was made correctly and I have ALWAYS had to buy them from Volvo.
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Eric Hi Performance Automotive Service (formerly OVO or Old Volvos Only) Torrance, CA 90502
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