Steam vents

Swap and other information about GM's LSx series engines

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Steam vents

Post by theIrishman » Sat Nov 17, 2018 8:10 pm

Before I get too far along in putting my engine back in, I have a question about steam vents.

Question I have is: two or four? My LM7 truck engine came with just the front two. Rears are plugged? Seems like having all four plumbed would only be a good idea.


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Re: Steam vents

Post by vickysbu » Tue Nov 20, 2018 8:18 pm

You only need the front 2, that’s why the factory only used the fronts on the later engines. But be sure to bleed the system properly and thoroughly.

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