Help!!!!
Super Moderator
Joined: Apr 2004
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Back vacuum hookups? Are you talking about thermactor ports in the back of the heads?
Fleet Mechanic
Joined: Sep 2003
Posts: 1,716
Likes: 15
Yeah, I wonder what "back" meant, too.
If it means vac ports towards the rear of the top of the intake manifold, that would be scary. If its coolant, for coolant to get from the rear coolant cross-over in the intake manifold to get to an intake runner (like via a bad, wrong or improperly positioned intake manifold to cylinder head gasket), would think that one or more cylinders are filling with coolant by then. A gasket leak could also put coolant down into the Vee, onto the lifters and down into the oil sump. Loosening the oil pan plug just a few turns and seeing if coolant starts to drip out first is a simple test.
If this engine has not been run yet... don't crank it!
If it means vac ports towards the rear of the top of the intake manifold, that would be scary. If its coolant, for coolant to get from the rear coolant cross-over in the intake manifold to get to an intake runner (like via a bad, wrong or improperly positioned intake manifold to cylinder head gasket), would think that one or more cylinders are filling with coolant by then. A gasket leak could also put coolant down into the Vee, onto the lifters and down into the oil sump. Loosening the oil pan plug just a few turns and seeing if coolant starts to drip out first is a simple test.
If this engine has not been run yet... don't crank it!
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