I pulled the intake from a 92- 350 tbi engine. It was the worst oil build up I have ever saw. The head/intake gasket on the rear water flow ports only has a weep hole on both sides. The front water ports are open just like the fuel ports part of the gasket. With the rear ports sealed up except for a 1/4" port hole cause this engine to over heat? And would it work better with open port gaskets to help with less restriction for the water to flow? I am just wondering why this gasket was made like this before I put the tbi intake on my 305.
weep hole in head gasket
- Thread starter Dustytrix
- Start date
theres very little or no flow between the rear head coolant ports, on a sbc intake even if there is a coolant passage in the intake manifold,many sbc intakes don,t even have a connection port for coolant between the ports to allow coolant flow. so no its not a big deal.
viewtopic.php?f=57&t=149
viewtopic.php?f=57&t=853
on the first generation small block Chevy the coolant is drawn from the lower radiator hose by the water pump, and forced into the front of the block where it travels along the cylinder walls then after all the areas filled it moves upward into the cylinder heads thru holes in the head gasket that were designed to be small enough, to slightly slow the flow upward into the heads where the coolant thats absorbed cylinder wall heat will reverse direction and travels forward into the forward , in the cylinder heads collecting more heat until it flows thru the forward intake manifold coolant ports that direct the coolant to the t-stat and from there to the upper radiator hose that allows the coolant to drain back as it flows and cools thru the radiator to the lower radiator hose to complete the cycle.
this route tends to sweep any trapped air out of the system but its not ideal because the cylinder heads produce most of the engine heat, so the route was reversed in the second generation LT1 small blocks to insure the cylinder heads operated a few degrees cooler to reduce the tendency to reach detonation heat levels
viewtopic.php?f=57&t=149
viewtopic.php?f=57&t=853
on the first generation small block Chevy the coolant is drawn from the lower radiator hose by the water pump, and forced into the front of the block where it travels along the cylinder walls then after all the areas filled it moves upward into the cylinder heads thru holes in the head gasket that were designed to be small enough, to slightly slow the flow upward into the heads where the coolant thats absorbed cylinder wall heat will reverse direction and travels forward into the forward , in the cylinder heads collecting more heat until it flows thru the forward intake manifold coolant ports that direct the coolant to the t-stat and from there to the upper radiator hose that allows the coolant to drain back as it flows and cools thru the radiator to the lower radiator hose to complete the cycle.
this route tends to sweep any trapped air out of the system but its not ideal because the cylinder heads produce most of the engine heat, so the route was reversed in the second generation LT1 small blocks to insure the cylinder heads operated a few degrees cooler to reduce the tendency to reach detonation heat levels