I found out this week that the Lenco heat exchanger I got (used) is a "half system" which is fine. My engine is a 1979 5.7 and I have log style exhaust manifolds. The ends on each manifold have a hose attachment nipple. The risers have one nipple on each one. The manifolds are new, the risers are from my original engine that was raw water cooled. The guys at Lenco told me where to attach each hose. That's where the confusion started. The info I got was to attach the two raw water hoses to the "bottom" of the manifolds.
I'm not sure what they meant by "bottom of the manifold"........ is that the front of the manifold? That could make sense to me if my understanding of how the cooling system is correct, I'll explain my perception of how the cooling systen works.....
The pump in the outdrive sends raw water up through the power steering fluid cooler. It then travels into the heat exchanger cooling the engine antifreeze. It then travels out of the heat exchanger through the exhaust manifolds and back out to the lake/ocean.
Isn't that how it works? If so....... here is question #1, where on each log style manifold do I hook up the hose that will send the raw water back to the lake/ocean? Do I need to use both ends on a manifold or cap one end off? Question #2, what gasket set do I use? Do I need to use the stainless steel part of the gasket set or just the gaskets? And last question is, do I need to get a raw water pump (the kind that works with a V-grove belt from the crank pulley) or is the water pump in the lower unit all that is required?
Can anyone direct me to where I can get the answers I'm looking for? Thanks in advance
I'm not sure what they meant by "bottom of the manifold"........ is that the front of the manifold? That could make sense to me if my understanding of how the cooling system is correct, I'll explain my perception of how the cooling systen works.....
The pump in the outdrive sends raw water up through the power steering fluid cooler. It then travels into the heat exchanger cooling the engine antifreeze. It then travels out of the heat exchanger through the exhaust manifolds and back out to the lake/ocean.
Isn't that how it works? If so....... here is question #1, where on each log style manifold do I hook up the hose that will send the raw water back to the lake/ocean? Do I need to use both ends on a manifold or cap one end off? Question #2, what gasket set do I use? Do I need to use the stainless steel part of the gasket set or just the gaskets? And last question is, do I need to get a raw water pump (the kind that works with a V-grove belt from the crank pulley) or is the water pump in the lower unit all that is required?
Can anyone direct me to where I can get the answers I'm looking for? Thanks in advance