390Express
Regular Contributor
454 Crusader, complete closed cooling system (only the risers and exchanger are raw water cooled). I did a valve job on the starboard engine this year. All back together, running well, but overheats after about 5 minutes.
When I was disassembling the engine for the valve job, I drained an astonishing 5 gallons (and that did not include the block). I filtered the drained coolant while putting it back in, and likely spilled a gallon in the process of draining and filling it.
I'm trying to figure out if I just need to "burp" air out of the system to get it to run cool, or if I have a bigger issue. I noticed that upon cool down, most of the heater hoses collapsed hard, not sure why. While the engine was running and getting hot, the heat exchanger remained cool. I pulled the top vent bolt on the exchanger while it was running, and only air came out... Then I shut the damn thing off as it was heating up, left the vent bolt out, and lost about 1/2 gallon of coolant out of the vent. (OOPS!) Seems like coolant is circulating through the heat exchanger, just have to figure out if anything is malfunctioning, and if not, the best way to get air out of that enormous system.
The risers always remained cool, the raw water side seems to be doing its job.
When I was disassembling the engine for the valve job, I drained an astonishing 5 gallons (and that did not include the block). I filtered the drained coolant while putting it back in, and likely spilled a gallon in the process of draining and filling it.
I'm trying to figure out if I just need to "burp" air out of the system to get it to run cool, or if I have a bigger issue. I noticed that upon cool down, most of the heater hoses collapsed hard, not sure why. While the engine was running and getting hot, the heat exchanger remained cool. I pulled the top vent bolt on the exchanger while it was running, and only air came out... Then I shut the damn thing off as it was heating up, left the vent bolt out, and lost about 1/2 gallon of coolant out of the vent. (OOPS!) Seems like coolant is circulating through the heat exchanger, just have to figure out if anything is malfunctioning, and if not, the best way to get air out of that enormous system.
The risers always remained cool, the raw water side seems to be doing its job.