Bubblegtt
Well-Known Member
If it's not car's, it's boats, always something to do. Today we are descaling the raw water cooling system with Rydlyme, with my home made pumping kit, to flow through the system for three hours. That will hopefully cure the overheating when going flat out 
I bought a 30 litre barrel, hoses, inline taps, and connectors from eBay. All in half inch to match up with the pump that I bought from the chandlers. The feed comes out of the bottom of the barrel, through a filter and then the pump.
I connected the feed to the gearbox cooler. I used a car steering rack gaiter and an inline tap so that I could shut the flow off. The return was connected in a similar fashion to the exit of the heat exchanger, just before it enters the exhaust. I removed both impellers and let it pump for 3 hours on each engine.
Then fitted new impellers, primed the system and ran it up on fast idle for half an hour, while checking for leaks.
The starboard engine is a complete arse to get onto the heat exchanger and I had to get my work colleague, who is smaller than me, to get down into the bilge.
I bought a 30 litre barrel, hoses, inline taps, and connectors from eBay. All in half inch to match up with the pump that I bought from the chandlers. The feed comes out of the bottom of the barrel, through a filter and then the pump.
I connected the feed to the gearbox cooler. I used a car steering rack gaiter and an inline tap so that I could shut the flow off. The return was connected in a similar fashion to the exit of the heat exchanger, just before it enters the exhaust. I removed both impellers and let it pump for 3 hours on each engine.
Then fitted new impellers, primed the system and ran it up on fast idle for half an hour, while checking for leaks.
The starboard engine is a complete arse to get onto the heat exchanger and I had to get my work colleague, who is smaller than me, to get down into the bilge.
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