Hi all.
Doing a routine check on my engines about 6 weeks ago and I noticed the plastic coolant reservoir was higher than usual. When I removed the radiator cap I was down about 4 litres of coolant. The coolant was real murky but when it sat for a while a rust sediment settled leaving clear red coolant on top. I git. Mechanic to come and pressure test it at rest and with the engine running and he couldn’t find any problems. I topped it up with water and gad to go away fir a month,
I went down to day to drain flush and replace the coolant and found it had lost another 3 litres of coolant while I gad been away.
There are no apparent leaks in the bilge or on engine and such large volumes of coolant loss should be detectable I would think.
The oil looks good and level has not risen.
I started the engine before I left and it ran fine sbut will bump it with the stop solenoid engaged to ensure It will turn over.
I disconnected the exhaust elbow from the turbo and it seemed dry.
My thinking at present is if it’s not in the bilge and it’s not in the engine and it’s not leaked out the dry part if the exhaust then it must be draining into the heat exchanger and into the raw water side. The header rank fir the coolant is higher than anything else.
It may also be drawing some saltwater back into the coolant system when it cools causing the rusting,
Appreciate any advice and suggestions.
Thanks?
Doing a routine check on my engines about 6 weeks ago and I noticed the plastic coolant reservoir was higher than usual. When I removed the radiator cap I was down about 4 litres of coolant. The coolant was real murky but when it sat for a while a rust sediment settled leaving clear red coolant on top. I git. Mechanic to come and pressure test it at rest and with the engine running and he couldn’t find any problems. I topped it up with water and gad to go away fir a month,
I went down to day to drain flush and replace the coolant and found it had lost another 3 litres of coolant while I gad been away.
There are no apparent leaks in the bilge or on engine and such large volumes of coolant loss should be detectable I would think.
The oil looks good and level has not risen.
I started the engine before I left and it ran fine sbut will bump it with the stop solenoid engaged to ensure It will turn over.
I disconnected the exhaust elbow from the turbo and it seemed dry.
My thinking at present is if it’s not in the bilge and it’s not in the engine and it’s not leaked out the dry part if the exhaust then it must be draining into the heat exchanger and into the raw water side. The header rank fir the coolant is higher than anything else.
It may also be drawing some saltwater back into the coolant system when it cools causing the rusting,
Appreciate any advice and suggestions.
Thanks?