Engines cooling system hack

engine overheating, no visible leaks but consuming 2l an hour. After 45min engine has to be switched off, cooled down and refilled with wate

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Im was trying to come with a solution and I figured out because I have two radiator caps I can pump water back in to the system whilst drive.

I figured that because I have two radiator caps one rated at 15psi and and one at 16psi I should be able to use a pump with high enough pressure to refill the radiator whislt the system is still under pressure.

I will attach the pump to the 16 psi cap that will should prevent backflow to the pump as the excess pressure should leave through the 15psi cap. I want to prevent backflow because  I am trying to keep the pump clean for later use with drinking water.

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Dan Maloney wrote 09/11/2019 at 14:53 point

I'm just going to guess that you've got a leaking head gasket. The coolant has to be going somewhere, and if you can't see a leak it's probably entering one or more cylinders through the blown head gasket and going out the exhaust pipe. Depends on the car and your DIY skills, but it could be a cheap-ish fix. I'd also be leery of topping up the cooling system with plain water - that'll dilute your coolant and reduce its antifreeze and boilover protection.

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null wrote 09/12/2019 at 05:04 point

I believe you are right Dan. The original owner used a chemical sealant to attemmpt to fix the problem. I didnt know this when i bought it but only realised after. I've tried two different chemical sealants since and they have made a modest improvement however still the issue remains. The thing to fix it correctly would be to replace the head gasket or the engine. However I need to drive it tommorrow for a camping trip so I'm going to rig up my pump and see how she goes.

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Dan Maloney wrote 09/12/2019 at 14:50 point

So not a long term fix, but a quick hack. Understood. Best of luck with the trip, hope she behaves for you!

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Tom Nardi wrote 09/25/2019 at 05:55 point

Had a similar situation on an older car of mine. I didn't want to spend the time/money on actually replacing the head gasket, so did some research and tried to find the best of the chemical fixes.

The one I got ended up actually working quite well, but eventually it failed again. Though I certainly can't complain, it got more life out of the engine than I would have otherwise.

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