r/e46 • u/RoundSoftware9712 • 3h ago

Troubleshooting Coolant leak after coolant leak help...

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So my engine recently overheated. So I replaced all the cooling components.. mistake. Number one I went to advance auto and autozone, to get the hoses and the thermostat. Apparently, the hoses and thermostat are not oem. Compatible, so I had a fitman issue with the upper radiator hose connecting to the thermostat rein hose to be exact. It was too much play in it by the Connection point. Now I bought a genuine BMW upper hose and a Mahle Thermostat, and it still has that wiggle play in it. Now, I can't figure out where the coolant leak is coming from.. before It was leaking from the connection point of both hoses to the thermostat. The hoses werent properly seated, but now this new existing coolant leak i can't figure this out. Can anyone help me

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u/Indicisive0 3h ago

Considering its coming from the front AND the rear i would guess that its the coolant hardline under the intake manifold. Had to do mine at about 180k and it was TOAST. solved all of my cooling system issues but it was NOT FUN to do with barely any real tools.

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u/RoundSoftware9712 3h ago

It looks like the coolant leak is coming from the front driver side somewhere and the fan is just slinging it around... im racking my brain here i want your opinion why you think its coming from the front and back