B48 Bmw Coolant Leak

Another B48 coolant leak thread All times are GMT. B48 Oil Filter Housing Coolant Leak? - SOLVED 1 reading Jump to Latest 1.9K views 3 replies 2 participants last post by alcarmad Nov 15, 2024. I've got a B48 in my F20, notorious for a number of parts that will leak coolant.

It was leaking a bit earlier in the year and I replaced a whole lot of parts as a preventative maintenance: head-to-tank coolant vent line (nearly cracked), water pump (minor coolant residue under the weep hole). How to quickly fix the dreaded BMW B48 engine coolant return line leak. Don't need to replace the whole line, just the failed connector.

Despite the praise of the B48 engine, it's coolant leaks are quite bad. Since 100k we've experienced loss of coolant. The culprits in chronological order Main vent line going to engine head.

Coolant pump and bracket. Radiator cracked at the plastic ends Auxiliary heater failed (probably ran without coolant) Auxiliary heater diverted valve. Get the turbo oil line leak addressed if your engine is affected, and keep an eye out for possible coolant leaks.

In conclusion, the BMW B48 engine brings improved reliability to the turbocharged 4. Massive coolant leak from the back of the engine All times are GMT -5. The time now is 03:42 PM.

BMW B48 Engine Oil & Coolant Leaks: Why It Happens and How to Fix It for Good Water and oil leaks in the BMW B48 engine are well-known issues. The root cause can be summed up in one sentence: the combination of plastic components, high temperatures, and frequent thermal cycling leads to premature failure of the sealing system. On this B48 motor this hose is a common failure item and when pressure testing is appears like fluid is leaking from the manifold.

The alternator must be removed and the A/C compressor pushed out of the way to replace this hose. BMW 3-Series and 4-Series Forum (F30 / F32) F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > 420i 2018 B48 CATASTROPHIC COOLANT SYSTEM FAILURE - PLEASE ADVISE Thread Tools Bookmarks twitter Facebook Digg Google StumbleUpon del.icio.us My Yahoo!