Coolant Leak Under the Intake Manifold

[samer0214]

Thanks you guys for the quick reply. One question I am trying to have answered is: Would there be coolant on TOP of the valley pan cover if the Y connector WAS NOT broken?

Unless I'm missing something, I'm not seeing how coolant would end up there.

[AV8R4AA]

Since you have coolant on top, I can't perceive how it would get there
UNLESS the Y pipe was compromised.

What is your repair plan?

[samer0214]

Originally Posted by AV8R4AA

Since you have coolant on top, I can't perceive how it would get there
UNLESS the Y pipe was compromised.

What is your repair plan?

Originally Posted by BCREDLINER

Could be valley pan gasket but coolant pipe leaks that are not unusual are far more likely and coolant does collect on top of the valley pan.

Popular wisdom and common sense dictate that since I'm already in there, is to replace the valley pan cover, coolant pipe & even the water pump.

Two things working against me right now: time and money. This is my wife's daily driver and it's been out of commission almost going on 2 weeks now, so it's time to button it up. Add to that 2 Land Rovers at home that also need some attention, so the decision is to just replace the broken hose assembly at this point in time. I will have to tear through the engine soon enough, since the valve guides need replacing, at which point I will replace the valley pan cover and W/P.

I have earlier today bought the new hose assembly, intake manifold gaskets, throttle body gasket and 2 VANOS O rings (original BMW parts all), and will put it back together and back on the road.

Anything else I should do/replace while I'm there before putting it back together?

[samer0214]

Put it back together, and everything went smoothly. I fired it up and the coolant leak is fixed, but I now have another issue:

When it was idling, it misfired and the CEL came on. Pulled the codes, and found many due to misfires and a "main" code about the cam position sensor.

I made sure everything was plugged back in before I fired it up, what am I missing? Is it possible to mix up the connectors?

[X53Jay4.8is]

Originally Posted by samer0214

Thanks you guys for the quick reply. One question I am trying to have answered is: Would there be coolant on TOP of the valley pan cover if the Y connector WAS NOT broken?

Unless I'm missing something, I'm not seeing how coolant would end up there.

What does it matter anyway. At this point you should really be considering doing a cooling system upgrade repair due to the age of the vehicle and the fact that you have leaking coolant. Don't try to fix what you think is the one leak button it all back up to find out that an another leak persists. Just take the path of peace of mind and do the cooling system maintenance. There are countless accounts of folks with the 4.8is and coolant leak problems. All of which can be solved doing the cooling system maintenance.

[samer0214]

Originally Posted by X53Jay4.8is

What does it matter anyway. At this point you should really be considering doing a cooling system upgrade repair due to the age of the vehicle and the fact that you have leaking coolant. Don't try to fix what you think is the one leak button it all back up to find out that an another leak persists. Just take the path of peace of mind and do the cooling system maintenance. There are countless accounts of folks with the 4.8is and coolant leak problems. All of which can be solved doing the cooling system maintenance.

Too late now Jay, that train has long left the station! It's all back together, but I'm dealing with a new issue of the misfire due to a Camshaft sensor error.