heater bypassed?

[wolverine_sr24]

So I bought my 325es 2 years ago and the heater has been bypassed by the previous owners. I was wondering if there is anyway to know if the heater is cracked. On cold nights I can feel cool air coming from the vents. is that a sign that it is cracked?

any tips to find out if it is?

[efficient]

Pour some water in the heater pipes to see if it leaks.

[Das Delfin]

The way to tell if your heater core is broken is to connect it to the motor and try to run it. I had an old saab which had a failing heater core and coolant would leak out every so often from the middle-front of the car. Just hook it up and pay attention to where the leaks are.

[wolverine_sr24]

ill let you know what happens tommorow. I really want a heater lol

[wolverine_sr24]

okay so I added water through the heater core holes, and so far no leaks. so now how do I reattach the hoses? does it matter which hose goes to what hole?

[nando]

I would be willing to bet it is cracked, or why would it be bypassed? it might not leak with cold water, but it probably will with hot water under pressure.