Does anyone have experience with Rein coolant hoses? Thy are a fifth of the cost of the genuine BMW ones?

RUN AWAY FROM REIN

They are junk

Stick to Genuine hoses and cooling system parts for the love of God

Here's a pic. Much easier to remove this piece imo than removing the water pump. The orings are 5&7 and the gaskets which need to be replaced are 2. It's 6 bolts and it's off.

http://i1124.photobucket.com/albums/...7316169F04.png

Ok that makes more sense with what you were talking about. Those metal pipes don't go bad it's the orings that go bad and if I remove that rear piece I can just replace the o rings that way.

Thanks for the help.

And sounds good on the BMW hoses and it's what I figured the response would be to that question!

To test for a leak tap water is fine. You will be draining some of the system to fix the leak and you can easily drain the rest. It sounds like it was a catastrophic failure of a cooling system component rather than a big leak. Pressure testing is the best way to check the system but I don't think you will need to do so in this case. I would fill it up and see if it runs out anywhere on its own. If not, I would start it up and verify the source. Circumstances as you describe are most often a ruptured hose. Often the rupture is at a hose clamp. That's my guess to add to the others.

If you think its the crossover pipes or pipe seals, I would replace the metal crossover pipes, too. The ends were pitted on mine, and I tried to polish that out, but it ended up with a slow steady leak there. Its never fun to do the job the second time... The metal pipes are not that pricey on the M62 and not that hard to remove. Spend some serious time cleaning the grooves where the end seals sit for those pipes. Mine were filled with corrosion and grit.

Anyway, the cross over pipe would not be high on my list as a source of a gusher either. The seal sits between two metal parts - even if the seal is toast, you wouldn't get a flood coming out. A burst hose or cracked plastic hose end would open up a big hole that could loose a lot of fluid in short order.

The other big leaker is the valley pan gasket/plate. BMW has provided an updated pan with gasket. Requires removal of intake manifold, coolant pipes, etc. It makes sense to renew the oil separator and crankcase ventilation fitting on intake manifold while you have dug in tat far.
I found the rear coolant manifold a pain to get re-installed.

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I am adding a bunch of part numbers to a list so when I get under the car this weekend I already have everything written down.

I can't find anything on crankcase ventilation fitting for the intake manifold

If you could point it out that would be great

RealOEM.com - Online BMW Parts Catalog

Cheap aftermarket hoses. Good for about 2 years. Do yourself a favor just make the plunge and put the genuine hoses on the vehicle. With all that you have to remove to access the hoses, the number of places for possible leaks its worth the piece of mind to put a good quality set in its place. If you were going to flip the vehicle in the short term I could possibly see using this brand (now you have created a future headache for someone else).:thumbdown

Agreed!!!!:thumbup: