cooling troubles!!!!

[garymillscab]

ive got 318i m40 auto the rad has the resoviour attached at the side just wondering if you can just buy the resoviour bottle becuase it has a small hole init sumwhere but cant find and losing water bad and new rad is Ԛ£110

[Brianmoooore]

One thing you will learn about BMWs is that virtually everything and even bits of everything is available from your dealer, and often far cheaper than you might expect.
Part no 17 11 1 712 835, I think, but double check with the dealer from your VIN.

[garymillscab]

would tat be for resovoir or whole rad mate cheers!!

[Brianmoooore]

would tat be for resovoir or whole rad mate cheers!!

Resevoir on its own. You may want the sealing ring as well.
Give the dealer the last 7 digits of your VIN and feed it into their ETK computer.

[garymillscab]

Now the head is cold and the bottom hot when i turn heaters on the temp rockets and there seems to be alot of pressure the water is def goin around engine as both in and out pipes are hot.What could be causing this!!!

[Brianmoooore]

Never known it on an M40, but it sounds like an airlock that you get on the M20.
Fill the header tank and pull the heater hose nearly off where it goes through the bulkhead and let some coolant/air out.