Author Topic: coolant flow.... (Read 4410 times)

jakeb · « **on:** June 13, 2010, 08:53:31 PM »

I was wondering if anyone know the direction of coolant flow in the m42. Mostly I am wondering about the return line that goes to the overflow tank. I am wondering if I can plug that. I am installing a m42 in a 67 BMW and I would like to use the stock radiator, but it doesn't not use a overflow tank. So I need to find a spot to "put" the return hose. Can it be plugged or can it go to a T on the top radiator hose?

BlueBMW · « **Reply #1 on:** June 13, 2010, 09:34:09 PM »

I'm not sure on the answer to your question, but when you get it done I'm sure a lot of us would like to see pics of the finished job! (unless of course you've already posted them somewhere else on this site)

cristimm · « **Reply #2 on:** June 14, 2010, 02:25:05 AM »

Quote from: jakeb;93536

I was wondering if anyone know the direction of coolant flow in the m42. Mostly I am wondering about the return line that goes to the overflow tank. I am wondering if I can plug that. I am installing a m42 in a 67 BMW and I would like to use the stock radiator, but it doesn't not use a overflow tank. So I need to find a spot to "put" the return hose. Can it be plugged or can it go to a T on the top radiator hose?

On any car the lower hose is the radiator exit and the upper hose is the radiator inlet.

jakeb · « **Reply #3 on:** June 14, 2010, 08:31:55 PM »

Does anyone know if the coolant pipe that goes along the drivers side block is just a return? Or does all the coolant return to the radiator through that pipe to the overflow tank?

Mostly I am wondering if I can just plug that hose (that normally goes to the tank) and all will still work. Otherwise I will T it back into the upper rad line.

B318M42W · « **Reply #4 on:** June 15, 2010, 01:02:03 AM »

why not take the stock M42 radiator and stuff and put it in?

jakeb · « **Reply #5 on:** June 15, 2010, 06:27:09 AM »

It is a little too big to fit in the chassis that I am doing this swap on. I have a 2002 with a m42 as well and the m42 rad fits fine but not in this car.

Also I really would like to keep the stock radiator, it keeps things looking more 'stock'

jakeb · « **Reply #6 on:** July 07, 2010, 05:46:47 PM »

any one?

one person on r3v said it was the main feed to the water pump...if that is true I need it hooked up. Can I hook it too the top rad hose, or lower?

jakeb · « **Reply #7 on:** July 07, 2010, 08:11:46 PM »

here is a pic of the swap

jakeb · « **Reply #8 on:** July 07, 2010, 08:20:52 PM »

Victorymike18 · « **Reply #9 on:** July 10, 2010, 11:39:21 AM »

It's looking pretty neat and tidy so-far.

Could you take one or two closeup pics of the bracket on the driver side that you have the fuses and (diagnostic?) plugs on? Looks good.