M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: jakeb on June 13, 2010, 08:53:31 PM

Title: coolant flow....
Post by: 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?

Title: coolant flow....
Post by: BlueBMW 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)

Title: coolant flow....
Post by: cristimm 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.

Title: coolant flow....
Post by: jakeb 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.

Title: coolant flow....
Post by: B318M42W on June 15, 2010, 01:02:03 AM

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

Title: coolant flow....
Post by: jakeb 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'

Title: coolant flow....
Post by: jakeb 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?

Title: coolant flow....
Post by: jakeb on July 07, 2010, 08:11:46 PM

here is a pic of the swap

(http://theguestroom.net/67_2000/IMG_2088%20%28Medium%29.jpg)

Title: coolant flow....
Post by: jakeb on July 07, 2010, 08:20:52 PM

(http://theguestroom.net/67_2000/IMG_2088%20%28Medium%29.jpg)

Title: coolant flow....
Post by: Victorymike18 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.