engine and drivetrain Engine (Block) Coolant Drain Plug Location?

[Simeon]

M14 x 1.5

 

The draincock I bought wont fit, as it fouls on the emboss in the block next to it as i spin it in. @#^$%&^*(!!!

 

https://fumotodirect.com/shop/standard-non-nipple/f-106

You have saved me from a similar fate as I was going to buy one of those. I note that they do various 'extenders' and have a model with an integrated extension (F106SW).

http://www.fumoto.com.au/sizes.php

[winstontj]

Probably not.  Drain plug on the rad is likely lower.  Stopcock and plastic hose would probably do the trick.  I should do that too.  It's usually a wet job otherwise.  Any pan or in my case "baby bathtub" still gets water on the subframe and floor.

 

Not to say you shouldn't drain the block.  It's the only true "flush" method for the cooling system.   Another stopcock is possible on the block.

 

On a side note: I've gone back to 50/50 coolant mix.   I found that 25% coolant attributes to wear in the water pump.   It is most notable that if my car sits for awhile, the water pump will squeal on start up until warm.   With more coolant that doesn't happen.   Better lubrication I think.

 

I am stripping a '71 chassis down to the bare shell... Not worried about getting coolant on anything, floor is epoxy painted --just don't want to make a mess and have coolant everywhere!

[RAS-2002]

Speaking of the engine block coolant drain plug (for a 1972 2002), does anyone know what the BMW part number is for it ?

I was looking on the Parts List (Section 11), but couldn't find it.

And is its threading definitely M14 x 1.5 ?

Thanks,

-Bob

[John_in_VA]

Engine Block Coolant Drain Plug - M14x1.5 - 07 11 9 904 539

 

https://www.ecstuning.com/BMW-E30-325is-M20_2.5L/ES14588/

 

Old partnumber 07 11 9 902 291

Old partnumber 07 11 9 919 158

Old partnumber 07 11 1 226 386

 

Gasket ring - A14X18-AL - 07 11 9 963 200

 

Old partnumber 07 11 9 963 213

[RAS-2002]

You guys are amazing!

Thanks!

-Bob

Engine Block Coolant Drain Plug - M14x1.5 - 07 11 9 904 539

 

https://www.ecstuning.com/BMW-E30-325is-M20_2.5L/ES14588/

 

Old partnumber 07 11 9 902 291

Old partnumber 07 11 9 919 158

Old partnumber 07 11 1 226 386

 

Gasket ring - A14X18-AL - 07 11 9 963 200

 

Old partnumber 07 11 9 963 213

[jgerock]

I am stripping a '71 chassis down to the bare shell... Not worried about getting coolant on anything, floor is epoxy painted --just don't want to make a mess and have coolant everywhere!

Here is what I dumped out of the heater core when I removed it from the 69

[winstontj]

Thanks Jim... meaning you pulled the heaterbox and that's what came out of the core?

 

I'm about to bite the bullet and do this in a few... I'll report back. 

[TobyB]

As you probably know now, if you pull the plug first, most of the coolant comes out that way.

Then when you drain the rad, most of the rest comes out THAT way.

 

And then, as you take things out, the REST of the coolant mixes on the floor to make a really slippery mess.

 

Especially if you can't get the heater valve to open on a very early car.

 

t

who needs to put one of those cool petcocks on all his cars.

[winstontj]

Thanks Toby... Almost 3am and I just finished with the mop and towels!

[TobyB]

I have never managed to do it WITHOUT the mop and towels.  Eventually, I gave up trying...

 

t

[jgerock]

Thanks Jim... meaning you pulled the heaterbox and that's what came out of the core?

 

I'm about to bite the bullet and do this in a few... I'll report back. 

Sorry for the delayed response.

 

I tape the ends of the heater core/box before I remove it from the car.  That amount is what I dumped from the core (engine was already out of the car).

[winstontj]

Thanks Jim. At this point I have a bucket, a mop, a heated garage and a fan.

 

Had to give up on trying to keep things neat and clean when I learned that my car's wonderful PO had epoxy/JB Weld/Bondo'd the lower radiator drain plug into the radiator... Lower hose had to come off. 

 

Car will be on casters by tomorrow so I can wheel it out and clean up the floor properly. 

 

EDIT: Similar but OT to coolant... While the brake system is still intact, can I just attach an empty pressure brake bleeder and blow air through all the lines? Or should I just open up each bleeder and put a pan underneath them? (pulling engine/transmission/subframe tonight so once clutch slave is detached it will no longer be a closed system)

Edited December 19, 2015 by winstontj

[TobyB]

Brakes are just like the cooling system- you can significantly reduce the leakage, but unless you're absurdly careful,

you can expect that the brake fluid will mix in with the coolant on the floor.

 

I have made adaptors to the shop- vac, and that ALMOST does it...

 

t