My Haines Manuel recommends to drai the cooling water at two plugs. One is the radiator's and another one should be on the left side of the engine. I can't find what Haynes means. Where is it ?

What page of the Haines manual. I don't remember reading that.

It's on the left side (drivers) of the block towards the back. It just looks like a bolt screwed into the side of the engine block. I wish I had a clear picture, but unfortunately I don't.

Directly below the heater connection to the cylinder head, immediately forward of the starter motor mount.

It is on the down hill side of the engine, not the intake side.

Edited September 1, 201014 yr by Nissanman

Here is a pic. for you: -

Hi all, thank you for your nreplies.

Johnny'O, it's on page 37 (cooling), chapter 2.4

bobc, is it that big plug underneath the exhaust of cylinder 6 ?

Nissanman, thanks for your helpful support. Unfortunately I forgot to mention my Z is a '72 240, but a friend of mine has a fourcylinder Fairlady roadster and when we talked he had the same question. I will pass your picture on to him.

Rolf

The drain one your 240 is in the same location as in Nissanman's picture. Pretty much the same for all L series engnes, 4 or 6 cylinder. That picture won't help your friend and his Fairlady roadster since those engines are different.

Edited September 1, 201014 yr by sblake01

Is it just the time of day or is age getting to me? All L-6 series blocks I've seen in Z's have the drain on the intake/exhaust side (left side) on the block down under the #5-6 exhaust area. I've seen a couple of different sized heads, but its always in the same place. Someone tell me I'm not crazy!

Jim

OK Jim, you're not crazy. I just re-did my motor (F54, N42) and that's exactly where it is. Damn hard to get to without removing the manifolds. Not impossible, but hard to get any kind of leverage under there.

Cheers, Mike

Regardless of where the plug is, you're still crazy!

Sorry, couldn't resist.

My apologies, I assumed the L4 and L6 drains were in the same place:ermm::ermm:

Take 2: -

L6 engine block coolant drain.

And I've been around so many of both, I guess I got them mixed up.