About to buy headers, need help verifying head

[funkadelik]

Hello,

My first major work on the car and I'm having trouble identifying the head. I noticed the car had a rebuilt engine since there was a tag saying so on the block. Attached is a few pictures. One of the head and another of the intake manifold. There is a N42 stamp on it but looking at other pictures of an N42 head this one appears to be different. HELP?! I don't want to purchase the wrong headers.

As you can tell this looks way different than the pics on this auction item: http://www.ebay.com/itm/Datsun-Z-240Z-260Z-280Z-ZX-Rebuilt-N42-Cylinder-Head-/400244055278?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item5d30679cee

Last, I included a few pics of some damage to the head I noticed while pulling it off.. How bad of an impact would this have on my car? Would it cause abnormalities? Smoking? Funny, this all started with a head gasket replacement :/

[Arne]

I'm not an expert on identifying the various heads, but that definitely looks like a round-port head to me.

As for the damage, I'd bet that was the cause of the head gasket failure. You'll need to have that head repaired, or replace it with a different head.

Lastly, do some research on that particular ebay seller before sending him any money....

Edited October 17, 2011 by Arne

[funkadelik]

Yeah, it doesn't seem like an N42 head. Any ideas what it actually is? It's weird but it's stamped N42... Im not looking to buy the head, just wanted to post it as a reference. I'm unsure if I should buy rounded headers now

[Zed Head]

Did you also post over on Hybridz? I saw a similar N42 head over there. It's definitely different from the stock domestic square port exhaust N42. My N42 head looks like the E-Bay head.

That looks like water passage rust damage in Picture #5. There might be more in other water passages. I've read of rust eating all the way in to the exhaust port. You might look a little deeper in to how much rust damage is there.

[funkadelik]

I can't post on HybridZ for some reason :/ I know it's stamped N42 but it's really starting to look like a N47 the more pics I look at. Ahh

[siteunseen]

I've read that square port headers will cover round or diamond head ports without leaking. that triangle 3 bolt plate up front by the timing chain is on my n42 but cast over on my original n47, your picture #6 shows it. it was for a mechanical fuel pump.

Edited October 17, 2011 by siteunseen