Stock 71 240z engine pictures

[woytovich]

I'm looking for detailed pics of a truly stock 1971 engine... restored to stock is fine too.

I am getting a 71 that I need to just get running before I consider upgrades to the engine and I want o be able to see what is missing or has been modified...

These are pics of what I have...

Thanks,

Mark

[Arne]

HLS30-37705, build date 7/71. First five are from three years ago when I bought it, the last two are a couple of months ago.

[woytovich]

Thank you!!!

[five&dime]

My dads engine bay in his 70

<a href="http://www.flickr.com/photos/14049800@N00/2605986529/" title="IMG_9168 by RVAE34, on Flickr"><img src="http://farm4.static.flickr.com/3261/2605986529_7ff1a99409_b.jpg" width="1024" height="683" alt="IMG_9168" /></a>

<a href="http://www.flickr.com/photos/14049800@N00/2611722439/" title="IMG_9284 by RVAE34, on Flickr"><img src="http://farm4.static.flickr.com/3008/2611722439_84a7cdb694_b.jpg" width="1024" height="683" alt="IMG_9284" /></a>

<a href="http://www.flickr.com/photos/14049800@N00/2612559530/" title="IMG_9287 by RVAE34, on Flickr"><img src="http://farm4.static.flickr.com/3203/2612559530_d63d3b38d9_b.jpg" width="1024" height="683" alt="IMG_9287" /></a>

[woytovich]

My engine appears to be "desmogged"... is there an accepted process for this on these engines? (I know there are accepted "instructions" for the motors in my other vintage vehicle obsession, Toyota Land Cruisers)

[five&dime]

My dad informed me that all the smog stuff was removed from this one. I had forgotten about that.

Before photos

<a href="http://www.flickr.com/photos/14049800@N00/766235250/" title="IMG_2615_2 by RVAE34, on Flickr"><img src="http://farm2.static.flickr.com/1167/766235250_218c261082_o.jpg" width="1280" height="960" alt="IMG_2615_2" /></a>

<a href="http://www.flickr.com/photos/14049800@N00/766235220/" title="IMG_2614_2 by RVAE34, on Flickr"><img src="http://farm2.static.flickr.com/1247/766235220_f9387afdb3_o.jpg" width="1280" height="960" alt="IMG_2614_2" /></a>

[woytovich]

"My dad informed me that all the smog stuff was removed from this one."

Thanks for the before AND after pics... can you (or your dad) tell me what all was removed and what was done, if anything, to compensate? Alternate routing of vac lines? Carb or timing adjustments?

Has it been a "successful" desmog?

Mark

[Arne]

Mark, the emission controls on a '71 240Z are simple, with few parts, and really very little effect on how the car runs. Looking at the pictures of yours, it has already been de-smogged. On your car the smog pump and associated plumbing has already been removed, and the air injection on the exhaust manifold has been capped. The vacuum ports on the manifold balance tube have been capped off where the anti-backfire valve (for the air injection) and throttle opener have been removed. Generally, no carb adjustments are necessary, or even desirable.

So I'd say it's done, and not to worry about it. Nothing additional is needed. You could remove the air injection rail from the exhaust manifold and plug the holes for appearance sake, but it doesn't hurt anything where it's at, and chances are that it'll be rusted in place and not easily removable anyway.

[woytovich]

Thanks guys... I've been on this forum for 2 days and I've already learned a whole lot... I WOULD like to clean up the caps (the plumbing pipe cap looks bad) and take out the air rail (if it'll come out - a job for PB Blaster no doubt). Are there known plug sizes and/or sources for nice looking plugs?

[kenz240z]

Pull the stock exhaust manifold from the engine and put a header on it...no holes to plug!:classic:

[kenz240z]

You're gonna need a battery and a spark plug wire to the #5 plug

[Arne]

Thanks guys... I've been on this forum for 2 days and I've already learned a whole lot... I WOULD like to clean up the caps (the plumbing pipe cap looks bad) and take out the air rail (if it'll come out - a job for PB Blaster no doubt). Are there known plug sizes and/or sources for nice looking plugs?

IIRC, the plugs need to be BSP thread (British Standard Pipe).

But in my experience on these, if the first fitting you try doesn't break loose fairly easily, you may as well stop there and not waste any time on it. If they are rusted, no amount of PB Blaster or whatever will get them out. I'll echo the comment above - you'll probably either want to live with it as is, or swap to a header. If either of the manifold studs at the ends of the exhaust manifold are broken or bent, definitely don't waste your time and plan for a header, as that is an indication that the manifold has warped.