List of E-series cylinder heads - Page 7

b12brothers · Mar 27th, 2008, 04:40 PM

Now that we are at the heads what about the valve seats.
My E16I (we call them the german because the only few which are or were running here in Luxemburg are from Germany) runs with unleaded because of the cat.
So, my Nissan dealer told me it would not be recommendable to interchange the heads because they have different valve seats, even by changing timing the engine would not last very long.
As it seems, the seats of a E16I are harder than those of the E16S.
Is it the case everywhere or just here in Europe?

blownb310 · Mar 27th, 2008, 04:58 PM

That's not the case in the US. All of ours have the hardened seats for unleaded fuel.

b12brothers · Jun 11th, 2008, 02:36 PM

For the 33M head 24,5cc there is no need of valve reliefs and the pistons got 17,9cc, right?

The 15M head has only 17,9cc and for this head reliefs are needed because the valves are nearer to the piston top.

My question is, what did they do with the heads to keep the same shape? Itook a look at both and the only difference is the shape of the chamber (spherical and poly-spherical) the cam, rocker arms, valve springs and everything else is at the same place also valve angle is the same or else the rocker arms wouldn't fit. Valve lenght is also the same.

blownb310 · Jun 11th, 2008, 04:41 PM

I'm a bit rusty on E-series head tech, but I believe the valves are 1mm larger in diameter on the 15M heads and that has something to do with the necessary valve reliefs on the matching pistons for those heads too.

b12brothers · Jun 12th, 2008, 03:30 PM

Yeah, but what about the head?

I forgot a ? in the last post. So are the valves length different?

The valve reliefs in the pistons for larger valves that's o.k.

Valves must be shorter because combustion chamber is deeper.

b12brothers · Sep 4th, 2008, 04:24 PM

sorry wrong button

b12brothers · Sep 4th, 2008, 04:30 PM

The 15M head with the 37/31 valves is still available here in Luxemburg under part #11041-73A00 for 1230,47 Dollar (841 EURO) without valves.

I got a used one and I guess that here is the right place to ask if someone wants one.

I would like to keep the head myself but the cost for putting it back in working condition is nearly the double of a new one, so perhaps your shops might do it for less.

So here a little story to the head why it is in this condition and some pics.

few years ago I took off a cyl. head to replace the gasket (did the gasket for nothing because I found out that it was the gasket between the carb and manifold that was bad and here coolant got sucked into comb. chamber) before immobilising the car I took a second head to the machine shop to get it checked to be shure not putting a cracked one one the engine.
When the gasket change was done I gave that head to the shop for a check so I would have an "emergency" head (that's why the surface is so clean).

But a "friend" needed a head because his was cracked and a new one was too expensive.
I gave it to him and got myself another one from the junkyard.

Some time later he gave it back to me in that condition saying that he wanted to replace the guides (why ??? they were good) some are removed some broken and one with a valve stem in it.

b12brothers · Sep 14th, 2008, 06:39 AM

No E fanatics here anymore?

b12brothers · Oct 3rd, 2008, 04:29 PM

Guys for free, just have to pay shipment

ching_84 · Feb 20th, 2009, 03:41 AM

hi newbie here, did learn quite lotsa knowledge about e-engine here.
Did any1 know volume of the chamber from the e13 head and the piston??
from the info i get , it has 9.0:1 cr , 76mm bore and 70mm stroke
i get 39.6875 cc combustion chamber from the calculation.
it will raise the cr of e15 and e16 with such small combustion chamber rite?

jakesmith · Feb 20th, 2009, 05:45 AM

Hi Everyone,
This is Jake Smith & I am new member here...
I like This Forum....
Thanks!.....