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If I were to buy a KL-ZE how do I know I got a real KL-ZE and not a KL-03?<P>Are there any markings or outside signs or are the differences between the two engines only internal?<P>------------------<BR> dorin@canada.com

I was also wondering what the diff. between these engines was...i know the HP is different, but whats different?? Compression level???

From what I gathered the compression ratio is higher on the KL-ZE than the KL-03. I think this means the pistons are different.<P>Come on you veteran MX-3ers, any hints as to how one can tell a KL-ZE apart from a KL-03 without riping the engines apart?<P>------------------<BR> dorin@canada.com

Yeah, it's tough for most people to tell the difference.<P>The only real way that I know of to tell the difference (on the surface) is to look at the cylinder head serial numbers. On a regular KL engine, it will read KL1A1 or KL4 or KL4G or some variation on these numbers.<P>KLZE will say KL31 (and will be proceeded by 1A1). Only ZE's use the KL31 designation. This number can be found on the rear of the head, just under the valve cover. Be sure that whoever you buy it from reads you these numbers, and don't clue them into what it should be! Most engine importers don't know the difference, but once they find out what numbers you're looking for, they may try to mislead you.<P>Hope this helps with your search!<P><BR> <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by dorin:<BR><B>From what I gathered the compression ratio is higher on the KL-ZE than the KL-03. I think this means the pistons are different.<P>Come on you veteran MX-3ers, any hints as to how one can tell a KL-ZE apart from a KL-03 without riping the engines apart?<P></B><HR></BLOCKQUOTE><P><P>------------------<BR>Hank<BR>'92 GSR<BR>2.5L KL-ZE

They also have a bigger intake manifold, too,

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Bbqman218:<BR><B> They also have a bigger intake manifold, too, </B><HR></BLOCKQUOTE><P>Do you know how big it is? I don't have a KL-03 handy to compare it to so some kind of numbers would be very helpful.<P><BR>

Hey Dorin, look here<P> <A HREF="http://www.naplenews.com/staff/fortier/ ... lcome.html" TARGET=_blank>http://www.naplenews.com/staff/fortier/ ... me.html</A> <P> Then scroll to the bottom of the page and click on "KLZE" he shows a o3 and ze side by side. the ports on the intake are larger than the 03. <P>[This message has been edited by Bbqman218 (edited August 15, 2001).]<p>[This message has been edited by Bbqman218 (edited August 15, 2001).]

Crap , the site isnt working. I went on aol and did a search , KLZE I did it in all caps. the first one that came up,(Bay Area Probe Owners Club) was the one I picked. Then I clicked on Mikes Probe GT. You may try going to <A HREF="http://www.aol.com" TARGET=_blank>www.aol.com</A> first then type in KLZE if you dont have aol. Chris <P> I double checked the address and what is written above is what it says on the address. I dont know what I did wrong. <p>[This message has been edited by Bbqman218 (edited August 15, 2001).]

<A HREF="http://www.naplesnews.com/staff/fortier ... lcome.html" TARGET=_blank>http://www.naplesnews.com/staff/fortier ... me.html</A> <P>you missspelled it, theirs an S between your naple and news <P>------------------<BR>Thanks,<BR>Teri<BR>'93 MX-3 SE soon to be a GSR<P>http://www.geocities.com/warmachinex0/MX-3GSSE.html

Thanks For fixing that! I was having the biggest arguemnt with this computer, I thought I was losing my mind, I checked and rechecked and it still would nt do it. All I can say is , It was Late, THanks

Thanks for the help. If anyone else needs the info, it is possible to tell the KL-ZE apart from the KL-03 from the outside, mainly by the intake manifold. The Superprobe page at <A HREF="http://www.naplesnews.com/staff/fortier ... lcome.html" TARGET=_blank>http://www.naplesnews.com/staff/fortier ... me.html</A> has a few pointers on how the intake of the KL-ZE is different. There is also a side-by-side picture of the KL-ZE and KL-03 at <A HREF="http://www.geocities.com/MotorCity/5335/klze.htm." TARGET=_blank>http://www.geocities.com/MotorCity/5335/klze.htm.</A>

<A HREF="http://www.magicpuppet.com/sonicprobe" TARGET=_blank>www.magicpuppet.com/sonicprobe</A> Take a look at my site. May help you out a little....<P>------------------<BR>Mazda Powered 93SonicProbeGT<BR>AIM:Benkrys

The post by Hank about looking for the cylinder head serial numbers at the rear of the head under the valve cover came close to driving me batty (a short trip for those who know me!)!<P>I could not find ANY cylinder head numbers at the rear (opposite end of cam drive) of the radiator side head (one with distributor), either external or internal. However, I did notice "KL 31 431" stamped into the intake CAMSHAFT. Are these the numbers you're referring to, Hank?

Found it! Numbers are found underneath valve cover flange about midway down the head on the INTAKE side, "KL31-1A1".