Originally Posted by 2forme (Post 824241)

SST = Special Service Tool.

Ok, so I did a lot of research this morning. Thought I would share my findings.

The OEM plug is a Denso ZXE27HBR8, which will tell us all about the design of the physical plug.

ZXE - Thread Size x Hex Size - 12mm x 14mm, .55mm Iridium
27 - Heat Step - Equivalent to an NGK 9, Champion 4.59, or Bosch 2
H - Thread Reach - 26.5mm
B - Electrode Design - Triple ground electrode
R - Resistor
8 - Gap - 0.8mm (.032")

Now, with that knowledge, we can "build" a spark plug to our needs. As a general rule of thumb, for every 75-100 hp of FI, you should go one step colder in your plug. This will be your biggest concern when finding a model to fit your needs. One step up in Denso land would be ZXE31HBR8.

Unfortunately, I haven't been able to find any equivalent plugs with those dimensions. Denso, themselves don't even list them. I think it was a completely new model. It's odd to find spark plugs with 26.5mm reach.

The guide to the Denso part number spec is here (pg 12).

NGK lists a spec here.

Hope this helps everyone

Originally Posted by SmsAlSuwaidi (Post 815715)

Need ? No, but you could if you do not mind lifting your engine

Originally Posted by ANTI_LAG (Post 544201)

I never had to jack the engine up at all, I pulled the plugs from the top. Used a 1/4 ratchet with a short 10mm to remove coil pack bolt then pulled those out then used a standard 14mm socket, slid that in, then used a short extension, push that in, then just barely stuck a 3/8 standard snap on ratchet on it. As long as the car is cold I can do a plug change in about 10 mins.

Work on a 300zx turbo and it makes this car a breeze...

Originally Posted by Sportsguy83 (Post 815721)

Boom, MINDBLOWN... http://www.ft86club.com/forums/showp...1&postcount=20

This is regarding spark plug change, and I quote:

Originally Posted by SmsAlSuwaidi (Post 815724)

But but but I thought the cars manual said .... Argh nvm thanks for the info though

Originally Posted by Sportsguy83 (Post 815721)

Boom, MINDBLOWN... http://www.ft86club.com/forums/showp...1&postcount=20

This is regarding spark plug change, and I quote:

Originally Posted by King Tut (Post 822381)

That did blow my mind. I was thinking about pulling mine to check them along with a quick compression check.

Originally Posted by 2forme (Post 822394)

How are you going to get a compression tester to "screw" in?

Originally Posted by King Tut (Post 822417)

I don't know about yours, but my compression tester has a flexible rubber hose that screws into the spark plug hole. Then I connect it to my gauge.

Originally Posted by 2forme (Post 822394)

How are you going to get a compression tester to "screw" in?

Originally Posted by Huehuecoyotl (Post 822440)

how do shop techs do it>? I cant see it fitting, but I have clumsy hands