2JZGE SPARK PLUG COVER
Next files I have are for a basic 2JZGE Non-VVTI spark plug cover plate. There's a handful of people that have these right now (myself and Ali included). My goal when making this was not to make them a absolute perfect molded $300 show car piece, but rather to make something that fit well, looked good, while being extremely affordable so even the poorest high school kid could have one. So here it is. Very affordable because it can be cut from just flat sheet of whatever material you want (ABS Plastic, Aluminum, Stainless, CF, cardboard lol) which is what keeps it extremely affordable.
Now you have to pay particular attention to what style valve covers you have. You need to figure out if you have the 1992 style valve covers, or the 1993+ style valve covers. I never even realized there was a difference until I started making these plates. So when using these files, make sure you use the correct one for your style valve covers.
1992 Style Valve Covers -
see the red boxed in portion, see how valve covers are inline with the plastic plug cover
1993+ Style Valve Covers -
see the red boxed in portion, see how exhaust side valve cover IS NOT inline with the plastic plug cover. It appears in 1993 they used the same intake side cover, but the exhaust side cover was changed slightly
So once you've determined which valve covers you have, you'll know which version of these plates you need.
Spark Plug Cover Top Plate naming convention:
This is the file for the 1992 Spark Plug Cover Top Plate
This is the file for the 1993+ Spark Plug Cover Top Plate
Now you can run them just like that, keeps it very simple, affordable, and it actually looks very good in person this way. Honestly, this really is all you need and it will make a huge visual difference! However when some people sat and just looked at photos, the feedback I consistently got was that the side valleys were still sort of wide open to see through. Again I'll say (and Ali can attest) that even though those side valleys are open, this still looks great just like this in person! But none the less to try and help those who felt otherwise, I designed some side tabs that you can add if you'd like. You don't have to though. To attach them, you'll need to use some sort of 90* angle piece. You can go pick up aluminum 90* pieces at places like Home Depot. I personally ran 3/4" PVC angle from McMaster Carr. Go to their site and type in part # 8659K58 and you'll find it comes in 5ft lengths for around $8. I tried a couple different plastics, but this is the one I found to be the best as a lot of other plastic ones were extremely flimsy.
Spark Plug Cover Side Tabs naming convention:
This is the Side Tab for 'Side 2' which is the intake side. You use this tab on the intake side on both 92 & 93+ style covers, because the intake side is the same between them.
This is the Side Tab for 'Side 1' which is the exhaust side. You use this tab on the exhaust side for the 92 style covers.
This is the Side Tab for 'Side 1' which is the exhaust side. You use this tab on the exhaust side for the 93+ style covers.
This is a set of instructions showing how you I personally attached the sides to the top plate.
I've included for each part, both the Solidworks
3D model as well as a DXF
2D CAD drawing. Anyone with SW 2016 can open the 3D model and make any sort of edits they want. The DXF file is the file you should be able to give anyone with a CNC machine to just load onto their machine. For example if you find a local waterjet cutter, you can bring them a sheet of aluminum, and that DXF file, and they should be able to just load that file onto their machine and it will cut it.
On the top plates, in the file name I have "I9". All that stands for is "idea 9" as I was coming up with different vent slot ideas. So I have a whole bunch of other ideas, but that was the one that was my final design I liked. So if you have Solidworks, you can remove those vents and come up with your own ideas, or edit it however the hell you want in general. Our GE valve covers are higher in the back than they are in the front. Because of that, this part will slightly bow when you install it. Not a big deal at all, but I do want to point out that in my ventalation design, you'll notice that I didn't make the center 2 long slots go the entire way. I originally actually just did those 2 long slots that entire distance in my first prototype run. Ali actually has one of those. The issue is that because one you bolt them down the cover has a slight bow, that inside long piece of material between those 2 long slots doesn't really bow with it because those vent slots are so long, that long middle area of material is kind of free to just bend or not bend as it wants, so it kind of looked funny. So I redesigned it based on that lesson learned, so instead of those middle two vents going the entire length, I made them shorter to match the outter 2 slots, then kept an inch or so of material, and then just did shorter 2 slots at the end. This increased the stiffness and no longer has that bowing issue. So now it's a row of 4 slots, with 2 slots also on either end. I'm saying this because if you do decide to go in and make your own new vent design, keep that in mind. I highly recommend you don't do slots that entire length. Keep a couple little bridges in there like this design has for stiffening.
The curve that is on the front of this SPC was setup to mimic the curve of those clear Greddy style cam covers you can get on ebay. So you can either purchase one of those, or just trim your stock one.
- The aluminum one you'll see was made out of .090" Aluminum.
- The CF ones were made from 1.5mm thick CF.
- You can use your stock fasteners, otherwise adding some nice M6x20mm Stainless Button Head fasteners adds a real nice touch.
- I always use those black plastic spacers that you see in some of the pictures, they are 1/4" thick with a 1/4" center hole. The exact black ones I used can be found for around $5 on ebay for a 100pk.
There you go. Enjoy. Here's a few photos of what they look like:
- My original design without the side tabs, on 93+ style valve covers. This design also had the vent slots going the entire length. Again I do NOT recommend this vent design:
- Another car with the 93+ style cover. This is with the new 'Idea 9' vent design which is much better:
- Ali's car with the original 93+ style cover with no side tabs, and the old vent design:
- A local guy here with my actual first prototype ever made, out of .090" Aluminum without any vents.
- And here is my car currently. This is the 92 style, with the new good 'idea 9' vent style, with the side tabs.