- Parts Required
- 3/8 to 1/8 Adapter
- Teflon Tape
- Defi Oil Pressure Gauge

- Tools Required
- Allen Key Set
- Phillips Screwdriver
- Flathead Screwdriver
- Ratchets and Sockets
- Breaker Bar

- Recommended Number of People
- 1 Person

- Difficulty
- 5

- Time to complete
- 1 to 1.5 hrs


WARNING:Do this during an oil change. If allen key cap is removed, oil will drain

Preparation Step: Drain all oil. Replace oil filter and drain bolt, but do not refill with oil yet.

These are the locations of the places I am going to talk about. The top is the grommet through the firewall and the bottom is the location of the oil pressure sensor.
http://www.evoxforums.com/forums/attachment.php?attachmentid=7649&stc=1&d=1254611722

1. Remove panels. Follow step 1 through 6 from the following link. http://www.ami-customs.com/index.php?option=com_content&view=category&layout=blog&id=4&Itemid=4

2. Connect the following wires.
http://www.evoxforums.com/forums/attachment.php?attachmentid=7645&stc=1&d=1254610856

3. Remove the Allen keyhead with a 3/8 allen key. Try to use a breaker bar by using the allen key's on sockets. This cap is on there really tight. It took me a few good pulls to break it.
http://www.evoxforums.com/forums/attachment.php?attachmentid=7646&stc=1&d=1254611042

4. Wrap the Adapter and sensor threads with teflon tape. Do not put too much or else it will not thread. I'd suggesting wrapping 2-4x. You should still be able to see the threads on the adapter. Do not connect the adapter to the oil sensor just yet. Insert the adapter to where you just removed the allen keyhead. Measure the adapter with the allen keyhead so you know when to stop turning it. For mine, it needed 2 threads to show. You don't want to install the adapter too far in.
http://www.evoxforums.com/forums/attachment.php?attachmentid=7648&stc=1&d=1254611412

5. Once you have installed the adapter you're going to install the oil sensor into the adapter itself. Make sure you do not overtighten as the adapter may crack or your sensor might break.
http://www.evoxforums.com/forums/attachment.php?attachmentid=7647&stc=1&d=1254611412

6. Once installed, it will look like this.
http://www.evoxforums.com/forums/attachment.php?attachmentid=7650&stc=1&d=1254612034

7. Next, you're going to make an incision through the grommet through the firewall. You're gonna make an incision on the left side of the grommet, above the notch that is protruding from the grommet. Then you are going stretch it open with a phillips screw driver until you hit the other side. Be careful not to hit any wires, just go slow. Once you can push through, verify it went through by checking inside the car. Refer to the following picture. Use the following URL as a guide. http://forums.evolutionm.net/evo-x-how-tos-installations/334057-how-firewall-access.html
http://www.evoxforums.com/forums/attachment.php?attachmentid=7655&stc=1&d=1254612034
http://www.evoxforums.com/forums/attachment.php?attachmentid=7654&stc=1&d=1254612225

8. Route the line back to the gauge. Go to your engine bay and zip tie and route the line properly.

9. Refer back to Step 1 and put all your panels back on.

10. At this point, please refill your engine with the proper oil. Ensure your oil filter and drain plug is secure.

Thanks. I hope this can help some people out.

http://www.evoxforums.com/forums/attachment.php?attachmentid=7652&stc=1&d=1254612262
http://www.evoxforums.com/forums/attachment.php?attachmentid=7651&stc=1&d=1254612262

Nice write up.

Great write up, I'll put it into PDF and make you official :)

very nice

Beautiful, thanks!

PDF is up :)

beauty How 2 buddy!!
Thanks man!

Great tutorial, minus the use of teflon tape. Not sure if that's such a great idea on a car part in such high-heat conditions. Usually you are suppose to use a tapered fitting so that it seals w/out the use of tape.

Great tutorial, minus the use of teflon tape. Not sure if that's such a great idea on a car part in such high-heat conditions. Usually you are suppose to use a tapered fitting so that it seals w/out the use of tape.

I thought about it but after much reading on different threads, I went with teflon tape, plus, the manual even says to use teflon tape. Thanks.

yes its me old engine thats what killed it in end so new bearings shud do trick wud like to get and oil pressure gauge just to keep eye on it lol but apart from that u reckon the new bearings shud do it?? thanks alotneways

I love the gauge pod, who makes that??? Oh yeah, I do. LOOKS GREAT, AWESOME write up, I will be doing this in the future.

Not to hijack this thread but I happen to have a couple of these 3/8 to 1/8 npt adapters if anyone is interesed. They are not the home depot ones but correct metric fittings made out of aircraft grade 7075 aluminum. I picked up a couple extra for my gauges and they're just sitting around... PM me if interested.

Great tutorial, minus the use of teflon tape. Not sure if that's such a great idea on a car part in such high-heat conditions. Usually you are suppose to use a tapered fitting so that it seals w/out the use of tape.

First off good write up :thumbup:

Secondly I wanted to add a little something to this comment.
Typicall teflon tape is good for 550 degrees F, and the absolute max oil temps your car should see are 260 degrees F. Beyond that point your fully synthetic oil starts to fail (Conventional oil is around 240F).

Next the tapered aeroquip (AN) fittings are only to be used on equipment that has been machined with tapered matching ports. Now I see in the write up you say to use a 3/8" by 1/8" adapter, this will work and since it is a brass fitting it will fit but remember these cars are Metric based and the thread patters/Sizes are a bit different. I'm not sure of the actual size that would be but I am guessing its an M3x1.0 or so but I am rusty on my Metric cross overs.

^ hollywood X, you are correct. the home depot adapter is not the correct thread to the block. The 4B11 block uses a british pipe thread (metric).

What is the actual BSP size in the block then? Thanks


http://www.glowshiftdirect.com/18-npt-female-to-m-10p-10-male-adapter.aspx
I think this is the correct size, can anyone else confirm? Thanks

My conversion shows that 3/8 is M10

/\
Is that the correct adapter? I'll be putting in the oil pressure gauge soon and want to make sure I got everything before I start.

/
Is that the correct adapter? I'll be putting in the oil pressure gauge soon and want to make sure I got everything before I start.

No it is not the correct adapter, I ordered an M10 and it was way to small, needs to be alot bigger. I am going to be doing this soon and I am about to order a half of dozen different sizes until I get the right one since no one seems to know. The correct size will be metric. I am thinking like m16, but not sure. If you find out shoot me a PM. Thanks

http://store.42draftdesigns.com/Lancer-EVO-18quot-NPT-Oil-Pressure-Adaptor_p_53.html

http://prosportgauges.com/oil-filter-adaptor-plate.aspx

http://www.greddy.com/products/display/?Category=oil&SubCategory=27

Any of these work?

http://store.42draftdesigns.com/Lancer-EVO-18quot-NPT-Oil-Pressure-Adaptor_p_53.html

http://prosportgauges.com/oil-filter-adaptor-plate.aspx

http://www.greddy.com/products/display/?Category=oil&SubCategory=27

Any of these work?

That first link looks promising. I don't like the other two, they should work, but those are oil filter sandwiches, and I don't care for those. Let me know what you decide on. Thanks

I'm probably going with the first one. Just going to do a little more looking around over the next few days and order over the weekend.

I'm probably going with the first one. Just going to do a little more looking around over the next few days and order over the weekend.

I sent them an email and got them to send me one to test for them, they are not sure if it fits the evo X or not. So if you want to hold off I can let you know if it works?

Sounds like a plan to me. Thanks for being the guinea pig.

if someone could just tell us what the thread pitch is! you could just buy that bolt for 4 bucks, drill it out, tap it. done..

Not that simple, it is a 3/8 BSPT, so it is tapered.

Auto Meter 2269 - Auto Meter Metric Adapters (http://www.summitracing.com/parts/ATM-2269/)

View Image and Compare
http://static.summitracing.com/global/images/prod/small/atm-2269_w_s.jpg (http://www.summitracing.com/parts/ATM-2269/)
Compare Fitting, Metric Adapter, Oil Pressure, 1/8 in. NPT Female to 1/8 in. BSPT Male, Each
Part Number: ATM-2269
Estimated Ship Date: 1/11/2010

will that work?

Auto Meter 2268 - Auto Meter Metric Adapters (http://www.summitracing.com/parts/ATM-2268/)

View Image and Compare
http://static.summitracing.com/global/images/prod/small/atm-2268_w_s.jpg (http://www.summitracing.com/parts/ATM-2268/)
Compare Fitting, Metric Adapter, Oil Pressure, 1/8 in. NPT Female to 16mm x 1.5 Male, Each
Part Number: ATM-2268
Estimated Ship Date: 1/11/2010

or this one?

Not sure, best I can tell you is buy and try. I went with an oil filter sandwich just cause of the headache and I also striped the head out on the allen plug, so I had no choice really.

do i need to buy a tee for this oil pressure? but i got the defi 52mm though.

do i need to buy a tee for this oil pressure? but i got the defi 52mm though.

PM Sent!!!

Step #3 states to use a 3/8' allen key. This is incorrect. I don't know if the original poster meant to say to use a 3/8" drive allen bit socket, but it is misleading. The correct size is 8MM(thanks AMI Customs)

Another thing maybe worth mentioning is how easy it is to strip this bolt. It is only brass(thanks again AMI CUSTOMS) and strip very easily. You have to make sure you are in perfectly straight and try not to pull at an angle.

Great write up. Exactly what i've been looking for. Thanks!

So anybody has the correct adapter size? I'll be putting mine in in a couple of days.

So anybody has the correct adapter size? I'll be putting mine in in a couple of days.

I'm also wondering about this... any definitive answers?? I will likely just turn my own adapter, but need to know if the 3/8 thread is a 3/8 BSP? or BSPT? I have read both. I really don't want to drain all my oil just to gauge a stupid thread.

Step #3 states to use a 3/8' allen key. This is incorrect. I don't know if the original poster meant to say to use a 3/8" drive allen bit socket, but it is misleading. The correct size is 8MM(thanks AMI Customs)

Another thing maybe worth mentioning is how easy it is to strip this bolt. It is only brass(thanks again AMI CUSTOMS) and strip very easily. You have to make sure you are in perfectly straight and try not to pull at an angle.

It measured 8.35mm. It was 5/16 that worked in my case. It is nerve wreaking how much torque you need to get it off the car thanks to Loctite on the threads. Dino did the install for me and he is an excellent mechanic to say the least.

Go to home depot at look for a fitting with item number "776" 1/8 to 3/8 here is the link:

http://www.homedepot.com/h_d1/N-5yc1v/R-100137722/h_d2/ProductDisplay?storeId=10051&keyword=brass+776&jspStoreDir=hdus&Nu=P_PARENT_ID&navFlow=3&catalogId=10053&langId=-1&ddkey=Search

It measured 8.35mm. It was 5/16 that worked in my case. It is nerve wreaking how much torque you need to get it off the car thanks to Loctite on the threads. Dino did the install for me and he is an excellent mechanic to say the least.

Go to home depot at look for a fitting with item number "776" 1/8 to 3/8 here is the link:

http://www.homedepot.com/h_d1/N-5yc1v/R-100137722/h_d2/ProductDisplay?storeId=10051&keyword=brass+776&jspStoreDir=hdus&Nu=P_PARENT_ID&navFlow=3&catalogId=10053&langId=-1&ddkey=Search

If that home depot adapter is a NPT thread and not a BSPT thread, then IMO it should not be used due to the difference in pitch...

I believe that the 3/8 does not need to be converted to a metric thread size, since BSP sizes can be fractional... 3/8-19 being a standard BSP size. It's the thread angle of the British Standard (55 degrees) that creates 1 more TPI, as opposed to the 60 degree NPT, which standard size is 3/8-18.

So you can see that using a 3/8-18 NPT male into a 3/18-19 BSPT female may not be the best idea... the difference in pitch would be .0015" which is still a mismatch of .013" between the first and last threads over a 1/2" length (please correct my math if it's incorrect). sure it would fit, but I'm sure the use of teflon tape restricts the feeling of threads mashing together lol.

Maybe just knowing that they are different bothers me about the whole thing lol.

So is it confirmed that the 3/8 thread is tapered?

I drove over 120 miles last night at 80+ and drove my car hard today with no issues to speak of.

I drove over 120 miles last night at 80+ and drove my car hard today with no issues to speak of.

I'm sure it will function fine. I'm glad to hear it did, as I may end up going this route if I can't free up a lathe within the next couple weeks.

Besides, it's not exactly a bearing or anything where .001" here and there will really matter lol. Except maybe leaking oil (which is unlikely in any case it seems)... good thing that pressure gauge is installed! :neener: lol

I'm sure it will function fine. I'm glad to hear it did, as I may end up going this route if I can't free up a lathe within the next couple weeks.

Besides, it's not exactly a bearing or anything where .001" here and there will really matter lol. Except maybe leaking oil (which is unlikely in any case it seems)... good thing that pressure gauge is installed! :neener: lol

Locktite never hurts either :D